Apologies if this was asked before.
Hello, I'm new to Kubuntu and I've been having an issue with one of my hard drives! I dualboot Kubuntu (25.10) and Windows 10 (whatever the latest version was before it went out of service), and I have a 1TB hard drive connected to my computer. I can access it on Windows, but on Kubuntu, it will not show up in Dolphin. My Windows drive's two partitions and my external hard drive appear (and my phone when connected) and can be mounted with a click, but my 1TB does not appear. I've been having this issue for all of my installations of Kubuntu (~4?) and I've been using Kubuntu for a few months at this point.
I tried sudo fdisk -l, and sda, sdb, sdc, and sdd appeared. I believe sda4 and sda5 (out of 6) are my Windows drive's partitions, while sdc2 (out of 2) is my Kubuntu drive, and sdd1 (out of 1) is my external drive. sda1, sda2, sda3, and sda4 appear to all be related to formatting and file recovery, while sdb and its 3 parts are my 1TB. Curiously, I think the lack of it is tied to the three error messages that appear after sdb's listing in fdisk, Partition 1/2/3 does not start on physical sector boundary. I also do not know if I can access this drive through Konsole, but I doubt it.
Is there a way to fix this issue without formatting my drive entirely? It isn't necessarily difficult to move files over to Linux on this drive, but I don't want to have duplicate files on that drive and my Kubuntu drive if there is a way around it. I want to keep this drive since it has a lot of things I consider important that are hard to access again.
Thank you for any help, I'm sorry if I didn't say enough or the right things here. Please ask me if you need more information.

I have troubles to create event notes with Trilium.

There is no problem when clicking a date from a #calendar:view=dayGridMonth , here Friday 13th of February.
But when I am applying the examples of Trilium documentation, as I did for Wednesday 18th adding attributes #startDate=2026-02-18 #endDate=2026-02-19 #name="My vacation" #calendar:title="Journal", it shows nothing on the root calendar view.
Moreover, I would like to get event note with #startTime and #endTime to be usable in a week view.

Notes: javascript tag is due to the usage of this language in Trilium for the user interface.

app version : 0.101.3
DB version : 233
Sync version: 36
Build version : f5e882271895cca46170dd1bb85be42518fd7841

I am new to linux and just installed a new system on my computer in a dedicated partition. Everything is good except that I cannot get internet. The AX900 usb wifi adapter works fine with windows but linux does not see a wifi adapter. I downloaded the linux driver, followed the instructions, but still i get "no wifi adapter found." I think it sees the adapter as a flash drive, because it shows up in the left column. Any suggestions?

This is my first time setting up a server. I don't know what commands to use

On updating to 24 the name of the current foremost application has gone from the top bar. Hunted for a solution but not found an add-on that will do it. When running two applications side by side it's very easy to close a window in the wrong one.

For some weird reason, my Ubuntu 24.04.3 has stopped booting from the default Ubuntu option in GRUB bootloader. I had to boot from a different kernel inside Advanced Options for Ubuntu. I found the problem when checking GRUB config, the menuentry and submenus have this order:

Ubuntu
Advanced Options for Ubuntu
|----Ubuntu, with Linux 6.17.0-14-generic
|----Ubuntu, with Linux 6.17.0-14-generic (recovery mode)
|----Ubuntu, with Linux 6.14.0-37-generic
|----Ubuntu, with Linux 6.14.0-37-generic (recovery mode)

I need to boot with Linux 6.14.0-37-generic kernel (it's the one that works) but the default menuentry uses the Linux 6.17.0-14-generic. I followed the advice in this question: Ubuntu 22.04 only boot normally via recovery mode and it works in a way that now GRUB selects Advanced Options for Ubuntu > Ubuntu, with Linux 6.14.0-37-generic by default. I can work with this but I was wondering if there is a way to change the kernel in the First 0 Ubuntu entry? Right now it says this:

menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-6c124b9f-86c1-4d04-b595-b7c125ec43cf' {
    recordfail
    load_video
    gfxmode $linux_gfx_mode
    insmod gzio
    if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
    insmod part_gpt
    insmod ext2
    search --no-floppy --fs-uuid --set=root 6c124b9f-86c1-4d04-b595-b7c125ec43cf
    linux   /boot/vmlinuz-6.17.0-14-generic root=UUID=6c124b9f-86c1-4d04-b595-b7c125ec43cf ro  quiet splash $vt_handoff
    initrd  /boot/initrd.img-6.17.0-14-generic
}

Notice how it boots from 6.17.0-14-generic. Since the /boot/grub/grub.cfg very clearly says to NOT EDIT THIS FILE I cannot figure out how I can tell GRUB to always boot from Linux 6.14.0-37-generic without following the Advanced Options entry. Any help is appreciated, thank you!

Update: I have looked at this question: How to stop using the HWE kernel and go back to the GA kernel? and followed its advise by removing the HWE kernels. But this doesn't remove the problematic 6.17.0-14-generic. The first menuentry still uses the 6.17.0-14-generic and fails to boot. I am curious if removing this specific kernel will solve the problem but I am also sort of scared if this will irreversibly break anything.

I am a new Ubuntu user who's having trouble getting .CR3 files to show thumbnails on Nautilus. I tried adding the appropriate MIME Type to my thumbnailer file: image/x-cr3;image/x-canon-cr3 (and several other variations pasted from a massive list of RAW photo file types). I saw that the previous question about this same issue was never answered, so I am not sure where to go. I followed the tutorial in this YouTube video.

OS: Kubuntu 24.04, kernel version: 6.8.0-94-generic (64-bit)

Device: TOSHIBA PORTEGE R835, 4 × Intel® Core™ i3-2310M CPU @ 2.10GHz

I 'tri' boot windows and kubuntu + linux mint. I used to be able to connect to the school wifi just fine, with an even better experience than on windows. About a year ago I began to have this issue of linux indicating that I am connected to the school wifi but not being able to use the internet although the internet works on windows and on my android phone, leading me to abandon linux. To connect to the school wifi, there is a portal for school credentials. Does anyone know what is wrong?

I am trying to add the Virtualbox repositories to Ubuntu 24.04.4LTS

The instructions are here.

I downloaded the key from https://www.virtualbox.org/download/oracle_vbox_2016.asc
And placed it in ~/Downloads/Virtualbox/oracle_vbox_2016.asc

I then added the key to /usr/share/keyrings/ with
sudo gpg --yes --output /usr/share/keyrings/oracle-virtualbox-2016.gpg --dearmor ~/Downloads/Virtualbox/oracle_vbox_2016.asc

So I now have /usr/share/keyrings/oracle-virtualbox-2016.gpg.

Next I have to deal with the line
deb [arch=amd64 signed-by=/usr/share/keyrings/oracle-virtualbox-2016.gpg] https://download.virtualbox.org/virtualbox/debian <mydist> contrib

The GUI at 'Administration > Software & Updates` doesn't like the bit in brackets [...].

Neither does, add-apt-repository.

So now I'm trying to manually add everything to /etc/apt/sources.list.d/ubuntu.sources.

The current ubuntu.sources is

Types: deb
URIs: http://gb.archive.ubuntu.com/ubuntu/
Suites: noble noble-updates noble-backports
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

Types: deb
URIs: http://security.ubuntu.com/ubuntu/
Suites: noble-security
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

So I'm guessing I need to add:

Types: deb
URIs: https://download.virtualbox.org/virtualbox/debian
Suites: *1
Components: *2
Signed-By: /usr/share/keyrings/oracle-virtualbox-2016.gpg

But what do I put at *1 and *2 ?

Given that the Oracle deb line ends, <mydist> contrib, do I simply put noble at *1 and contrib at *2 ?

Edit 1

Thank you, @heynnema, for your answer.
That appears to have worked up to a point, but now Synaptic shows:

Versions 7.0, 7.1 and 7.2 appear available.
However,

• 'virtualbox' references 7.0
• all of the extras such as 'guest additions' and 'dkms' are only for 7.0

What if I want 7.1 or 7.2 with all the extras?
In most situations I'll need Guest Additions at the least.

I'm using Ubuntu Mate 25.10.

I'd like to install LibreWolf.

Any suggestions?

"Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver is either not loaded or not set up correctly"

"…Please reinstall virtualbox-dkms package and load the kernel module by executing 'modprobe vboxdrv' as root."

$ uname -a
Linux AM5 6.17.0-14-generic #14~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Jan 15 15:52:10 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

This appears to be a recurring problem with no definitive answer: each time it comes up, a previous solution fails to work and a new answer is needed. I've lost track of how many questions and 'answers' I've read on this.

There must be many thousands of people who rely upon Virtualbox to run other Linux, and especially Windows, on Linux. And many will be on Ubuntu. So I don't understand why there isn't already a fix. I don't even know which update caused it. All of a sudden, VB can't start a virtual machine.

Would subscribing to Ubuntu Pro help?

Perhaps I got a 'phased' update, so most of the rest of you are oblivious of the problem?

NB, I've checked the BIOS: secure boot is DISABLED.

Below is some of what I've tried.

Edit 1, Edit 2, etc, are my responses to @heynnema's heroic efforts to find the solution for me. Our exchange (including help from @nobody) was moved by a moderator from Comments to Chat.

So, first try what it says in the error message:

$ sudo apt reinstall virtualbox-dkms
[sudo] password for alan: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
0 to upgrade, 0 to newly install, 1 reinstalled, 0 to remove and 38 not to upgrade.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
E: Internal Error, No file name for virtualbox-dkms:amd64

Keep going — maybe the modprobe will work:

$ sudo modprobe vboxdrv
[sudo] password for alan: 
alan@AM5:~$ 

Restart Virtualbox. Try to start virtual machine. Virtual machine immediately goes from 'Saved' to 'Aborted Saved'.

Powering VM up...
VM Name: ...
The VM session was aborted.
Result code: NS_ERROR_FAILURE (0X80004005)
Component: SessionMachine
Interface: ISession {c044...}

Thank goodness I have a backup.

Edit grub and roll back to old kernel: nothing changes.

Let's try update/upgrade:

sudo apt upgrade  

[...]  

