Duplicate cursors are appearing when taking screenshots or attaching a second monitor https://askubuntu.com/questions/1566663/duplicate-cursors-are-appearing-when-taking-screenshots-or-attaching-a-second-mo

I have a Gigabyte g5 kc laptop with an Intel Core i5 10500H and a laptop Nividia RTX3060 running Ubuntu 24.04.4.

When I take a screenshot there is a high chance that my cursor gets deposited on the screen where it was at the time of taking the screenshot and sometimes when attaching a second monitor. These cursors persist above everything until I restart sometimes they are displayed over the shutdown screen. They are also not just static images as they can react to what the current mouse is doing changing to click sprite or typing sprite. I say chance because it doesn't happen every time with screenshots. It's consistently around 50%. As for connecting a second monitor I only just noticed that happening today, so I do not know the percentage of that.

Cursor Gif

I don't think it is the graphics driver, as I changed it and the issue persisted. It also persisted whether I was on Wayland or Xorg. I also tried a bunch of screenshot tools the standard Ubuntu screenshot, GNOME Screenshot and Flameshot to name a few and they all do it.

Laptop speakers are not working https://askubuntu.com/questions/1566661/laptop-speakers-are-not-working

I installed Ubuntu 26.04 LTS, but after several attempts, there's still no sound from the speakers. I've uploaded some screenshots; could you please help me see if there's any way to resolve this? I'm completely stumped after looking at the solutions online. Thank you!

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NVIDIA sideband socket Permission denied with AMD+NVIDIA hybrid GPU on Ubuntu, GDM freezes https://askubuntu.com/questions/1566659/nvidia-sideband-socket-permission-denied-with-amdnvidia-hybrid-gpu-on-ubuntu-g

System:

  • Ubuntu 22.04, kernel 6.8.0-111
  • NVIDIA GTX 1050 (driver 535.288.01) + AMD GPU (display)
  • GDM, Xorg, prime on-demand

Problem:

Session freezes randomly. Log shows: (WW) NVIDIA: Failed to bind sideband socket to (WW) NVIDIA: '/var/run/nvidia-xdriver-xxxx' Permission denied

(EE) open /dev/fb0: Permission denied (EE) AMDGPU(0): failed to set mode: Permission denied

/var/run is owned by root:root (drwxr-xr-x), gdm cannot write there.

nvidia-persistenced runs as user nvidia-persistenced. CUDA works fine. Display output is from AMD.

NVIDIA is only accessible for CUDA compute, not display.

Question: How to properly disable NVIDIA from Xorg/GDM while keeping CUDA accessible?

apt-offline fails to download requested upgrade files https://askubuntu.com/questions/1566658/apt-offline-fails-to-download-requested-upgrade-files

Background: I am trying to revive a neglected 22.04.4 Ubuntu (Lubuntu, actually) machine that lost its network connectivity, presumably due to an upgrade effecting its Realtek PCIe Gbe network card. That's a common problem, lots of traffic on it. The solution is to downgrade the kernel, or, in my case, probably to upgrade it (most of the solutions written about it were written before there was a widely available patch). The only prior kernel patch I had available (I forget the number) failed to resolve the problem.

I am running apt-offline 1.8.5 on both the online and offline machines.

My problem isn't about the offline machine, but someone is bound to ask. The offline machine a dual boot machine. The network card works fine in Windows, and it also works fine when I boot off a live USB running 24.04, although that may be a generic driver. I'm assuming the problem's been fixed in the past two years.

The best solution seems to be apt-offline. The offline machine generates an update sig just fine, the online machine reads the update sig without issue, downloads a bunch of files and generates the desired update data. The offline machine reads the update data just fine and throws an appropriate number of green messages to the screen saying it has synced various sources. Producing the upgrade sig also looks like it proceeds normally.

The trouble comes when I try to get the data requested by the upgrade sig using the online machine. It cannot access a single file. Every one of them fails with a 403 Forbidden. The machine is connected. I am using it to write this message. It can get to the repos, because I have gone through the cycle s a few times with different options, and it can always get the upDATE information, just never the upGRADE information.

I took a look in in the upgrade sig file, copied all the source URLs into an HTML doc, and used a browser to download all of them (I was tired enough to give up on thinking but not tired enough to give up, so I just right clicked on all 320 odd links and downloaded them). Not a single one failed. It really doesn't look like a permissions issue. The URLs are reachable from the online machine and active. The file sizes are all correct.

I tried setting the cache to the folder I dumped the files to, but some of them (about 60) had names that were different from the downloaded basename and failed. The other 260 or so were zipped up into the target file successfully. I parsed the signature file and renamed all those files with basenames different from their handles in the sig file, but that had no effect (I suspect when the two names in the sig file are different, it uses some combination of the two, but includes only the basename in the verbose error messages, not what is is looking for in the cache).

The simplest thing is to figure out what's going on with the apt-offline download of the upgrade files, instead of trying to hack around it.

The command I used is:
sudo apt-offline get upgrade.sig --threads 5 --bundle upgrade.zip --verbose

A snippet (every single file looks like this) of the verbose output is (I reran it with --threads 1 to stop interleaved messages):

ERROR: Failed to download libatomic1                                                                                        
VERBOSE: Item before split is: 'http://security.ubuntu.com/ubuntu/pool/main/g/gcc-12/libquadmath0_12.3.0-1ubuntu1%7e22.04.3_amd64.deb' libquadmath0_12.3.0-1ubuntu1~22.04.3_amd64.deb 153976 MD5Sum:81479a10a57088dc284c55cbe3a96515                    
                                                                                                                            
VERBOSE: Item after split is: 'http://security.ubuntu.com/ubuntu/pool/main/g/gcc-12/libquadmath0_12.3.0-1ubuntu1%7e22.04.3_amd64.deb' libquadmath0_12.3.0-1ubuntu1~22.04.3_amd64.deb 153976 MD5Sum:81479a10a57088dc284c55cbe3a96515                     
                                                                                                                            