Setting up virtualbox-dkms (7.0.16-dfsg-2ubuntu1.1) ...
Removing old virtualbox-7.0.16 DKMS files...
Module virtualbox-7.0.16 for kernel 6.14.0-37-generic (x86_64).
Before uninstall, this module version was ACTIVE on this kernel.

vboxdrv.ko.zst:
 - Uninstallation
   - Deleting from: /lib/modules/6.14.0-37-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

vboxnetadp.ko.zst:
 - Uninstallation
   - Deleting from: /lib/modules/6.14.0-37-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

vboxnetflt.ko.zst:
 - Uninstallation
   - Deleting from: /lib/modules/6.14.0-37-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.
depmod...
Deleting module virtualbox-7.0.16 completely from the DKMS tree.
Loading new virtualbox-7.0.16 DKMS files...
Building for 6.14.0-37-generic 6.17.0-14-generic
Building initial module for 6.14.0-37-generic
Done.

vboxdrv.ko.zst:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.14.0-37-generic/updates/dkms/

vboxnetadp.ko.zst:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.14.0-37-generic/updates/dkms/

vboxnetflt.ko.zst:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.14.0-37-generic/updates/dkms/
depmod...
Building initial module for 6.17.0-14-generic
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/virtualbox-dkms.0.crash'
Error! Bad return status for module build on kernel: 6.17.0-14-generic (x86_64)
Consult /var/lib/dkms/virtualbox/7.0.16/build/make.log for more information.
dpkg: error processing package virtualbox-dkms (--configure):
 installed virtualbox-dkms package post-installation script subprocess returned error exit status 10  

[...]  

errors were encountered while processing:
 virtualbox-dkms
E: Sub-process /usr/bin/dpkg returned an error code (1)

Consult /var/lib/dkms/virtualbox/7.0.16/build/make.log for more information.

I forgot to capture this before attempting to reinstall VB --- it's gone.

Tried to install a later version of VB direct from Oracle: failed.
Now I get: "Failed to acquire the VirtualBox COM object. The application will now terminate."

Yes, I know, I should have taken a more systematic approach. But it's difficult to write this on the machine you're trying to fix. Especially as some 'answers' have such enticing 'solutions'...

To understand the Edits, please see the Chat

Edit 1

Managed to install VB 7.1
Same original problem, but now it says to run /sbin/vboxconfig

$ sudo /sbin/vboxconfig
[sudo] password for alan: 
vboxdrv.sh: Stopping VirtualBox services.
vboxdrv.sh: Starting VirtualBox services.
vboxdrv.sh: Building VirtualBox kernel modules.
vboxdrv.sh: failed: Look at /var/log/vbox-setup.log to find out what went wrong.

There were problems setting up VirtualBox.  To re-start the set-up process, run
  /sbin/vboxconfig
as root.  If your system is using EFI Secure Boot you may need to sign the
kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load
them. Please see your Linux system's documentation for more information.
alan@AM5:~$ 

Look at /var/log/vbox-setup.log to find out what went wrong.

Building the main VirtualBox module.
Error building the module:
make V=1 CONFIG_MODULE_SIG= CONFIG_MODULE_SIG_ALL= -C /lib/modules/6.17.0-14-generic/build M=/tmp/vbox.0 SRCROOT=/tmp/vbox.0 -j32
 modules
make[1]: warning: -j32 forced in submake: resetting jobserver mode.
make  -C /tmp/vbox.0 \
-f /usr/src/linux-headers-6.17.0-14-generic/Makefile modules
warning: the compiler differs from the one used to build the kernel
  The kernel was built by: x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
  You are using:           gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0

[...]  
[several "fatal error" messages:]

VBox/cdefs.h: No such file or directory  
VBox/sup.h: No such file or directory  
iprt/string.h: No such file or directory  
internal/iprt.h: No such file or directory  
the-linux-kernel.h: No such file or directory  

$ ll /usr/bin | grep gcc
lrwxrwxrwx  1 root root   23 Sep  4  2024 gcc-13 -> x86_64-linux-gnu-gcc-13*

So it would appear the warning about the compiler is a red herring.

Edit 2

$ dpkg -l *virtualbox*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                           Version                    Architecture Description
+++-==============================-==========================-============-==============================================
ic  virtualbox                     7.0.16-dfsg-2ubuntu1.1     amd64        x86 virtualization solution - base binaries
un  virtualbox-2.0                 <none>                     <none>       (no description available)
un  virtualbox-2.1                 <none>                     <none>       (no description available)
un  virtualbox-2.2                 <none>                     <none>       (no description available)
un  virtualbox-3.0                 <none>                     <none>       (no description available)
un  virtualbox-3.1                 <none>                     <none>       (no description available)
un  virtualbox-3.2                 <none>                     <none>       (no description available)
un  virtualbox-4.0                 <none>                     <none>       (no description available)
un  virtualbox-4.1                 <none>                     <none>       (no description available)
un  virtualbox-4.2                 <none>                     <none>       (no description available)
un  virtualbox-4.3                 <none>                     <none>       (no description available)
un  virtualbox-5.0                 <none>                     <none>       (no description available)
un  virtualbox-5.1                 <none>                     <none>       (no description available)
un  virtualbox-5.2                 <none>                     <none>       (no description available)
un  virtualbox-6.0                 <none>                     <none>       (no description available)
un  virtualbox-6.1                 <none>                     <none>       (no description available)
un  virtualbox-7.0                 <none>                     <none>       (no description available)
ii  virtualbox-7.1                 7.1.8-168469~Ubuntu~noble  amd64        Oracle VirtualBox
rc  virtualbox-7.2                 7.2.6-172322~Ubuntu~plucky amd64        Oracle VirtualBox
un  virtualbox-dkms                <none>                     <none>       (no description available)
rc  virtualbox-ext-pack            7.0.16-1                   all          extra capabilities for VirtualBox, downloader.
un  virtualbox-guest-additions-iso <none>                     <none>       (no description available)
un  virtualbox-guest-modules       <none>                     <none>       (no description available)
un  virtualbox-modules             <none>                     <none>       (no description available)
un  virtualbox-ose                 <none>                     <none>       (no description available)
un  virtualbox-qt                  <none>                     <none>       (no description available)
un  virtualbox-source              <none>                     <none>       (no description available)
alan@AM5:~$ 

$ sudo dkms status
[sudo] password for alan: 
alan@AM5:~$ 

(no output from dkms status)

Yes, linux-headers-6.17.0-14-generic installed:

$ sudo apt show linux-headers-6.17.0-14-generic
Package: linux-headers-6.17.0-14-generic
Version: 6.17.0-14.14~24.04.1
Priority: optional
Section: devel
Source: linux-hwe-6.17
Origin: Ubuntu
Maintainer: Ubuntu Kernel Team <kernel-team@lists.ubuntu.com>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 30.6 MB
Provides: linux-headers, linux-headers-3.0
Depends: linux-hwe-6.17-headers-6.17.0-14, libc6 (>= 2.38), libdw1t64 (>= 0.171), libelf1t64 (>= 0.144), libgcc-s1 (>= 4.2), libssl3t64 (>= 3.0.0), zlib1g (>= 1:1.2.3.3)
Download-Size: 3,979 kB
APT-Manual-Installed: yes
APT-Sources: http://gb.archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
Description: Linux kernel headers for version 6.17.0
 This package provides kernel header files for version 6.17.0.
 .
 This is for sites that want the latest kernel headers.  Please read
 /usr/share/doc/linux-headers-6.17.0-14/debian.README.gz for details.

alan@AM5:~$ 

Edit 3

$ sudo apt purge virtualbox=7.0.16-dfsg-2ubuntu1.1
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED
  virtualbox*
0 to upgrade, 0 to newly install, 1 to remove and 12 not to upgrade.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] 
(Reading database ... 479790 files and directories currently installed.)
Purging configuration files for virtualbox (7.0.16-dfsg-2ubuntu1.1) ...

$ sudo apt purge virtualbox-ext-pack=7.0.16-1
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED
  virtualbox-ext-pack*
0 to upgrade, 0 to newly install, 1 to remove and 12 not to upgrade.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] 
(Reading database ... 479788 files and directories currently installed.)
Purging configuration files for virtualbox-ext-pack (7.0.16-1) ...

$ sudo apt reinstall ./virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'virtualbox-7.1' instead of './virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb'
0 to upgrade, 0 to newly install, 1 reinstalled, 0 to remove and 12 not to upgrade.
Need to get 0 B/108 MB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 /tmp/virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb virtualbox-7.1 amd64 7.1.8-168469~Ubuntu~noble [108 MB]
Preconfiguring packages ...        
(Reading database ... 479788 files and directories currently installed.)
Preparing to unpack .../virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb ...
Unpacking virtualbox-7.1 (7.1.8-168469~Ubuntu~noble) over (7.1.8-168469~Ubuntu~noble) ...
Setting up virtualbox-7.1 (7.1.8-168469~Ubuntu~noble) ...
info: The group `vboxusers' already exists as a system group. Exiting.
vboxdrv.sh: failed: Look at /var/log/vbox-setup.log to find out what went wrong.

There were problems setting up VirtualBox.  To re-start the set-up process, run
  /sbin/vboxconfig
as root.  If your system is using EFI Secure Boot you may need to sign the
kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load
them. Please see your Linux system's documentation for more information.
Processing triggers for desktop-file-utils (0.27-2build1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1.1ubuntu3) ...
Processing triggers for mate-menus (1.26.1-1build3) ...
Processing triggers for shared-mime-info (2.4-4) ...
Processing triggers for bamfdaemon (0.5.6+22.04.20220217-0ubuntu5) ...
Rebuilding /usr/share/applications/bamf-2.index...
alan@AM5:/tmp$ 

Same fatal errors: "no such file or directory"

NB 7.1 not in repository, only have .deb from Oracle (sorry, didn't make that clear).

Edit 4

Reinstall of VB 7.1 from within ~/Downloads/Virtualbox/

alan@AM5:~/Downloads/Virtualbox$ sudo apt reinstall ./virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb 
[sudo] password for alan: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'virtualbox-7.1' instead of './virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb'
0 to upgrade, 0 to newly install, 1 reinstalled, 0 to remove and 12 not to upgrade.
Need to get 0 B/108 MB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 /home/alan/Downloads/Virtualbox/virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb virtualbox-7.1 amd64 7.1.8-168469~Ubuntu~noble [108 MB]
Preconfiguring packages ...        
(Reading database ... 479788 files and directories currently installed.)
Preparing to unpack .../virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb ...
Unpacking virtualbox-7.1 (7.1.8-168469~Ubuntu~noble) over (7.1.8-168469~Ubuntu~noble) ...
Setting up virtualbox-7.1 (7.1.8-168469~Ubuntu~noble) ...
info: The group `vboxusers' already exists as a system group. Exiting.
vboxdrv.sh: failed: Look at /var/log/vbox-setup.log to find out what went wrong.

There were problems setting up VirtualBox.  To re-start the set-up process, run
  /sbin/vboxconfig
as root.  If your system is using EFI Secure Boot you may need to sign the
kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load
them. Please see your Linux system's documentation for more information.
Processing triggers for desktop-file-utils (0.27-2build1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1.1ubuntu3) ...
Processing triggers for mate-menus (1.26.1-1build3) ...
Processing triggers for shared-mime-info (2.4-4) ...
Processing triggers for bamfdaemon (0.5.6+22.04.20220217-0ubuntu5) ...
Rebuilding /usr/share/applications/bamf-2.index...
N: Download is performed unsandboxed as root, as file '/home/alan/Downloads/Virtualbox/virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
alan@AM5:~/Downloads/Virtualbox$ 

Re-run of /sbin/vboxconfig

alan@AM5:~/Downloads/Virtualbox$ sudo /sbin/vboxconfig
vboxdrv.sh: Stopping VirtualBox services.
vboxdrv.sh: Starting VirtualBox services.
vboxdrv.sh: Building VirtualBox kernel modules.
vboxdrv.sh: failed: Look at /var/log/vbox-setup.log to find out what went wrong.

There were problems setting up VirtualBox.  To re-start the set-up process, run
  /sbin/vboxconfig
as root.  If your system is using EFI Secure Boot you may need to sign the
kernel modules (vboxdrv, vboxnetflt, vboxnetadp, vboxpci) before you can load
them. Please see your Linux system's documentation for more information.
alan@AM5:~/Downloads/Virtualbox$ 

$ grep -i "no such" /var/log/vbox-setup.log
linux/../SUPDrvInternal.h:47:10: fatal error: VBox/cdefs.h: No such file or directory
SUPDrvInternal.h:47:10: fatal error: VBox/cdefs.h: No such file or directory
SUPDrvInternal.h:47:10: fatal error: VBox/cdefs.h: No such file or directory
SUPDrvInternal.h:47:10: fatal error: VBox/cdefs.h: No such file or directory
SUPDrvInternal.h:47:10: fatal error: VBox/cdefs.h: No such file or directory
SUPLibAll.c:41:10: fatal error: VBox/sup.h: No such file or directory
common/string/strformatrt.c:42:10: fatal error: iprt/string.h: No such file or directory
combined-agnostic1.c:38:10: fatal error: internal/iprt.h: No such file or directory
combined-agnostic2.c:38:10: fatal error: internal/iprt.h: No such file or directory
combined-os-specific.c:38:10: fatal error: the-linux-kernel.h: No such file or directory

Edit 5

alan@AM5:~/Downloads/Virtualbox$ ls -al virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb 
-rw-rw-r-- 1 alan alan 108093464 May  3  2025 virtualbox-7.1_7.1.8-168469~Ubuntu~noble_amd64.deb

$ dpkg -l *headers* | grep ii
ii  linux-headers-6.11.0-21-generic  6.11.0-21.21~24.04.1 amd64        Linux kernel headers for version 6.11.0 on 64 bit x86 SMP
ii  linux-headers-6.11.0-29-generic  6.11.0-29.29~24.04.1 amd64        Linux kernel headers for version 6.11.0 on 64 bit x86 SMP
ii  linux-headers-6.14.0-37-generic  6.14.0-37.37~24.04.1 amd64        Linux kernel headers for version 6.14.0
ii  linux-headers-6.17.0-14-generic  6.17.0-14.14~24.04.1 amd64        Linux kernel headers for version 6.17.0
ii  linux-headers-6.8.0-100          6.8.0-100.100        all          Header files related to Linux kernel version 6.8.0
ii  linux-headers-6.8.0-100-generic  6.8.0-100.100        amd64        Linux kernel headers for version 6.8.0 on 64 bit x86 SMP
ii  linux-headers-generic            6.8.0-100.100        amd64        Generic Linux kernel headers
ii  linux-headers-generic-hwe-24.04  6.17.0-14.14~24.04.1 amd64        Generic Linux kernel headers
ii  linux-hwe-6.11-headers-6.11.0-21 6.11.0-21.21~24.04.1 all          Header files related to Linux kernel version 6.11.0
ii  linux-hwe-6.11-headers-6.11.0-29 6.11.0-29.29~24.04.1 all          Header files related to Linux kernel version 6.11.0
ii  linux-hwe-6.14-headers-6.14.0-37 6.14.0-37.37~24.04.1 all          Header files related to Linux kernel version 6.14.0
ii  linux-hwe-6.17-headers-6.17.0-14 6.17.0-14.14~24.04.1 all          Header files related to Linux kernel version 6.17.0
alan@AM5:~/Downloads/Virtualbox$ 

$ sudo apt purge virtualbox-7.1
[sudo] password for alan: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  liblzf1 libqt6core6t64 libqt6dbus6t64 libqt6gui6t64 libqt6help6 libqt6network6t64 libqt6opengl6t64 libqt6printsupport6t64
  libqt6qml6 libqt6qmlmodels6 libqt6quick6 libqt6sql6-sqlite libqt6sql6t64 libqt6statemachine6 libqt6waylandclient6
  libqt6waylandcompositor6 libqt6waylandeglclienthwintegration6 libqt6waylandeglcompositorhwintegration6 libqt6widgets6t64
  libqt6wlshellintegration6 libqt6xml6t64 libsdl-ttf2.0-0 libsdl1.2debian libtpms0 libts0t64 qt6-gtk-platformtheme
  qt6-qpa-plugins qt6-translations-l10n qt6-wayland
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED
  virtualbox-7.1*
0 to upgrade, 0 to newly install, 1 to remove and 12 not to upgrade.
After this operation, 242 MB disk space will be freed.
Do you want to continue? [Y/n] 
(Reading database ... 479788 files and directories currently installed.)
Removing virtualbox-7.1 (7.1.8-168469~Ubuntu~noble) ...
Processing triggers for desktop-file-utils (0.27-2build1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1.1ubuntu3) ...
Processing triggers for mate-menus (1.26.1-1build3) ...
Processing triggers for shared-mime-info (2.4-4) ...
Processing triggers for bamfdaemon (0.5.6+22.04.20220217-0ubuntu5) ...
Rebuilding /usr/share/applications/bamf-2.index...
(Reading database ... 479039 files and directories currently installed.)
Purging configuration files for virtualbox-7.1 (7.1.8-168469~Ubuntu~noble) ...
dpkg: warning: while removing virtualbox-7.1, directory '/usr/local' not empty so not removed
alan@AM5:~/Downloads/Virtualbox$ 

Synaptic used to install virtualbox 7.0.16-dfsg-2ubuntu1.1
Synaptic also chose and installed virtualbox-dkms and virtualbox-qt

Virtualbox will run, but I'm back to the original problem.

Edit 6

Synaptic search for "linux-headers-generic":
Looks like the 6.8 headers are still installed.

Uninstall?

From HWE kernels in Ubuntu docs: "HWE (Hardware Enablement) kernels are only enabled on Ubuntu long-term support (LTS) releases...By default, Ubuntu Desktop installations of 24.04 default to tracking the HWE stack.".

alan@AM5:~$ uname -r
6.17.0-14-generic
alan@AM5:~$ 
alan@AM5:~$ dkms status
virtualbox/7.0.16: added
alan@AM5:~$ 

Edit 7

alan@AM5:~$ sudo dkms build virtualbox/7.0.16
[sudo] password for alan: 
Sign command: /usr/bin/kmodsign
Signing key: /var/lib/shim-signed/mok/MOK.priv
Public certificate (MOK): /var/lib/shim-signed/mok/MOK.der

Building module:
Cleaning build area...
make -j32 KERNELRELEASE=6.17.0-14-generic -C /lib/modules/6.17.0-14-generic/build M=/var/lib/dkms/virtualbox/7.0.16/build...(bad exit status: 2)
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/virtualbox-dkms.0.crash'
Error! Bad return status for module build on kernel: 6.17.0-14-generic (x86_64)
Consult /var/lib/dkms/virtualbox/7.0.16/build/make.log for more information.
alan@AM5:~$ 

The resulting make.log:
/var/lib/dkms/virtualbox/7.0.16/build/make.log [pastebin]

Output from:
sudo apt install build-essential dkms linux-headers-$(uname -r) [pastebin]

alan@AM5:~$ sudo /sbin/vboxconfig
[sudo] password for alan: 
sudo: /sbin/vboxconfig: command not found
alan@AM5:~$ 

alan@AM5:~$ sudo modprobe vboxdrv
modprobe: FATAL: Module vboxdrv not found in directory /lib/modules/6.17.0-14-generic
alan@AM5:~$ 

Edit 8

sudo apt purge virtualbox-7.2 Appears to remove 7.0, then says, "Package virtualbox-7.2 which provides virtualbox is not installed" ! Did I use the wrong command?

@heynnema: "Install virtualbox-source and virtualbox-modules using Synaptic"

Synaptic shows virtualbox-source but no virtualbox-modules.

Install via Synaptic of virtualbox-source:

E: virtualbox-dkms: installed virtualbox-dkms package post-installation script subprocess returned error exit status 10

But Synaptic does show virtualbox-source as installed.

In the description of virtualbox-source: "The source is placed under /usr/src, and after decompression it can be built to produce a virtualbox-modules-KVERS providing "virtualbox-modules" package." So I shall proceed with the source install...

After install, there is /usr/src/virtualbox.tar.bz2.