VERBOSE: Stripped item URL is: http://security.ubuntu.com/ubuntu/pool/main/g/gcc-12/libquadmath0_12.3.0-1ubuntu1%7e22.04.3_amd64.deb                                                                                                                    
VERBOSE: Stripped item FILE is: libquadmath0_12.3.0-1ubuntu1~22.04.3_amd64.deb                                              
VERBOSE: Stripped item SIZE is: 153976                                                                                      
VERBOSE: Stripped item CHECKSUM is: MD5Sum:81479a10a57088dc284c55cbe3a96515                                                 
VERBOSE: Thread is Thread-1 (run)                                                                                           
Downloading libquadmath0 - 150 KiB                                                                                          
VERBOSE: http://security.ubuntu.com/ubuntu/pool/main/g/gcc-12/libquadmath0_12.3.0-1ubuntu1%7e22.04.3_amd64.deb - 403 - Forbidden                                                                                                                        
VERBOSE: Will still try with other package uris                                                                             
ERROR: Failed to download libquadmath0               

The procedure I used seemed straightforward, taken straight from many examples. I might be missing something super simple. I do the update and upgrade in separate steps, specifically to avoid the desynchronization issue I've seen mentioned. Obviously, I am copying the files between computers on a USB after each step.

On offline machine: sudo apt-offline set update.sig --update
On online machine: sudo apt-offline get update.sig --threads 5 --bundle update.zip
On offline machine: sudo apt-offline install update.zip
On offline machine: sudo apt-offline set upgrade.sig --upgrade
On online machine: sudo apt-offline get upgrade.sig --thread5 --bundle upgrade.zip

That last line is where it fails, and fails on every single file. The file upgrade.zip is empty (size 0). When I use the manually downloaded results to build a cache, I'm pretty sure it has data, but I don't think a partial update is a great idea.

Ubuntu 26.04 Samba does not work, new files are not showing up in Windows client https://askubuntu.com/questions/1566657/ubuntu-26-04-samba-does-not-work-new-files-are-not-showing-up-in-windows-client

I installed the latest Ubuntu 26.04 in a virtual machine. The host OS is Windows 11.

I want to share the home directory of Ubuntu with Windows. The Samba version is:

$ smbd --version
Version 4.23.6-Ubuntu-4.23.6+dfsg-1ubuntu2

when I create a new file in Ubuntu, it doesn't show in Windows.

If I restart the smbd service with systemctl restart smbd then it does show up.

Ubuntu Clang fails to download [closed] https://askubuntu.com/questions/1566655/ubuntu-clang-fails-to-download

I am trying to install clang but ubuntu keeps saying the package isn't found or hits me with "This script must be run as root!", which wasn't mentioned in an article that seemed to address the issue. It recommended that I paste a line of test to install clang and then hit enter to confirm installation. Then it also gave a way to check if clang downloaded successfully. Unfortunately, the solution didn't work for me. I also tried changing the version number as someone else mentioned that it worked for them. However, it also didn't work when I tried it.

Ubuntu won't boot unless in very old VGA drivers https://askubuntu.com/questions/1566653/ubuntu-wont-boot-unless-in-very-old-vga-drivers

I (with the guesswork of GEMINI deep research) can not get Ubuntu 26.04 LTS to boot unless I type 'e' at the boot menu to modify the Linux line to nomodeset acpi=off. I flashed the Ubuntu ISO to a PNY 32GB USB flash drive using Rufus.

After dozens of failed attempts and countless hours trying to install Ubuntu to an SSD, I plugged the SSD into a laptop in an SSD enclosure via USB and successfully installed Ubuntu 26.04 into the HP laptop, but I never booted Ubuntu OS in the HP laptop. Then I installed the SSD directly onto the Asus motherboard. The problem is that I can not make full use of the 24GB VRAM because I can only boot into Ubuntu 26.04 with the nomodeset acpi=off option to force Ubuntu to boot with very old drivers, VGA, etc. A normal boot ends up at a solid black screen every time after the Asus splash screen unless I press the Esc key and type 'e' next to the Ubuntu option.

Apparently Ubuntu 26.04 LTS is not meant for old workstations like this.

  • System: It was built in 2018, so it's old.

  • Motherboard: ASUS PRIME X299-DELUXE II

  • CPU: Intel Core i9-9980XE (18 cores, 36 threads)

  • Graphics card: NVIDIA Titan RTX (24GB VRAM)

  • Drive: Samsung SSD 970 EVO Plus 2TB

  • BIOS: 4301

  • Intel firmware: Intel ME firmware 11.12.98.2655

  • Installation media: PNY 32GB USB 3.2 flash drive

  • Installation file: ubuntu-26.04-live-server-amd64.iso

There is signficant hiss and feedback on my mic in Ubuntu https://askubuntu.com/questions/1566652/there-is-signficant-hiss-and-feedback-on-my-mic-in-ubuntu

I have confirmed that this is not an issue with other OSs and cannot find any solution. The mic works fine on Windows and Fedora. Extreme pulsing static only in Ubuntu.

How to separate home partition when installing from a live USB in encrypted mode? https://askubuntu.com/questions/1566651/how-to-separate-home-partition-when-installing-from-a-live-usb-in-encrypted-mode

For my first time I installed Kubuntu with the encryption option using a live USB. It was automatically done creating a lvm partition and LUKS encrypted it, and it worked fine.

I had CPU load (Plasmashell process) problems on Kubuntu 25.10, and then tried to early upgrade to 26.04. It was not a good idea or I made mistakes. I really have to reinstall from a live USB (that works fine without CPU overload).