Extracting that creates /usr/src/modules/virtualbox/, which contains:

alan@AM5:/usr/src$ ll modules/virtualbox/
total 52
drwxr-xr-x 12 root root 4096 Sep  2  2024 ./
drwxr-xr-x  3 root root 4096 Sep  2  2024 ../
drwxr-xr-x 10 root root 4096 Sep  2  2024 common/
drwxr-xr-x  2 root root 4096 Sep  2  2024 debian/
drwxr-xr-x  2 root root 4096 Sep  2  2024 generic/
drwxr-xr-x  5 root root 4096 Sep  2  2024 include/
-rw-r--r--  1 root root   56 Aug 25  2023 Makefile
drwxr-xr-x  3 root root 4096 Sep  2  2024 math/
drwxr-xr-x  4 root root 4096 Sep  2  2024 r0drv/
drwxr-xr-x  2 root root 4096 Sep  2  2024 VBox/
drwxr-xr-x  3 root root 4096 Sep  2  2024 vboxdrv/
drwxr-xr-x  3 root root 4096 Sep  2  2024 vboxnetadp/
drwxr-xr-x  3 root root 4096 Sep  2  2024 vboxnetflt/
alan@AM5:/usr/src$ 

Edit 9

alan@AM5:/usr/src$ dkms status
virtualbox/7.0.16: added
alan@AM5:/usr/src$

alan@AM5:/usr/src$ sudo dkms build virtualbox/7.0.16
Sign command: /usr/bin/kmodsign
Signing key: /var/lib/shim-signed/mok/MOK.priv
Public certificate (MOK): /var/lib/shim-signed/mok/MOK.der

Building module:
Cleaning build area...
make -j32 KERNELRELEASE=6.17.0-14-generic -C /lib/modules/6.17.0-14-generic/build M=/var/lib/dkms/virtualbox/7.0.16/build...(bad exit status: 2)
Error! Bad return status for module build on kernel: 6.17.0-14-generic (x86_64)
Consult /var/lib/dkms/virtualbox/7.0.16/build/make.log for more information.
alan@AM5:/usr/src$ 

I am running a Windows 11 guest via virt-manager kvm on Ubuntu 22.94. My Windows display resolution is set as 1920x1080, but the active signal resolution is showing as 600x480 and the refresh rate is showing as unknown. I am using qxl driver and spice server on virt-viewer. Spice guest tool for Windows is also installed. Please help to bring up the active signal resolution to 1920x1080.

The problem seems to only happen in software that is the same type of UI. I don't know what that UI is called, but the images below show what I am talking about. This is an image of my Extensions Manager:

As you can see, tons of parts are missing. This also happens with the Epiphany web browser:

I have written some text in the search bar, but it does not show up. It does, however, show up when the window isn't in focus, but I can't capture this with a screenshot, as the text disappears when I enter screenshot mode.

These are the fixes that I have tried so far:

Alt+f2 and then typing r
Restarting my computer
sudo fc-cache -r , sudo fc-cache -f and sudo fc-cache

This is my PC information:

   OS: Zorin OS 16.3 x86_64
   Host: MS-7C75 2.0
   Kernel: 5.15.0-107-generic
   Packages: 3088 (dpkg), 111 (flatpak)
   Shell: bash 5.0.17
   Resolution: 1920x1080, 1920x1080
   DE: GNOME
   WM: Mutter
   WM Theme: ZorinBlue-Dark
   Theme: ZorinBlue-Dark [GTK2/3]
   Icons: ZorinBlue-Dark [GTK2/3]
   Terminal: gnome-terminal
   CPU: Intel i7-10700K (16) @ 5.100GHz
   GPU: NVIDIA GeForce GTX 1060 6GB
   Memory: 3983MiB / 23948MiB

OS: Ubuntu 20.04

kernel: 5.15.0-58-generic

Symptoms: system freezes or hangs at boot at exactly the same location. The cursor blinks about 30 times, and then freezes. The boot screen output is shown:

[    0.157844] x86/cpu: SGX disabled by BIOS.
[    0.380956] ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC],
AE_NOT_FOUND (20210730/psargs-330)
[    0.380972] ACPI Error: Aborting method \_PR.CPU1._CPC due to previous error
(AE_NOT_FOUND) (20210730/psparse-529)
[    0.381018] ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC],
AE_NOT_FOUND (20210730/psargs-330)
[    0.381028] ACPI Error: Aborting method \_PR.CPU2._CPC due to previous error
(AE_NOT_FOUND) (20210730/psparse-529)
[    0.381070] ACPI BIOS Error (bug): Could not resolve symbol [\_PR.CPU0._CPC],
AE_NOT_FOUND (20210730/psargs-330)
[    0.381080] ACPI Error: Aborting method \_PR.CPU3._CPC due to previous error
(AE_NOT_FOUND) (20210730/psparse-529)
[    1.594362] device-mapper: table: 253:0: raid: unknown target type
/dev/sda8: clean, 204252/56958976 files, 6741691/227812608 blocks
_

Ctrl-Alt-Del works fine. The network is fine after recovery menu. Mounted USBs work fine. The "entire" log is included at the bottom of this post. likely culprits Nvidia, Wayland, gdm3 , GNOME issues, or some combination of those.

Wayland:

journalctl errors related to gdm-wayland-session.

Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.1' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.2' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:50 Tower gnome-session[1524]: gnome-session-binary[1524]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
Jan 17 20:31:50 Tower gnome-session[1524]: gnome-session-binary[1524]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
Jan 17 20:31:50 Tower gnome-session-binary[1524]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.2' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.2' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.2' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.2' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:50 Tower /usr/lib/gdm3/gdm-wayland-session[1523]: dbus-daemon[1523]: [session uid=125 pid=1523] Activating service name='org.freedesktop.systemd1' requested by ':1.2' (uid=125 pid=1524 comm="/usr/libexec/gnome-session-binary --systemd --auto" label="unconfined")
Jan 17 20:31:56 Tower gnome-session[1524]: gnome-session-binary[1524]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
Jan 17 20:31:56 Tower gnome-session[1524]: gnome-session-binary[1524]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
Jan 17 20:31:56 Tower gnome-session-binary[1524]: Unrecoverable failure in required component org.gnome.Shell.desktop
Jan 17 20:31:56 Tower gnome-session-binary[1524]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1

Gnome:

journalctl errors related to gnome-shell and gnome-session-binary

Jan 17 20:31:54 Tower systemd[1487]: Started Tracker metadata database store and lookup manager.
Jan 17 20:31:54 Tower systemd[1487]: Startup finished in 9.657s.
Jan 17 20:31:55 Tower gnome-shell[1594]: Failed to create backend: No GPUs with outputs found
Jan 17 20:31:56 Tower systemd[1]: NetworkManager-dispatcher.service: Succeeded.
Jan 17 20:31:56 Tower gnome-session[1524]: gnome-session-binary[1524]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
Jan 17 20:31:56 Tower gnome-session-binary[1524]: Unrecoverable failure in required component org.gnome.Shell.desktop
Jan 17 20:31:56 Tower gnome-session-binary[1524]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
Jan 17 20:31:56 Tower gdm-launch-environment][1480]: pam_unix(gdm-launch-environment:session): session closed for user gdm
Jan 17 20:31:56 Tower gdm3[1473]: GdmDisplay: Session never registered, failing
Jan 17 20:31:56 Tower systemd[1]: session-c1.scope: Succeeded.
Jan 17 20:31:56 Tower systemd-logind[1270]: Session c1 logged out. Waiting for processes to exit.
Jan 17 20:31:56 Tower systemd-logind[1270]: Removed session c1.
Jan 17 20:31:56 Tower gdm3[1473]: Child process -1515 was already dead.
Jan 17 20:31:56 Tower systemd[1]: plymouth-start.service: Succeeded.
Jan 17 20:31:56 Tower systemd[1]: plymouth-quit-wait.service: Succeeded.
Jan 17 20:31:56 Tower systemd[1]: Finished Hold until boot process finishes up.

Errors related to gdm3:

Jan 17 20:31:56 Tower gdm3[1473]: GdmDisplay: Session never registered, failing
Jan 17 20:31:56 Tower gdm3[1473]: Child process -1515 was already dead.
Jan 17 20:31:56 Tower gdm3[1672]: modprobe: FATAL: Module nvidia not found in directory /lib/modules/5.15.0-58-generic
Jan 17 20:32:06 Tower gdm3[1697]: modprobe: FATAL: Module nvidia not found in directory /lib/modules/5.15.0-58-generic
Jan 17 20:32:16 Tower gdm3[1473]: Child process -1515 was already dead.
Jan 17 20:32:18 Tower gdm3[1473]: Tried to look up non-existent conversation gdm-launch-environment
Jan 17 20:32:18 Tower gdm3[1825]: modprobe: FATAL: Module nvidia not found in directory /lib/modules/5.15.0-58-generic
Jan 17 20:32:28 Tower gdm3[1473]: Freeing conversation 'gdm-launch-environment' with active job
Jan 17 20:32:28 Tower gdm3[1860]: modprobe: FATAL: Module nvidia not found in directory /lib/modules/5.15.0-58-generic

log:

Uninterrupted log containing all the above errors in their context. The entire log, is of course, much longer than this.

Unfortunately, I could not include the entire boot log. askubuntu website keeps marking it as "spam".

I did a clean install of Ubuntu 22.04 and during the installation I connected my wireless card to my network. At the next reboot everything was OK and the card connected. Then I launched the search for additional third-party drivers for my Nvidia graphics card. To my surprise scrolling down I saw that my model of Realtek wireless card was recognized, but under it was written "the device is not working" and and "do not use the device" was selected, but everything worked great anyway.

I attached a screenshot of the Additional Drivers tab in my Software & Updates window.

Is it a bug or am I the one who does not understand the meaning? Finally however I chose to use the DKMS driver.

Maybe it sounds strange to use a USB CD-Drive nowadays. However, I need to get an old data from a CD and the only available CD-Drive was my old Apple's SuperDrive. Thus, I did the following steps:

1. First connect the SuperDrive.

2. Then, install the sg3-utils by:

   $ sudo apt-get install sg3-utils
   

3. Then, to identify where the SuperDrive is use:

   $ ls -lt | less | grep sr
   
    brw-rw----+ 1 root  cdrom      11,   1 jun 26 09:55 sr1
    lrwxrwxrwx  1 root  root             3 jun 26 09:32 cdrw -> sr0
    lrwxrwxrwx  1 root  root             3 jun 26 09:32 dvdrw -> sr0
    lrwxrwxrwx  1 root  root             3 jun 26 09:32 cdrom -> sr0
    lrwxrwxrwx  1 root  root             3 jun 26 09:32 dvd -> sr0
    brw-rw----+ 1 root  cdrom      11,   0 jun 26 09:32 sr0
   

   choose that with a b in the details of file, in my case is sr1

4. Then you need to have a CD or DVD ready on the device, please do not push the CD if you try it the Drive will not allowed, the send this code to initialize the Super Drive

   $ sg_raw /dev/sr1 EA 00 00 00 00 00 01 
   

   and magically the SuperDrive will introduce the CD and the drive can be used.

However, this procedure has to be repeated after you boot the system again.

Is there a method or procedure to do it easier ?

My computer is stuck at a black screen with cursor before logging in. After booting into Ubuntu 20.04 nothing is working, even the cursor is not moving. It's freezing. I also tried Ctrl+Alt+F4, but it's not opening the terminal. When I restart the system and in grub menu select Advanced options for Ubuntu and select Recovery mode, the recovery mode is not working either. It's stuck. Only the old recovery mode is working. How to fix this problem?

During the OS installation I think I have selected the option to install third-party drivers, firmware, codecs, etc., but I'm not sure.

Hardware specs:

• Intel Core i7
• Nvidia Gtx 1060
• 16 GB RAM
• 1TB NVMe SSD

I have this consistent problem, since Ubuntu 16... The camera on my laptop is just not working.

I have this problem since 4 years, I tried every solution google has, and i check regularly for any new solutions. nothing works!!

I currently have a fresh and clean installation of Ubuntu 20.04.1 My Laptop is a Lenovo ideapad, the camera is Easycamera

• cheese is saying "There was an error playing video from the webcam" -

  "Failed to allocate required memory.: gstv4l2src.c(660): gst_v4l2src_decide_allocation (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin20/GstV4l2Src:v4l2src3: Buffer pool activation failed"

• vlc is saying "v4l2 demux error: cannot start streaming: Protocol error"

• zoom just lags on a black screen.

I also see some blinks from the led next to the camera when i try to use it. but never an image. the camera is working and valid.

Some general outputs:

• sudo lshw
• lsmod | grep uvcvideo
• v4l2-ctl --list-devices
• ls -ltrh /dev/video*
• dmesg | grep -i camera
• dmesg | grep -i 1-5
• sudo v4l2-ctl -d /dev/video1 --all
• sudo v4l2-compliance -d /dev/video1

$ sudo lshw

*-usb:2
                   description: Video
                   product: EasyCamera
                   vendor: AzureWave
                   physical id: 5
                   bus info: usb@1:5
                   version: 16.04
                   serial: 0001
                   capabilities: usb-2.00
                   configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s

$ lsmod | grep uvcvideo
uvcvideo               98304  0
videobuf2_vmalloc      20480  1 uvcvideo
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_common       53248  2 videobuf2_v4l2,uvcvideo
videodev              237568  4 videobuf2_v4l2,v4l2loopback_dc,uvcvideo,videobuf2_common
mc                     57344  4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common

because my camera is not working i am using my phone camera through Droidcam...

$ v4l2-ctl --list-devices
Droidcam (platform:v4l2loopback_dc-000):
    /dev/video0

EasyCamera: EasyCamera (usb-0000:00:14.0-5):
    /dev/video1
    /dev/video2

ls -ltrh /dev/video*
crw-rw----+ 1 root video 81, 0 Jan  9 21:02 /dev/video0
crw-rw----+ 1 root video 81, 2 Jan  9 21:02 /dev/video2
crw-rw----+ 1 root video 81, 1 Jan  9 21:02 /dev/video1

When i start my computer this is the output
$ dmesg | grep -i camera
[    2.029718] usb 1-5: Product: EasyCamera
[    2.729222] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[    2.734513] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input10

and

$ dmesg | grep -i 1-5
[    1.839392] usb 1-5: new high-speed USB device number 4 using xhci_hcd
[    2.029707] usb 1-5: New USB device found, idVendor=13d3, idProduct=5673, bcdDevice=16.04
[    2.029717] usb 1-5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[    2.029718] usb 1-5: Product: EasyCamera
[    2.029720] usb 1-5: Manufacturer: AzureWave
[    2.029721] usb 1-5: SerialNumber: 0001
[    2.734513] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input10
[  488.765312] usb 1-5: USB disconnect, device number 4
[  489.148174] usb 1-5: new high-speed USB device number 6 using xhci_hcd
[  489.342853] usb 1-5: New USB device found, idVendor=13d3, idProduct=5673, bcdDevice=16.04
[  489.342856] usb 1-5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[  489.342859] usb 1-5: Product: EasyCamera
[  489.342861] usb 1-5: Manufacturer: AzureWave
[  489.342863] usb 1-5: SerialNumber: 0001

but after i try to use my camera i get repeated outputs (maybe its a clue):

 dmesg | grep -i camera
[    2.029718] usb 1-5: Product: EasyCamera
[    2.729222] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[    2.734513] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input10
[  489.342859] usb 1-5: Product: EasyCamera
[  489.348052] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[  489.353594] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input20
[  526.011437] usb 1-5: Product: EasyCamera
[  526.018596] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[  526.024153] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input21
[  576.650603] usb 1-5: Product: EasyCamera
[  576.654826] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[  576.662541] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input22
[  582.143837] usb 1-5: Product: EasyCamera
[  582.148263] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[  582.154765] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input23

$ sudo v4l2-ctl -d /dev/video1 --all
Driver Info:
    Driver name      : uvcvideo
    Card type        : EasyCamera: EasyCamera
    Bus info         : usb-0000:00:14.0-5
    Driver version   : 5.8.18
    Capabilities     : 0x84a00001
        Video Capture
        Metadata Capture
        Streaming
        Extended Pix Format
        Device Capabilities
    Device Caps      : 0x04200001
        Video Capture
        Streaming
        Extended Pix Format
Media Driver Info:
    Driver name      : uvcvideo
    Model            : EasyCamera: EasyCamera
    Serial           : 0001
    Bus info         : usb-0000:00:14.0-5
    Media version    : 5.8.18
    Hardware revision: 0x00001604 (5636)
    Driver version   : 5.8.18
Interface Info:
    ID               : 0x03000002
    Type             : V4L Video
Entity Info:
    ID               : 0x00000001 (1)
    Name             : EasyCamera: EasyCamera
    Function         : V4L2 I/O
    Flags         : default
    Pad 0x01000007   : 0: Sink
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
    Width/Height      : 1280/720
    Pixel Format      : 'MJPG' (Motion-JPEG)
    Field             : None
    Bytes per Line    : 0
    Size Image        : 1843200
    Colorspace        : sRGB
    Transfer Function : Default (maps to sRGB)
    YCbCr/HSV Encoding: Default (maps to ITU-R 601)
    Quantization      : Default (maps to Full Range)
    Flags             : 
Crop Capability Video Capture:
    Bounds      : Left 0, Top 0, Width 1280, Height 720
    Default     : Left 0, Top 0, Width 1280, Height 720
    Pixel Aspect: 1/1
Selection Video Capture: crop_default, Left 0, Top 0, Width 1280, Height 720, Flags: 
Selection Video Capture: crop_bounds, Left 0, Top 0, Width 1280, Height 720, Flags: 
Streaming Parameters Video Capture:
    Capabilities     : timeperframe
    Frames per second: 30.000 (30/1)
    Read buffers     : 0
                     brightness 0x00980900 (int)    : min=0 max=100 step=1 default=50 value=50
                       contrast 0x00980901 (int)    : min=0 max=100 step=1 default=50 value=50
                     saturation 0x00980902 (int)    : min=0 max=100 step=1 default=50 value=50
                            hue 0x00980903 (int)    : min=0 max=100 step=1 default=50 value=50
 white_balance_temperature_auto 0x0098090c (bool)   : default=1 value=1
                          gamma 0x00980910 (int)    : min=0 max=100 step=1 default=50 value=50
           power_line_frequency 0x00980918 (menu)   : min=0 max=2 default=1 value=1
                0: Disabled
                1: 50 Hz
                2: 60 Hz
      white_balance_temperature 0x0098091a (int)    : min=2500 max=6500 step=10 default=4500 value=4500 flags=inactive
                      sharpness 0x0098091b (int)    : min=0 max=100 step=1 default=50 value=50
         backlight_compensation 0x0098091c (int)    : min=0 max=2 step=1 default=0 value=0
         exposure_auto_priority 0x009a0903 (bool)   : default=0 value=1

$ sudo v4l2-compliance -d /dev/video1 
v4l2-compliance SHA: not available, 64 bits

Compliance test for uvcvideo device /dev/video1:

Driver Info:
    Driver name      : uvcvideo
    Card type        : EasyCamera: EasyCamera
    Bus info         : usb-0000:00:14.0-5
    Driver version   : 5.8.18
    Capabilities     : 0x84a00001
        Video Capture
        Metadata Capture
        Streaming
        Extended Pix Format
        Device Capabilities
    Device Caps      : 0x04200001
        Video Capture
        Streaming
        Extended Pix Format
Media Driver Info:
    Driver name      : uvcvideo
    Model            : EasyCamera: EasyCamera
    Serial           : 0001
    Bus info         : usb-0000:00:14.0-5
    Media version    : 5.8.18
    Hardware revision: 0x00001604 (5636)
    Driver version   : 5.8.18
Interface Info:
    ID               : 0x03000002
    Type             : V4L Video
Entity Info:
    ID               : 0x00000001 (1)
    Name             : EasyCamera: EasyCamera
    Function         : V4L2 I/O
    Flags         : default
    Pad 0x01000007   : 0: Sink

Required ioctls:
    test MC information (see 'Media Driver Info' above): OK
    test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
    test second /dev/video1 open: OK
    test VIDIOC_QUERYCAP: OK
    test VIDIOC_G/S_PRIORITY: OK
    test for unlimited opens: OK

Debug ioctls:
    test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
    test VIDIOC_LOG_STATUS: OK (Not Supported)

Input ioctls:
    test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
    test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
    test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
    test VIDIOC_ENUMAUDIO: OK (Not Supported)
    test VIDIOC_G/S/ENUMINPUT: OK
    test VIDIOC_G/S_AUDIO: OK (Not Supported)
    Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
    test VIDIOC_G/S_MODULATOR: OK (Not Supported)
    test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
    test VIDIOC_ENUMAUDOUT: OK (Not Supported)
    test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
    test VIDIOC_G/S_AUDOUT: OK (Not Supported)
    Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
    test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
    test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
    test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
    test VIDIOC_G/S_EDID: OK (Not Supported)

Control ioctls (Input 0):
        fail: v4l2-test-controls.cpp(216): missing control class for class 00980000
        fail: v4l2-test-controls.cpp(253): missing control class for class 009a0000
    test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: FAIL
    test VIDIOC_QUERYCTRL: OK
        warn: v4l2-test-controls.cpp(442): s_ctrl returned EILSEQ
    test VIDIOC_G/S_CTRL: OK
        warn: v4l2-test-controls.cpp(691): s_ext_ctrls returned EILSEQ
        warn: v4l2-test-controls.cpp(715): g_ext_ctrls(0) invalid error_idx 0
        warn: v4l2-test-controls.cpp(766): s_ext_ctrls returned EILSEQ
        warn: v4l2-test-controls.cpp(782): error_idx should be equal to count
        warn: v4l2-test-controls.cpp(803): error_idx should be equal to count
        fail: v4l2-test-controls.cpp(808): doioctl(node, VIDIOC_G_EXT_CTRLS, &ctrls)
    test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
    test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
    test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
    Standard Controls: 11 Private Controls: 0

Format ioctls (Input 0):
    test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
        warn: v4l2-test-formats.cpp(1327): S_PARM is supported but doesn't report V4L2_CAP_TIMEPERFRAME
        fail: v4l2-test-formats.cpp(1229): node->has_frmintervals && !cap->capability
    test VIDIOC_G/S_PARM: FAIL
    test VIDIOC_G_FBUF: OK (Not Supported)
    test VIDIOC_G_FMT: OK
    test VIDIOC_TRY_FMT: OK
        warn: v4l2-test-formats.cpp(976): Could not set fmt2
    test VIDIOC_S_FMT: OK
    test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
    test Cropping: OK (Not Supported)
    test Composing: OK (Not Supported)
    test Scaling: OK (Not Supported)

Codec ioctls (Input 0):
    test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
    test VIDIOC_G_ENC_INDEX: OK (Not Supported)
    test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

Buffer ioctls (Input 0):
    test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
    test VIDIOC_EXPBUF: OK
        fail: v4l2-test-buffers.cpp(1833): ret != EINVAL && ret != EBADR && ret != ENOTTY
    test Requests: FAIL

Total for uvcvideo device /dev/video1: 45, Succeeded: 41, Failed: 4, Warnings: 8

I can provide more necessary info..