Before I always had set up /home partitions. It is the first time I have to reinstall without this security. Inside the LUKS container, I worked on lvm to separate /root and /home (yes, I made backups before), but in the installer I did not find any way to reinstall Kubuntu on the /root partition I made. It was going to take all the LUKS volume.

Do I have to understand that installing in LUKS partition does not let us the choices off partitions to use, or I did not find the way to do that?

Even if I lose everything this time, I would like to use a separate /home partition in the LUKS container for the next reinstallation in a few more years. How is this possible?

Program Download https://askubuntu.com/questions/1566649/program-download

New person here. Loaded Ubuntu 26.04 Desktop today. Checked for Windows 10 to be deleted. I took a break and when I came back, the PC still booted to WIN 10 and I had to use the Flash drive to get into Ubuntu. The motherboard battery needs replaced, could this have caused the issue?

How do I make F13 not open settings? https://askubuntu.com/questions/1566648/how-do-i-make-f13-not-open-settings

This is similar to How do I make F13 not open settings? (Ubuntu 24.04.2 LTS), but I'm in KDE now instead of GNOME, and I now have a physical F13 key on my keyboard. Every time I press it, Settings opens. This time, I don't really know what to try. How do I stop this nonsensical behaviour?

Lost internet connection on my UBUNTU server 16.04.1 LTS [closed] https://askubuntu.com/questions/1566647/lost-internet-connection-on-my-ubuntu-server-16-04-1-lts

Please help me here. I am running at home old Linux server. Recently figured out that it's services (photo sharing etc) is not working.

Checked it out and seems something went wrong with internet connection.. Etherner isstill working as I can connect to server via PuTTY soft.

UBUNTU server is running on wired connection to router(no issues there, checked).

Here is what I have got:

UBUNTU Version:

Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-96-generic x86_64)

Pinging result:

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.

From 192.168.1.100 icmp_seq=1 Destination Host Unreachable

IP addresses:

arvydas@UBUSERV:~$ ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether d4:3d:7e:f5:d2:5f brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.100/24 brd 192.168.1.255 scope global enp2s0
       valid_lft forever preferred_lft forever
    inet6 fe80::d63d:7eff:fef5:d25f/64 scope link
       valid_lft forever preferred_lft forever

Network manager:

arvydas@UBUSERV:~$ systemctl status NetworkManager
● NetworkManager.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)

arvydas@UBUSERV:~$ sudo lshw -C network
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: enp2s0
       version: 0c
       serial: d4:3d:7e:f5:d2:5f
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=192.168.1.100 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       resources: irq:26 ioport:e000(size=256) memory:f7c00000-f7c00fff memory:f0000000-f0003fff
arvydas@UBUSERV:~$ ls -al /etc/netplan
ls: cannot access '/etc/netplan': No such file or directory
Running apt upgrade run dir everyhting except I get an apache2 err at the end https://askubuntu.com/questions/1566640/running-apt-upgrade-run-dir-everyhting-except-i-get-an-apache2-err-at-the-end

whenever I run

sudo apt upgrade -y

it goes through for so many components but at the end I get

Adding boot menu entry for UEFI Firmware Settings ...

done

Processing triggers for libc-bin (2.39-0ubuntu8.7) ...

Errors were encountered while processing:

apache2

E: Sub-process /usr/bin/dpkg returned an error code (1)

After, googling, I found some info about running the following command

sudo apt-get reinstall apache2-utils

but got some warnings and errors as follows

Setting up apache2 (2.4.58-1ubuntu8.12) ...

info: Executing deferred 'a2enmod dnssd' for package libapache2-mod-dnssd

ERROR: Module dnssd does not exist!

dpkg: error processing package apache2 (--configure):

installed apache2 package post-installation script subprocess returned error exit status 1

Processing triggers for man-db (2.12.0-4build2) ...

Errors were encountered while processing: apache2

E: Sub-process /usr/bin/dpkg returned an error code (1)

when I check the directory /etc/apache2/mods-enabled, I dont find any trace for module dnssd.

Thanks for your help

how to disbale Ubuntu 26.04 emoji picker keyboard shortcut? https://askubuntu.com/questions/1566639/how-to-disbale-ubuntu-26-04-emoji-picker-keyboard-shortcut

I have a brand new fresh install of Ubuntu 26.04 on a Dell laptop. Ctrl + . ("control period") opens up the emoji picker. I would prefer to reserve Ctrl + . for other functions, for instance it is the default keystroke for my password manager to fill in passwords in a web browser; GNOME seems to override this and the emoji picker pops up. I cannot find the setting to disable the default mapping (I would like to disable emojis completely if possible). I have looked in keyboard settings and ibus-setup. Suggestions?

How do I determine what settings are shared between folders? https://askubuntu.com/questions/1566638/how-do-i-determine-what-settings-are-shared-between-folders

In Dolphin, I set “Remember display style for each foler”, because I want, say, the Images folder to use “Icons” view, whereas most other folders to use “Details” view. However, this setting doesn't just apply to things like that, and instead applies to other things like “Show Hidden Files” and “Hidden Files Last”. How do I tell Dolphin that I want options like these to apply globally?

I'm trying to install packages on an offline PC using apt-offline, but I'm getting a 403 error on the online PC https://askubuntu.com/questions/1566635/im-trying-to-install-packages-on-an-offline-pc-using-apt-offline-but-im-getti

Offline PC: Ubuntu 24.04.4

sudo apt update (Online only at this point)
sudo apt install apt-offline_1.8.5-1_all.deb (Online only at this point)

Online PC: Ubuntu 24.04.4

sudo apt update
sudo apt install apt-offline

I tried to install various packages on the offline PC using apt-offline, following instructions I found online.

However, when I transfer the sig file generated on the offline PC to the online PC and try to download the packages as instructed, I get the same message for every package, and the download fails, creating a zip file with 0 bytes.