Thanks for any pointers or solutions.

A few days ago, most full screen games launched via Steam began showing the title bar no matter what settings I have configured. I am not sure what would have changed to cause this to start happening. It seems that games running with Proton work as expected, but games with native Linux clients show the title bar.

I am running a 3 monitor set up (left=1920x1080, center=3840x2160, right=3840x2160) running with a GeForce RTX 2070 Super on the Nvidia v455 drivers.

:~$ xrander

Screen 0: minimum 8 x 8, current 9600 x 2160, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+0+451 (normal left inverted right x axis y axis) 521mm x 293mm
   1920x1080     60.00*+  59.94    50.00  
   1680x1050     59.95  
   1440x900      59.89  
   1440x576      50.00  
   1440x480      59.94  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1280x720      60.00    59.94    50.00  
   1152x864      75.00  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    72.81    59.93    59.94  
DP-2 connected primary 3840x2160+1920+0 (normal left inverted right x axis y axis) 600mm x 340mm
   3840x2160     60.00*+  30.00  
   2560x1440     59.95  
   1920x1080     60.00    59.94  
   1600x900      60.00  
   1280x1024     60.02  
   1280x800      59.81  
   1280x720      60.00    59.94  
   1152x864      59.96  
   1024x768      60.00  
   800x600       60.32  
   720x480       59.94  
   640x480       59.94    59.93  
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 connected 3840x2160+5760+0 (normal left inverted right x axis y axis) 600mm x 340mm
   3840x2160     60.00*+  30.00  
   2560x1440     59.95  
   1920x1080     60.00    59.94  
   1600x900      60.00  
   1280x1024     60.02  
   1280x800      59.81  
   1280x720      60.00    59.94  
   1152x864      59.96  
   1024x768      60.00  
   800x600       60.32  
   720x480       59.94  
   640x480       59.94    59.93  
DP-5 disconnected (normal left inverted right x axis y axis)
USB-C-0 disconnected (normal left inverted right x axis y axis)

As mentioned, a few days ago I was able to run games full screen as expected. Things I've tried:

• Downgrading the nvidia drivers to version 450
• Launching with the '-fullscreen' launch option
• Setting nvidia_drm modeset=1
• Forcing Composition Pipeline
• Enabling 'auto-hide dock' as suggested by RingGamesCompany

I am out of ideas. If anyone with more experience than I has any ideas, or if there's any additional information I can supply, I'm happy to do so.

I'm new to Ubuntu 18.04 LTS. I found a lot of problem in it after installation. Not a major problem, but I wish to rectify them.

Brightness problem:
I tried to change the brightness using keyboard hotkeys and the slider in the top of the screen. Both are not working. I tried to change grub by GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" but it does worked for me

Screen Resolution:
In the settings it doesnt show any options. The only option it shows is 1024x786(4:3). I'm using a 15.6" Laptop. I'm attaching a screenshot for reference

Graphics card:
I have an Nvidia GeForce Gtx 1650Ti dedicated graphics card. I also installed the latest 450 graphics driver.

Driver installed:

Graphics details:

When I use gazebo I can feel it is very slow while using like adding new world, so I checked the system details it shows System Config.

I tried different solution provided in internet nothing worked.

I'm using an HP Pavilion gaming laptop 15-ec1050AX/

Please provide me a solution to resolve these issues you can reach me through my email bupeshkam@gmail.com .

I am running ubuntu 20.04 on an old HP desktop. it works really well except when I shut down (sudo poweroff), it is hung displaying an ubuntu logo. I tried to follow a few related threads but no luck.

I had run other flavors of linux on the same desktop in the past, for example proxmox and it used to shutdown properly.

Am I missing something?

References,

Ubuntu 18.04 stuck at shutdown ubuntu won't shutdown or freezes at splash screen

I shut down my PC, but it stuck at Reached target shutdown/reboot.

[  OK  ] Stopped target Sockets.
[  OK  ] Closed ACPID Listen Socket.
[  OK  ] Closed Avahi mDNS/DNS-SD Stack Activation Socket.
[  OK  ] Closed CUPS Scheduler.
[  OK  ] Closed D-Bus System Message Bus Socket.
[  OK  ] Closed Socket activation for snapd daemon.
[  OK  ] Closed Syslog Socket.
[  OK  ] Closed UUID daemon activation socket.
[  OK  ] Stopped target System Initialization.
[  OK  ] Stopped target Local Encrypted Volumes.
[  OK  ] Stopped Dispatch Password Requests to Console Directory Watch.
[  OK  ] Stopped Forward Password Requests to Wall Directory Watch.
[  OK  ] Stopped Apply Kernel Variables.
[  OK  ] Stopped Load Kernel Modules.
[  OK  ] Stopping Network Time Synchronization...
[  OK  ] Stopping Update UTMP about System Boot/Shutdown...
[  OK  ] Stopped Network Time Synchronization.
[  OK  ] Stopped Update UTMP about System Boot/Shutdown.
[  OK  ] Stopped Create Volatile Files and Directories.
[  OK  ] Stopped target Local File Systems.
         Unmounting /boot/efi.
         Unmounting /run/snapd/ns/canonical-livepatch.mnt...
         Unmounting /run/snapd/ns/snap-store.mnt...
         Unmounting Mount unit for canonical-livepatch, revision 95...
         Unmounting Mount unit for core, revision 9665...
         Unmounting Mount unit for core18, revision 1705...
         Unmounting Mount unit for core20, revision 634...
         Unmounting Mount unit for gnome-3-34-1804, revision 24...
         Unmounting Mount unit for gtk-common-themes, revision 1506...
         Unmounting Mount unit for snap-store, revision 433...
         Unmounting Mount unit for snapd, revision 7264...
         Unmounting Mount unit for telegram-desktop, revision 2064...
[  OK  ] Unmounted /boot/efi.
[  OK  ] Unmounted /run/snapd/ns/canonical-livepatch.mnt.
[  OK  ] Unmounted /run/snapd/ns/snap-store.mnt.
[  OK  ] Stopped File System Check on /dev/disk/by-uuid/DEB1-D20E.
[  OK  ] Removed slice system-systemd\x2dfsdck.slice.
[  OK  ] Unmounted /run/snapd/ns.
[  OK  ] Stopped target Swap.
[  OK  ] Deactivating swap /swapfile...
[  OK  ] Unmounted Mount unit for canonical-livepatch, revision 95.
[  OK  ] Deactivated swap /swapfile.
[  OK  ] Unmounted Mount unit for core, revision 9665.
[  OK  ] Unmounted Mount unit for core18, revision 1705.
[  OK  ] Unmounted Mount unit for core20, revision 634.
[  OK  ] Unmounted Mount unit for gnome-3-34-1804, revision 24.
[  OK  ] Unmounted Mount unit for gtk-common-themes, revision 1506.
[  OK  ] Unmounted Mount unit for snap-store, revision 433.
[  OK  ] Unmounted Mount unit for snapd, revision 7264.
[  OK  ] Unmounted Mount unit for telegram-desktop, revision 2064.
[  OK  ] Stopped target Local File Systems (Pre).
[  OK  ] Reached target Unmount All Filesystems.
[  OK  ] Stopped Create Static Device Nodes in /dev.
[  OK  ] Stopped target System Users.
[  OK  ] Stopped Remount Root and Kernel File Systems.
[  OK  ] Reached target Shutdown.
[  OK  ] Reached target Final Step.
[  OK  ] Finished Reboot.
[  OK  ] Reached target Reboot.
301.666931] systemd-udevd[446]: INT3450:00: Worker [486] processing SEQNUM=4270 killed
301.666963] systemd-udevd[446]: INT3450:00: Worker [486] processing SEQNUM=4422 killed
301.672251] systemd-udevd[446]: INT3450:00: Worker [486] terminated by signal 9 (KILL)
301.682043] systemd-udevd[446]: Worker [486] terminated by signal 9 (KILL)
301.682535] systemd-udevd[446]: INT3450:00: Worker [486] failed

Below is the journal log when I run journalctl -b -p err:

-- Logs begin at Thu 2020-08-06 20:32:59 +07, end at Fri 2020-08-07 23:17:32 +07. --

Thg 8 07 23:14:11 Joker kernel: BUG: unable to handle page fault for address: ffffa2220091ffff
Thg 8 07 23:14:11 Joker kernel: #PF: supervisor read access in kernel mode
Thg 8 07 23:14:11 Joker kernel: #PF: error_code(0x0000) - not-present page
Thg 8 07 23:14:12 Joker kernel: nvidia-gpu 0000:01:00.3: i2c timeout error e0000000
Thg 8 07 23:14:12 Joker kernel: ucsi_ccg 0-0008: i2c_transfer failed -110
Thg 8 07 23:14:12 Joker kernel: ucsi_ccg 0-0008: ucsi_ccg_init failed - -110
Thg 8 07 23:16:55 Joker gdm-password][1601]: gkr-pam: unable to locate daemon control file
Thg 8 07 23:17:11 Joker systemd-udevd[466]: INT3450:00: Worker [512] processing SEQNUM=4314 killed
Thg 8 07 23:17:11 Joker systemd-udevd[466]: INT3450:00: Worker [495] processing SEQNUM=4477 killed
Thg 8 07 23:17:11 Joker systemd-udevd[466]: INT3450:00: Worker [512] failed
Thg 8 07 23:17:11 Joker systemd-udevd[466]: INT3450:00: Worker [495] failed

I tried to reinstall the graphics driver, but it still does not work.

Additional Drivers:

Results of free -h:

total        used        free      shared  buff/cache   available
Mem:           31Gi       2,2Gi        27Gi       131Mi       1,6Gi        28Gi
Swap:         2,0Gi          0B       2,0Gi

Command: swapon -show:

Filename                Type        Size    Used    Priority
/swapfile                               file        2097148 0   -2

Command: grep -i swap /etc/fstab:

/swapfile                                 none            swap    sw              0       0

Command: sudo lshw -C memory:

*-firmware                
       description: BIOS
       vendor: American Megatrends Inc.
       physical id: 0
       version: 0808
       date: 05/14/2020
       size: 64KiB
       capacity: 16MiB
       capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer acpi usb biosbootspecification uefi
  *-memory
       description: System Memory
       physical id: 44
       slot: System board or motherboard
       size: 32GiB
     *-bank:0
          description: [empty]
          physical id: 0
          slot: ChannelA-DIMM1
     *-bank:1
          description: DIMM DDR4 Synchronous 2666 MHz (0,4 ns)
          product: F4-3000C16-16GTZR
          vendor: G-Skill
          physical id: 1
          serial: 00000000
          slot: ChannelA-DIMM2
          size: 16GiB
          width: 64 bits
          clock: 2666MHz (0.4ns)
     *-bank:2
          description: [empty]
          physical id: 2
          slot: ChannelB-DIMM1
     *-bank:3
          description: DIMM DDR4 Synchronous 2666 MHz (0,4 ns)
          product: F4-3000C16-16GTZR
          vendor: G-Skill
          physical id: 3
          serial: 00000000
          slot: ChannelB-DIMM2
          size: 16GiB
          width: 64 bits
          clock: 2666MHz (0.4ns)
  *-cache:0
       description: L1 cache
       physical id: 51
       slot: L1 Cache
       size: 384KiB
       capacity: 384KiB
       capabilities: synchronous internal write-back unified
       configuration: level=1
  *-cache:1
       description: L2 cache
       physical id: 52
       slot: L2 Cache
       size: 1536KiB
       capacity: 1536KiB
       capabilities: synchronous internal write-back unified
       configuration: level=2
  *-cache:2
       description: L3 cache
       physical id: 53
       slot: L3 Cache
       size: 12MiB
       capacity: 12MiB
       capabilities: synchronous internal write-back unified
       configuration: level=3
  *-memory UNCLAIMED
       description: Memory controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 1f.2
       bus info: pci@0000:00:1f.2
       version: 00
       width: 32 bits
       clock: 33MHz (30.3ns)
       configuration: latency=0
       resources: memory:a2320000-a2323fff

Command: sysctl vm.swappiness:

vm.swappiness = 60

Command: sudo dmidecode -s bios-version:

0808

My PC

OS: Ubuntu 20.04.1 LTS
Kernel: Linux 5.4.0-42-generic
CPU: Intel(R) Core(TM) i5-10500 CPU @ 3.10GHz
MotherBoard: ASUS ROG STRIX B460-F GAMING Rev 1.xx
BIOS version: 0808
Memory: 02 x G-Skill F4-3000C16-16GTZR 16384 MB @ 2666MHz (DIMM DDR4)
Graphics: ASUS TUF GTX 1660 Super-6G GAMING

Update (2020-08-11):

I have updated NVIDIA to 450.57 and increased swapfile to 4GB but still error.

Command : nvidia-smi:

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 450.57       Driver Version: 450.57       CUDA Version: 11.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  GeForce GTX 166...  Off  | 00000000:01:00.0  On |                  N/A |
| 31%   39C    P8    18W / 125W |    283MiB /  5936MiB |      1%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      1018      G   /usr/lib/xorg/Xorg                 35MiB |
|    0   N/A  N/A      1639      G   /usr/lib/xorg/Xorg                 91MiB |
|    0   N/A  N/A      1841      G   /usr/bin/gnome-shell              103MiB |
|    0   N/A  N/A      2296      G   ...token=7897069570677155215       32MiB |
|    0   N/A  N/A      3216      G   /usr/lib/firefox/firefox            2MiB |
|    0   N/A  N/A      3777      G   /usr/lib/firefox/firefox            2MiB |
+-----------------------------------------------------------------------------+

Command: journalctl -b -p err:

-- Logs begin at Thu 2020-08-06 20:32:59 +07, end at Tue 2020-08-11 21:02:57 +07. --
Thg 8 11 21:01:46 Joker kernel: BUG: unable to handle page fault for address: ffffb1084094ffff
Thg 8 11 21:01:46 Joker kernel: #PF: supervisor read access in kernel mode
Thg 8 11 21:01:46 Joker kernel: #PF: error_code(0x0000) - not-present page
Thg 8 11 21:01:47 Joker kernel: nvidia-gpu 0000:01:00.3: i2c timeout error e0000000
Thg 8 11 21:01:47 Joker kernel: ucsi_ccg 0-0008: i2c_transfer failed -110
Thg 8 11 21:01:47 Joker kernel: ucsi_ccg 0-0008: ucsi_ccg_init failed - -110
Thg 8 11 21:02:38 Joker gdm-password][1535]: gkr-pam: unable to locate daemon control file

Solution

I found this article. I have updated kernel to the latest version 5.8 and it's working.

18.04 Ubuntu and 9.13 x11vnc installed. I'm trying to set up my PC so I can VNC into my current session and have x11vnc run at startup. If I don't set a password I can vnc into my PC's current session fine on port 5900. When I set a password I cannot connect in. I can however connect into a new session on port 5901 which is not what I want.

On top of that, when I try create a service file to run at startup, I get a failed to start x11vnc message.

I'm using this blog: http://c-nergy.be/blog/?p=12220 as my guide.

Below is the output I get when I try to start the service:

user@ubuntu-pc:/lib/systemd/system$ sudo systemctl enable x11vnc.service
user@ubuntu-pc:/lib/systemd/system$ sudo systemctl daemon-reload
user@ubuntu-pc:/lib/systemd/system$ sudo systemctl start x11vnc.service
user@ubuntu-pc:/lib/systemd/system$ sudo systemctl status x11vnc.service
● x11vnc.service - "x11vnc"
   Loaded: loaded (/etc/systemd/system/x11vnc.service; enabled; vendor preset: enabled)
  Active: failed (Result: exit-code) since Fri 2018-10-05 10:22:06 EDT; 1s ago
 Process: 7446 ExecStart=/usr/bin/x11vnc -xkb -noxrecord -noxfixes -noxdamage -display :0 -auth guess -rfbauth /etc/x11vnc.pass (code=exited,     status=1/FAILURE)
Main PID: 7446 (code=exited, status=1/FAILURE)

Oct 05 10:22:06 ubuntu-pc systemd[1]: x11vnc.service: Service hold-off time over, scheduling restart.
Oct 05 10:22:06 ubuntu-pc systemd[1]: x11vnc.service: Scheduled restart job, restart counter is at 5.
Oct 05 10:22:06 ubuntu-pc systemd[1]: Stopped "x11vnc".
Oct 05 10:22:06 ubuntu-pc systemd[1]: x11vnc.service: Start request repeated too quickly.
Oct 05 10:22:06 ubuntu-pc systemd[1]: x11vnc.service: Failed with result 'exit-code'.
Oct 05 10:22:06 ubuntu-pc systemd[1]: Failed to start "x11vnc".

Any help is appreciated.

Edit 1 When I attempt to VNC in I get "connection attempt refused" then I run x11vnc and VNC in at port 5900 with no password, then I can see my current screen. After running x11vnc -storepasswd /home/ then x11vnc -rfbauth /home/hudsona/.vnc/passwd I can VNC into my current session with a password.

This question helped me out: https://unix.stackexchange.com/questions/405185/password-problem-x11vnc

Edit 2 After creating that .desktop file from the question I linked in Edit 1, I can reboot, log in then VNC from another machine on port 5900 and get in. Without logging in I can VNC in from another machine on port 5901 but on my VNC viewer all I get is a grey checkered screen with an "X" mouse cursor.

Everyone!

I'm a totally beginner for Raspberry Pi.

Now I 'm trying to connect raspberry pi 3B with Ubuntu 16.04 LTS Server to the ethernet and wifi. However the etheret and wifi can not recognized.

1.First This is My Software and Hardware Device

・Software(OS): Ubuntu 16.04 LTS Server(Not GUI, it is CLI)

・Hardware:

   (a)Raspberry Pi 3B

   (b)Lan Cable 

   (C)Pocket Wifi with Wifi to Ethernet Adapter(using lan cable to connect to the raspberry pi 3B) 
      (c-1)Pocket Wifi:  Speed Wi-Fi NEXT W03　HWD34<br>
      (c-2)Wifi to Ethernet Adapter: HWD34 PUA <br> 

Official Ubuntu 16.04 Server images:

・Raspberry Pi 3B: ubuntu-16.04-preinstalled-server-armhf+raspi.img.xz

⇒OS Download from here ↓

http://www.finnie.org/software/raspberrypi/ubuntu-rpi3/ubuntu-16.04-preinstalled-server-armhf+raspi.img.xz

2.Second These are the Result of the Command

==<Ehternet>=======================================

$ sudo ip addr show eth0

• Image:Evidence1_sudo ip addr show eth0

sudo: unable to resolve host ubuntu: Connection Refused
2: eth0: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether b8:27:eb:6c:ff:76 brd ff:ff:ff:ff:ff:ff
inet6 2001:268:c005:1e0b:ba27:ebff:fe6c:ff76/64 scope global mngtmpaddr dynamic
      valid_lft 7176sec preferred_lft 3576sec
inet6 fe80::ba27:ebff:fe6c:ff76/64 scope link
      valid_lft forever preferred_lft forever

$ sudo ifconfig -a

• Image:Evidence2_sudo ifconfig -a

sudo: unable to resolve host ubuntu: Connection Refused
eth0     Link encap:Ethernet  HWaddr  b8:27:eb:6c:ff:76
inet6 addr:inet6 fe80::ba27:ebff:fe6c:ff76/64 Scope:Link inet6 addr:2001:268:c005:1e0b:ba27:ebff:fe6c:ff76/64:Global UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

lo     Link encap: Loopback
inet addr:127.0.01 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
...