VERBOSE: http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/mozc-data_2.28.4715.102%2bdfsg-2.2build7_all.deb - 403 - Forbidden

I can download the corresponding deb file by accessing this URL directly from my browser (Firefox) at online PC.

I don't understand why downloading with `apt-offline get *.sig --bundle *.zip` results in a 403 error, even though I can download it from the browser.

How can I obtain the zip file using apt-offline?

Both my offline and online PCs are mostly in their original Ubuntu 24.04.4 state, except for enabling the firewall.

I haven't touched any repository settings. The image used to install Ubuntu 24.04.4 was "ubuntu-24.04.4-desktop-amd64.iso," which was downloaded from the official Ubuntu website.

Both events are scheduled to take place around May 8, 2026.

The following are the details of the execution in the terminal on the offline PC.

sudo apt-offline set /media/uzi/uzi-main-data/05-ibus-mozc.sig --install-packages ibus-mozc
Gathering installation details for package \['ibus-mozc'\]

The following are the details of the execution in the terminal on the online PC.

apt-offline get /media/uzi/uzi-net-data/05-ibus-mozc.sig --bundle /media/uzi/uzi-net-data/05-ibus-mozc.zip --threads 2 --verbose
VERBOSE: Namespace(verbose=True, quiet=False, get='/media/uzi/uzi-net-data/05-ibus-mozc.sig', socket_timeout=30, download_dir=None, cache_dir=None, disable_md5check=False, num_of_threads=2, bundle_file='/media/uzi/uzi-net-data/05-ibus-mozc.zip', deb_bugs=False, proxy_host=None, proxy_port=None, https_cert_file=None, https_key_file=None, http_basicauth=\[\], disable_cert_check=False, func=\<function fetcher at 0x7aee00995080\>)
VERBOSE: Default timeout now is: 30.
Fetching APT Data
VERBOSE: Item before split is: 'http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb' ibus-mozc_2.28.4715.102+dfsg-2.2build7_amd64.deb 189526 MD5Sum:cf60424448bfaa8e974b629f54f6e679
VERBOSE: Item after split is: 'http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb' ibus-mozc_2.28.4715.102+dfsg-2.2build7_amd64.deb 189526 MD5Sum:cf60424448bfaa8e974b629f54f6e679
VERBOSE: Stripped item URL is: http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb
VERBOSE: Stripped item FILE is: ibus-mozc_2.28.4715.102+dfsg-2.2build7_amd64.deb
VERBOSE: Stripped item SIZE is: 189526
VERBOSE: Stripped item CHECKSUM is: MD5Sum:cf60424448bfaa8e974b629f54f6e679
VERBOSE: Item before split is: 'http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb' ibus-mozc_2.28.4715.102+dfsg-2.2build7_amd64.deb 189526 MD5Sum:cf60424448bfaa8e974b629f54f6e679
VERBOSE: Item after split is: 'http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb' ibus-mozc_2.28.4715.102+dfsg-2.2build7_amd64.deb 189526 MD5Sum:cf60424448bfaa8e974b629f54f6e679
VERBOSE: Stripped item URL is: http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb
VERBOSE: Stripped item FILE is: ibus-mozc_2.28.4715.102+dfsg-2.2build7_amd64.deb
VERBOSE: Stripped item SIZE is: 189526
VERBOSE: Stripped item CHECKSUM is: MD5Sum:cf60424448bfaa8e974b629f54f6e679
VERBOSE: Thread is Thread-1 (run)                    
**VERBOSE: http://archive.ubuntu.com/ubuntu/pool/main/m/mozc/ibus-mozc_2.28.4715.102%2bdfsg-2.2build7_amd64.deb - 403 - Forbidden**                                                             
VERBOSE: Will still try with other package uris
ERROR: Failed to download ibus-mozc
Downloaded data to /media/uzi/uzi-net-data/05-ibus-mozc.zip
ERROR: Some items failed to download. Downloaded data may be incomplete
ERROR: Please run in verbose mode to see details about failed items
VERBOSE: The following files failed to be downloaded.
VERBOSE: Not all errors are fatal. For eg. Translation files are not present on all mirrors.
ERROR: ibus-mozc failed.
Kernel 6.17.0-23: No auto fan control after update Kernel https://askubuntu.com/questions/1566634/kernel-6-17-0-23-no-auto-fan-control-after-update-kernel

After Kernel update from Kernel 6.17.0-22 to Kernel 6.17.0-23 laptop lost automatic fan control and fans running on full speed.

Everything is OK when reboot back to 6.17.0-22.

Ubuntu 24

Micro-Star International Co., Ltd. Vector 16 HX AI A2XWHG

Any advices how to debug the issue?

After the last NetworkManager update, the use of aliases for the server no longer works https://askubuntu.com/questions/1566619/after-the-last-networkmanager-update-the-use-of-aliases-for-the-server-no-longe

This is a weird problem. I have two Ubuntu servers. One, running Ubuntu 25.10, is fine, no issues, the other one runs Ubuntu 24.04.4 and is the host for my Apache webserver and postfix/Dovecot email server.

After the last NetworkManager update last week, the use of network aliases no longer work for Ubuntu 24.04.4 server.

For instance if I want to connect to my webserver, www.abcvde.net that resides on the 24.04.4 server, I get a "Destination Host Unreachable." Nor can I use the IP address (192.168.0.22), it times out. However, if I use the localhost alias or its IP, it works. Using the server's own IP, 192.168.0.11 fails as unreachable.

Pinging the alias name, BBB fails, as does pinging its IP. However, I can ping other PCs/servers in my home network using either IP address or the alias.