$sudo vi /etc/network/interfaces

     "There is file, but the content is nothing!!"

$sudo ifdown eth0

sudo: unable to resolve host ubuntu: Connection Refused Killed old client process Internet Systems Consortium DHCP Client 4.3.3
...
Listening on LPF/eth0/b8:27:eb:6c:ff:76
Sending on LPF/eth0/b8:27:eb:6c:ff:76
Sending on Socket/fallback

$sudo ifup eth0

• Image:Evidence3_$sudo ifup eth0

sudo: unable to resolve host ubuntu: Connection Refused
...

Listening on LPF/eth0/b8:27:eb:6c:ff:76
Sending on LPF/eth0/b8:27:eb:6c:ff:76
Sending on Socket/fallback

DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xe8cd0311)
...

NO DHCPOFFERS received.
No working leases in persistent database - sleeping.

==<Wifi>=======================================

$ iwconfig

The program 'iwconfig' is currently not installed. You can install it by typing:
sudo apt install wireless-tools

$ sudo apt install wireless-tools

• Image:Evidence4_$ sudo apt install wireless-tools
  

sudo: unable to resolve host ubuntu: Connection Refused
Reading Package lists... Done The following additional package will be installed:
libiw30
The following additional package will be installed:
libiw30 wireless-tools
...

Err1:1 http: //ports.ubuntu.com/ubuntu-ports xenial/main armhf libiw30 armhf 30~pre9-8ubuntu1
Err:2 http://ports.ubuntu.com/ubuntu-ports xenial/main armhf wireless-tools armhf 30~pre9-8ubuntu1

E: Failured to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/w/wireless-tools/wirelss-tools/wireless-tools/wireless-tools_30~pre9-8ubuntu_armhf.deb
Temporary failure resolving 'ports.ubuntu.com'

E:Unable to fetch some archives, maybe run apt-get update or try with --fix-missing

$ sudo apt-get update

• Image:Evidence5_$ sudo apt-get update

sudo: unable to resolve host ubuntu: Connection Refused
Err1:...
Temporary failure resolving 'ports.ubuntu.com'
Err2:...

$sudo ifdown wlan0

sudo: unable to resolve host ubuntu: Connection Refused
Unknown interface wlan0

$sudo ifup wlan0

sudo: unable to resolve host ubuntu: Connection Refused
Unknown interface wlan0

3.Third What is About the Ethernet

This time I'm using Pocket Wifi to Ethernet Adapter connecting to the raspberry pi 3B by lan cable.

However, when I plug eletronic cord and start the raspbarry pi OS, The first line on the start-up image will show

"Net: Net initialization Skipped
No ethernet found
starting USB..."

Thanks for all your help!

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn't even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

• sudo apt-get purge '*-nvidia-*'
• removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
• sudo update-initramfs -u
• sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
• There was no /etc/X11/xorg.conf to remove or to modify
• reboot

However then lspci -nnk | grep -iA2 vga returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn't recognize any external monitor even on mini-dp. I just realized that even VGA doesn't work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?

I'm trying to install libglut.so.3 that is required by an application. I have installed freeglut3, freeglut3-dev, but again same error as the title of this question.

I have searched then with a sudo apt search glut and nothing new is coming out.

Doing a sudo find / -type f | grep libglut.so.3 I can see this:

find: ‘/run/user/1000/gvfs’: Permission denied
/usr/lib/x86_64-linux-gnu/libglut.so.3.9.0

Now, even if I have installed freeglut3 and the -dev one, still get same error.

I'm thinking now to try to link in some way the libglut.so.3.9.o that I see under /usr/lib/x86_64-linux-gnu/ but don't know how to do it or if it works.

Why I still get error libglut.so.3: cannot open shared object file: No such file or directory ? How can I fix this? Where are located all shared libraries that is looking for?

Thanks so much, this is becoming a pain in the neck since weeks now, so I decided to write to all of you.

My system is a 32bit i5 4GB ram

Description: Ubuntu 16.04.3 LTS Release: 16.04 Codename: xenial

Again same problem with libcv.so.4 now. Installed libcv, libcvaux, -dev, :i386 doesn't work.

Can't find version 4 of libcv, only 2.4.

How do I know where to pick the libraries from? just doing apt search doesn't help very much.

A find outputs this:

sudo find / -type f | grep libcv
find: ‘/run/user/1000/gvfs’: Permission denied
/var/lib/dpkg/info/libcv2.4.md5sums
/var/lib/dpkg/info/libcvaux-dev:amd64.md5sums
/var/lib/dpkg/info/libcv2.4.list
/var/lib/dpkg/info/libcv-dev:amd64.md5sums
/var/lib/dpkg/info/libcv-dev:amd64.list
/var/lib/dpkg/info/libcvaux-dev:amd64.list
/usr/lib/vlc/plugins/codec/libcvdsub_plugin.so
/usr/share/doc/libcv2.4/copyright
/usr/share/doc/libcvaux-dev/copyright
/usr/share/doc/libcv-dev/copyright
/usr/share/lintian/overrides/libcv2.4

Thinking about some symbolic link to /usr/share/lintian/overrides/libcv2.4?

I have a QEMU/KVM virtual machine created with Virtual Machine Manager.

I would like to be able to copy text on the host and paste it into the guest, and the other way around too.

How can I share the clipboard between the host and the guest?

I see that I can mount a Mount Mac OS Extended Journaled Filesystem on Ubuntu (it seems, after disabling journaling), and that I can share resources on the network via AFP using netatalk.

My question is -- can I take a disk with an existing Mac OS Extended filesystem, mount it on a server running Ubuntu 16.04 after disabling journaling, and make that filesystem available to Mac's on my network via AFP using netatalk?

Thanks so much!

When I try to run the emulator on Android studio it prints

PANIC: ANDROID_SDK_HOME is defined but could not find Nexus_5_API_23_x86.ini file in $ANDROID_SDK_HOME/.android/avd
Note: The environment variable $ANDROID_SDK_HOME is set, and the emulator uses that variable to locate AVDs.
This may result in the emulator failing to start if it cannot find the AVDs in the folder pointed to by the
given environment variable.
ANDROID_SDK_HOME=/home/lavi/android-sdk

Note: avd is searched in the order of $ANDROID_AVD_HOME,$ANDROID_SDK_HOME/.android/avd and $HOME/.android/avd

Please tell me steps: How to move the files and set sdk in ubuntu 14.04?

Thanks.

I have the same issue as here, lspci doesn't show it. dmidecode says the PCIE x1 slot (the only PCIE x1 slot on my mother board) is available (i.e. doesn't say its in use). The card is uPD720201/uPD720202 based and works fine on a windows system (different PC). The firmware was updated to version 2024. It is powered with molex connector. I can't see what I am doing wrong.

No where in the syslog or dmesg or kern.log there is any xhci seen with grep. Even NEC/Renesas nothing shows in these logs. Its as if my card was silently missing.

Bit more information:

$uname -a
Linux ******* 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.2 LTS"

# dmidecode 2.12
SMBIOS 2.4 present.

Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
        Manufacturer: Packard Bell BV
        Product Name: Cuba MS-7301
        Version: 1.0
        Serial Number:

Handle 0x0025, DMI type 9, 13 bytes
System Slot Information
        Designation: PCIEX16
        Type: x16 PCI Express
        Current Usage: In Use
        Length: Long
        ID: 4
        Characteristics:
                5.0 V is provided
                PME signal is supported

Handle 0x0026, DMI type 9, 13 bytes
System Slot Information
        Designation: PCIEX1_1
        Type: x1 PCI Express
        Current Usage: Available
        Length: Long
        ID: 5
        Characteristics:
                5.0 V is provided
                PME signal is supported

Even lspci -nn also doesn't show the card as opposed to what was stated here

I noticed that when I connect the same card to my other desktop (running windows and dual-booting to ubuntu 14.04.1 LTS) the dmi decode shows that my card is powered 3.3V. This is weird, I thought PCIEX_x16 & PCIEX_x1 are all common standard and common voltage. Any idea why the voltage is different, anyone please?

# dmidecode 2.12
SMBIOS 2.5 present.

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
    Manufacturer: ASUSTeK Computer INC.
    Product Name: M4A79XTD EVO
    Version: Rev X.0X
    Serial Number: MT709CK11102337
    Asset Tag: To Be Filled By O.E.M.
    Features:
        Board is a hosting board
        Board is replaceable
    Location In Chassis: To Be Filled By O.E.M.
    Chassis Handle: 0x0003
    Type: Motherboard
    Contained Object Handles: 0
# dmidecode 2.12
SMBIOS 2.5 present.

Handle 0x002C, DMI type 9, 13 bytes
System Slot Information
    Designation: PCIEX16_1
    Type: x16 PCI Express
    Current Usage: In Use
    Length: Short
    ID: 2
    Characteristics:
        3.3 V is provided
        Opening is shared
        PME signal is supported

Handle 0x002D, DMI type 9, 13 bytes
System Slot Information
    Designation: PCIEX16_2
    Type: x16 PCI Express
    Current Usage: In Use
    Length: Short
    ID: 2
    Characteristics:
        3.3 V is provided
        Opening is shared
        PME signal is supported

Handle 0x002E, DMI type 9, 13 bytes
System Slot Information
    Designation: PCIEX1_1
    Type: x1 PCI Express
    Current Usage: In Use
    Length: Short
    ID: 4
    Characteristics:
        3.3 V is provided
        Opening is shared
        PME signal is supported

Handle 0x002F, DMI type 9, 13 bytes
System Slot Information
    Designation: PCIEX1_2
    Type: x1 PCI Express
    Current Usage: Available
    Length: Short
    ID: 5
    Characteristics:
        3.3 V is provided
        Opening is shared
        PME signal is supported

Handle 0x0030, DMI type 9, 13 bytes
System Slot Information
    Designation: PCI1
    Type: 32-bit PCI
    Current Usage: Available
    Length: Short
    ID: 13
    Characteristics:
        3.3 V is provided
        Opening is shared
        PME signal is supported

Handle 0x0031, DMI type 9, 13 bytes
System Slot Information
    Designation: PCI2
    Type: 32-bit PCI
    Current Usage: In Use
    Length: Short
    ID: 14
    Characteristics:
        3.3 V is provided
        Opening is shared
        PME signal is supported

In this case lspci -nn does show the card and the card works.

02:00.0 USB controller [0c03]: Renesas Technology Corp. uPD720202 USB 3.0 Host Controller [1912:0015] (rev 02)