What is more puzzling, since this occurred at the same time, I'm no longer receiving emails. I believe there's a connection but don't see how. I only have one server set up as a email Dovecot Imap/POP3 server and postfix so I can't just redirect the incoming email packets to another server. Outbound emails work, no issue. Email app is Thunderbird.

I also checked to see that the firewall is off. I'm behind two other firewalls and a NAT. A firewall isn't needed. The router is TP-Link.

Thoughts? Ideas?

Update. Checking with my external mail gateway, mu inbound emails are beging rejected at my end with "400 Network error: Could not connect: No route to host." The gateway confirmed my DNS entries are correct.

As an aside, I can connect to other servers in my private network from outside.

So, some thing happened with that update.

How to remove one OS from a triple boot system that shows incongruent boot lists https://askubuntu.com/questions/1566610/how-to-remove-one-os-from-a-triple-boot-system-that-shows-incongruent-boot-lists

I'm new to Linux (about 6 weeks) and have been testing multiple versions of Linux on my NUC which resulted with an SDD with three OS partitions. The sequence of installation was:

1. Windows 10
2. Ubuntu 
3. Winux

My goal: I want to remove Winux from the boot list as I migrate away from Windows and embrace Ubuntu.

My Situation: I've read other posts about multiple OS's and the removal of 1, but nothing seemed to match what I have unwittingly created.

In the PC's Intel BIOS, there are only two entries:

Windows Boot Manager
Winux 11

From Ubuntu using efibootmanager I have the following boot entries:

BootCurrent: 0001
BootOrder: 0001,0000,0002,0003
0000  Windows Boot manager
0001  Winux 11

When I select Winux 11 from the first boot list presented, I see a completely different list of boot options:

Winux 11 GNU/Linux
Advanced Options for Winux 11 GNU/Linux
Memory test (memtest86+x64.efi)
Memory test (memtest86+x64.efi, serial console)
Windows Boot Manager (on /dev/nvme0n1p1)
Ubuntu 24.04.4 LTS (24.04) (on /dev/nvme0n1p7)
Advanced options for Ubuntu 24..04.4 LTS (24.04) 
UEFI Firmware Settings

Now to add more confusion ... from Ubuntu when I list it's boot list:

awk -F\' '/menuentry / {print i++, $2}' /boot/grub/grub.cfg

I get yet another different boot list:

0 Ubuntu
1 Ubuntu, with Linux 6.17.0-23-generic
2 Ubuntu, with Linux 6.17.0-23-generic (recovery mode)
3 Ubuntu, with Linux 6.17.0-19-generic
4 Ubuntu, with Linux 6.17.0-19-generic (recovery mode)
5 memtest86+
6 Memory test (memtest86+x64.efi, serial console)
7 Windows Boot Manager (on /dev/nvme0n1p1)
8 Winux 11 (24.04) (on /dev/nvme0n1p6)
9 Winux 11 GNU/Linux (on /dev/nvme0n1p6)
10 Winux 11 GNU/Linux, with Linux 6.17.0-22-generic (on /dev/nvme0n1p6)
11 Winux 11 GNU/Linux, with Linux 6.17.0-22-generic (recovery mode) (on /dev/nvme0n1p6)
12 Winux 11 GNU/Linux, with Linux 6.17.0-19-generic (on /dev/nvme0n1p6)
13 Winux 11 GNU/Linux, with Linux 6.17.0-19-generic (recovery mode) (on /dev/nvme0n1p6)
14 Memory test (memtest86+x64.efi) (on /dev/nvme0n1p6)
15 Memory test (memtest86+x64.efi, serial console) (on /dev/nvme0n1p6)
16 UEFI Firmware Settings

My Concern: I'm confused with the various boot lists and their differing sequences. So using any of the other articles I've read didn't give me confidence to just "try" one of their methods. I don't feel like I could afford to lose my Windows system just yet ... although EOL is coming for it soon!

RDP remote login connection to Ubuntu 26.04: black screen https://askubuntu.com/questions/1566604/rdp-remote-login-connection-to-ubuntu-26-04-black-screen

I am unsuccessful in establishing a RDP remote login connection to Ubuntu 26.04LTS.
I followed the instructions here. It is a fresh installation of Ubuntu.

As a client I use Remmina on 24.04. Authentication works, but the screen remains black, with no error. Please see screenshot. The top border of the screen shows some "colors" when looking at it exactly.

enter image description here

In contrast, RDP Remote Desktop sharing works. Connection from other client devices equally do not work.

P.S. I did some further testing today, using a Windows 11 machine to connect. In fact, the Windows RDP client connects and logs in successfully to the Ubuntu 26.04 machine. So it is likely to be Remmina having some issues here?!The Windows RDP client only gives a warning about encryption: enter image description here

Remmina logs as follows:

System Info: "UID" : "0GNT7W4EQVOE1W-712ba847be", "REMMINAVERSION" : { "version" : "1.4.35", "git_revision" : "n/a", "snap_build" : 0, "flatpak_build" : 0 }, "SYSTEM" : { "kernel_name" : "Linux", "kernel_release" : "6.17.0-22-generic", "kernel_arch" : "x86_64", "lsb_distributor" : "Ubuntu\n", "lsb_distro_description" : "Ubuntu 24.04.3 LTS\n", "lsb_distro_release" : "24.04\n", "lsb_distro_codename" : "noble\n", "etc_release" : { "/etc/debian_version" : "trixie/sid\n", "/etc/lsb-release" : "DISTRIB_ID=Ubuntu\nDISTRIB_RELEASE=24.04\nDISTRIB_CODENAME=noble\nDISTRIB_DESCRIPTION="Ubuntu 24.04.3 LTS"\n", "/etc/os-release" : "PRETTY_NAME="Ubuntu 24.04.3 LTS"\nNAME="Ubuntu"\nVERSION_ID="24.04"\nVERSION="24.04.3 LTS (
This window can help you find connection problems. You can stop and start the logging at any moment using the On/Off switch. The stats button (Ctrl+T), can be useful to gather system info you may share when reporting a bug. There is more info about debugging Remmina on https://gitlab.com/Remmina/Remmina/-/wikis/Usage/Remmina-debugging (DEBUG) - (rcw_map_event) - Mapping: RemminaConnectionWindow (DEBUG) - (remmina_protocol_widget_map_event) - Calling plugin mapping function (DEBUG) - (remmina_protocol_widget_open_connection_real) - Opening connection (DEBUG) - (remmina_rdp_event_init) - Disable smooth scrolling is set to 0 (DEBUG) - (remmina_rdp_event_init) - Adding GDK_SMOOTH_SCROLL_MASK (DEBUG) - (remmina_protocol_widget_open_connection_real) - Have SSH (DEBUG) - (remmina_rdp_main) - RDP data path is /home/al/.local/share/remmina/RDP (DEBUG) - (remmina_rdp_main) - Not using system proxy settings (DEBUG) - (remmina_rdp_tunnel_init) - Tunnel init (DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - SSH tunnel initialzation… (DEBUG) - (remmina_rdp_event_on_focus_in) - Top level name is: RemminaConnectionWindow (DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - Calling remmina_public_get_server_port (DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - Calling remmina_public_get_server_port (tunnel) (DEBUG) - (remmina_protocol_widget_start_direct_tunnel) - server: 192.168.178.88, port: 3389 (DEBUG) - (remmina_rdp_tunnel_init) - protocol_plugin_start_direct_tunnel() returned [192.168.178.88]:3389 (DEBUG) - (remmina_rdp_tunnel_init) - Tunnel has been optionally initialzed. Now connecting to 192.168.178.88:3389 (DEBUG) - (remmina_rdp_main) - gfx_h264_available: 0 (DEBUG) - (remmina_rdp_main) - Resolution set by the user: 1552x788 (DEBUG) - (remmina_rdp_main) - Resolution set after workarounds: 1552x788 (DEBUG) - (remmina_rdp_main) - proxy_type: (null) (DEBUG) - (remmina_rdp_main) - proxy_username: (null) (DEBUG) - (remmina_rdp_main) - proxy_password: (null) (DEBUG) - (remmina_rdp_main) - proxy_hostname: (null) (DEBUG) - (remmina_rdp_main) - proxy_port: 80 (DEBUG) - (remmina_rdp_main) - Network settings not set (DEBUG) - (remmina_rdp_main) - rdp_keyboard_remapping_list: (null) (DEBUG) - (remmina_rdp_main) - Log level set to to INFO (DEBUG) - (remmina_rdp_post_connect) - bpp: 32 (DEBUG) - (remmina_rdp_post_connect) - CAIRO_FORMAT_RGB24 (DEBUG) - (remmina_rdp_OnChannelConnectedEventHandler) - Channel rdpdr has been opened (DEBUG) - (remmina_rdp_event_connected) - [2026-05-09T13:43:58.423315+02] - alAcer - al - Connected to 192.168.178.88 via RDP (DEBUG) - (rco_on_connect) - Connect signal emitted (DEBUG) - (rco_on_connect) - We save the last successful connection date (DEBUG) - (remmina_file_state_last_success) - State file /home/al/.cache/remmina/group_rdp_virtal-fernanmeldung-192-168-178-88-3389_192-168-178-88-3389.remmina.state. (DEBUG) - (remmina_rdp_OnChannelConnectedEventHandler) - Channel rdpsnd has been opened (DEBUG) - (remmina_rdp_OnChannelConnectedEventHandler) - Channel cliprdr has been opened (DEBUG) - (remmina_file_state_last_success) - Last connection made on 20260509. (DEBUG) - (rco_on_connect) - Saving credentials (DEBUG) - (rco_on_connect) - Trying to present the window (DEBUG) - (remmina_rdp_OnChannelConnectedEventHandler) - Channel drdynvc has been opened (DEBUG) - (remmina_rdp_event_on_focus_in) - Top level name is: RemminaConnectionWindow (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10: owner-change event received (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is different than me: new=(nil) me=0x64eaee922e10 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is not me: Sending local clipboard format list to server. (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x64eaee922e10 sending to server the following local clipboard content formats (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - local clipboard format text/plain;charset=utf-8 will be sent to remote as 13 (DEBUG) - (rcw_map_event) - Mapping: RemminaConnectionWindow (DEBUG) - (remmina_protocol_widget_map_event) - Calling plugin mapping function (DEBUG) - (remmina_rdp_event_on_map) - Map event received, disabling TS_SUPPRESS_OUTPUT_PDU (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10: owner-change event received (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is different than me: new=(nil) me=0x64eaee922e10 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is not me: Sending local clipboard format list to server. (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x64eaee922e10 sending to server the following local clipboard content formats (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - local clipboard format text/plain;charset=utf-8 will be sent to remote as 13 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10: owner-change event received (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is different than me: new=(nil) me=0x64eaee922e10 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is not me: Sending local clipboard format list to server. (DEBUG) - (remmina_rdp_event_on_focus_in) - Top level name is: RemminaConnectionWindow (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x64eaee922e10 sending to server the following local clipboard content formats (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - local clipboard format text/plain;charset=utf-8 will be sent to remote as 13 (DEBUG) - (rcw_toolbar_screenshot) - deny_screenshot_clipboard is set to true (DEBUG) - (remmina_rdp_get_screenshot) - allocating 4891904 bytes for a full screenshot (DEBUG) - (rcw_toolbar_screenshot) - Screenshot from plugin: w=1552 h=788 bpp=32 bytespp=4
(DEBUG) - (remmina_rdp_event_on_focus_in) - Top level name is: RemminaConnectionWindow (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10: owner-change event received (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is different than me: new=(nil) me=0x64eaee922e10 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is not me: Sending local clipboard format list to server. (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x64eaee922e10 sending to server the following local clipboard content formats (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - local clipboard format text/plain;charset=utf-8 will be sent to remote as 13 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10: owner-change event received (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is different than me: new=(nil) me=0x64eaee922e10 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is not me: Sending local clipboard format list to server. (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x64eaee922e10 sending to server the following local clipboard content formats (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - local clipboard format text/plain;charset=utf-8 will be sent to remote as 13 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10: owner-change event received (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is different than me: new=(nil) me=0x64eaee922e10 (DEBUG) - (remmina_rdp_event_on_clipboard) - gp=0x64eaee922e10 owner-change: new owner is not me: Sending local clipboard format list to server. (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - gp=0x64eaee922e10 sending to server the following local clipboard content formats (DEBUG) - (remmina_rdp_cliprdr_get_client_format_list) - local clipboard format text/plain;charset=utf-8 will be sent to remote as 13

Latest update broke private key loading stack on 26.04... only me? https://askubuntu.com/questions/1566526/latest-update-broke-private-key-loading-stack-on-26-04-only-me

The latest upgrade few days ago broke my desktop private key loading stack, in the sense that I have a passphrase protected private key, and I am used to SSH login to other sites with that key. The "normal behaviour" is that after any reboot Gnome ask your host password and somehow with that password it can open the private key and the SSH works normally. Now, I still have the pop-up asking my user/host password (not the passphrase), but the SSH login attempt just do nothing. I need to manually add the key with ssh-add ~/.ssh/id_rsa, and then it works.

Am I the only one with this strange behaviour ? Any workaround to get it back that the login "open automatically" the private key ?

Secure Boot Certificate in QEMU Ubuntu 24.04 for Windows Guest https://askubuntu.com/questions/1566505/secure-boot-certificate-in-qemu-ubuntu-24-04-for-windows-guest

I have a computer running Ubuntu 24.04 LTS desktop where I have QEMU/KVM running. One of the guest OS is Windows 11. This VM has secure-boot on as required by Windows. The secure boot certificates originally issued in 2011 will expire next month. The new certificates were issued in 2023.

The above page shows a table of expiring certificates:

| **Expiring Certificate**                  | **Expiration date** | **New Certificate**                  | **Storing location** | **Purpose**                                          |
| ----------------------------------------- | ------------------- | ------------------------------------ | -------------------- | ---------------------------------------------------- |
| **Microsoft Corporation KEK CA 2011**     | June 2026           | Microsoft Corporation KEK 2K CA 2023 | Stored in KEK        | Signs updates to DB and DBX.                         |
| **Microsoft Windows Production PCA 2011** | Oct 2026            | Windows UEFI CA 2023                 | Stored in DB         | Used for signing the   Windows boot loader.          |
| **Microsoft UEFI CA 2011\***              | June 2026           | Microsoft UEFI CA 2023               | Stored in DB         | Signs third-party boot loaders and EFI applications. |
| **Microsoft UEFI CA 2011\***              | June 2026           | Microsoft Option ROM UEFI CA 2023    | Stored in DB         | Signs third-party option ROMs                        |

It looks like my VM is not using the new certificates. When I check the secure boot status from within Windows guest, it says:

Secure boot is on, but your device is using an older boot trust configuration that should be updated. There is not yet enough data to classify your device for automatic update.

This page says if I see this message then:

Your device might need additional validation before the update can proceed automatically. Visit aka.ms/getsecureboot for more information.

The link takes me back to the original page linked above.

This made me think Windows update failed to work with QEMU's UEFI firmware called OVMF.

The XML tab of the Overview section of the Virtual Machine Manager shows in part:

    <loader readonly="yes" secure="yes" type="pflash">/usr/share/OVMF/OVMF_CODE_4M.ms.fd</loader>
    <nvram template="/usr/share/OVMF/OVMF_VARS_4M.ms.fd">/var/lib/libvirt/qemu/nvram/win11_VARS.fd</nvram>

The files OVMF_CODE_4M.ms.fd and OVMF_VARS_4M.ms.fd have the modified date of December 10, 2025. The file OVMF_CODE_4M.ms.fd is linked to OVMF_CODE_4M.secboot.fd in the folder /usr/share/OVMF/.

I looked at the OMVF UEFI configuration menu and couldn’t find anything regarding the secure boot certificates or anyway to add new ones.

Here is the Windows 11 System log:

Log Name:      System
Source:        Microsoft-Windows-TPM-WMI
Date:          5/6/2026 2:37:16 PM
Event ID:      1801
Task Category: None
Level:         Error
Keywords:      
User:          SYSTEM
Computer:      Dev1-Win11
Description:
Updated Secure Boot certificates are available on this device but have not yet been applied to the firmware. 
Review the published guidance to complete the update and maintain full protection. 
This device signature information is included here.
DeviceAttributes: 
BaseBoardManufacturer:;
FirmwareManufacturer:Ubuntu distribution of EDK II;
FirmwareVersion:2024.02-2ubuntu0.8;
OEMModelNumber:Ubuntu 24.04 PC (Q35 + ICH9, 2009);OEMModelBaseBoard:;
OEMModelSystemFamily:;OEMManufacturerName:QEMU;OEMModelSKU:;OSArchitecture:amd64;
BucketId: 2a0656131aa2862c533c820200125d8c3c845a85144dde851c754bc22261465a
BucketConfidenceLevel: No Data Observed - Action Required
UpdateType: 
For more information, please see https://go.microsoft.com/fwlink/?linkid=2301018

My searches have led to some solutions for Red Hat, and Proxmox, but nothing specific to Ubuntu.

From the Linux perspective most solutions refer only to updating to the Microsoft UEFI CA 2023 certificate. I have not seen anything on how or if one should update the three other certificates expiring in 2026 when running Windows in a VM.

Q: How do I make sure that the OMVF is using all the secure boot certificates from 2023 so that Windows 11 works as expected beyond June 2023?

Thanks

How to get thumbnails for cbz and cbr files in nautilus? https://askubuntu.com/questions/1566408/how-to-get-thumbnails-for-cbz-and-cbr-files-in-nautilus

I recently installed Ubuntu 26.04 and I noticed that the thumbnails for my comics aren't showing in the Files file manager. I tried installing different thumbnailers, but nothing seems to work. Instead it just shows the default Ubuntu document icons.

Image showing document icons

I do not have Evince or mcomix installed. I'm using the default document reader that comes with Ubuntu 26.04.

I am trying to change Ubuntu desktop settings but I am getting an error. How to resolve this error? https://askubuntu.com/questions/1566096/i-am-trying-to-change-ubuntu-desktop-settings-but-i-am-getting-an-error-how-to

I am running Ubuntu 26.04 LTS and this error occurs in the settings.

I get this error when I try to change the Ubuntu desktop settings in Ubuntu 26.04 LTS. I have uploaded the error message. If there is any solution please share.

Best Regards

Tux The Linux Fan

How do I make F13 not open settings? (Ubuntu 24.04.2 LTS) https://askubuntu.com/questions/1552265/how-do-i-make-f13-not-open-settings-ubuntu-24-04-2-lts

I am actually malding right now. I've just set up Input Remapper to map Caps Lock to F13 so that I can use it as another button in games. In Windows, I would do this with Razer Synapse (also remapping Fn+Caps back to Caps Lock) and it would work fine, but it seems I have another reason to dislike Razer.

Anyway, now everytime I press F13 (Caps Lock), it opens Settings. I tried removing the useless bind by setting /org/gnome/settings-daemon/plugins/media-keys/control-center-static to [''], but that didn't work. I tried remapping key 179 (previously XF86Tools) to F13, but that also didn't work. Of course, Google's as useful as it always is in these situations, so I'm out of ideas. How do I stop this from happening? Bonus if you can tell me how to map my Synapse keys on Linux as well.

Edit: I also tried mapping key 66 (Caps Lock) to F13 via xmodmap (below code), and that doesn't open Settings, but now it both presses F13 and engages Caps Lock. What?

keycode  66 = F13 F13 F13 F13 F13 F13 F13 F13
How to solve black screen after suspension or lock screen with Ubuntu 22.04 LTS? https://askubuntu.com/questions/1411400/how-to-solve-black-screen-after-suspension-or-lock-screen-with-ubuntu-22-04-lts

Hi everyone I just installed Ubuntu 22.04, every time I suspend or lock my screen there is a black screen and I have to force shutdown.

I have NVIDIA 940MX

I have tried all the options on the Internet to downgrade the version from 510 to 470,390 , I tried to reconfigure the grub and I changed gdm to lightdm. Nothing worked out I tried those solutions:

  1. System freeze after suspend
  2. https://forums.developer.nvidia.com/t/solved-suspend-resuming-and-wakeup-with-nvidia370-28/45282
  3. how to solve black screen after suspension with Ubuntu 22.04 LTS?

I've been trying for almost 2 days nothing is working can someone please help me and guide me to solve this problem

I really appreciate any help you can provide.

eclipse: class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0 https://askubuntu.com/questions/1032292/eclipse-class-file-version-53-0-this-version-of-the-java-runtime-only-recogni

Since the update yesterday (yes, the linux update), eclipse denies me to run even the most simple helloworld:

has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Full error text:

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: gitplayground/HelloWorld has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)

I tried to update the JRE (and JDK):

  • window -> preferences -> java -> installed JREs. I could check: java-8-openjdk-amd64 (which is currently) or java-11-openjdk-amd64.
  • window -> preferences -> java -> compiler. Compiler compliance level is set to 1.8 (it doesn't know java 11. It does know java 9.)
  • window -> preferences -> java -> Installed JREs -> Execution Environment. When clicking on JavaSE-1.8 in the left list, 2 options appear in the right one: java-8-openjdk-amd64 and java-1.8-openjdk-amd64. First one is checked. (But I don't think, that matters, because these should be the same.)
  • I tried to update eclipse. (No updates available)

So anything is set to Java8. Why does the error still occur?

Btw, some of my projects (the helloworld including) are marked with a red exclamation mark, but the error appears in any project, not in these only.


  • I use XUbuntu 18.04 now (before the update anything worked fine)
  • I use eclipse Photon
  • I use java standard API only
  • I use git and the eclipse git plugin
How do i log output of background program in a file https://askubuntu.com/questions/993703/how-do-i-log-output-of-background-program-in-a-file

i am running a program on ubuntu linux server at the background using setsid <program name> normally, the programs prints its output in the terminal but i want to see the output in a file, like a log file even while the program runs at the background. How can i achieve that?

"Read Error" on boot https://askubuntu.com/questions/374961/read-error-on-boot

So my computer froze while it was in powersave mode, and I could not reboot it with REISUB, or access it over the network, forcing me to hard reboot. When I rebooted, I was greeted with the message "Read Error" in the top left corner.

I booted into a LiveCD, and tried

fdisk -l

which gave me the following output:

root@ubuntu:/home/ubuntu# fdisk -l
fdisk: unable to read /dev/sda: Inappropriate ioctl for device

I immediately imaged the drive with gddrescue, and then proceeded to run e2fsck. That seemed to complete successfully, and now when I run fsck, I get:

fsck from util-linux 2.20.1e2fsck 1.42.8 (20-Jun-2013)
/dev/sda1: clean, 1475560/18317312 files, 48594157/73242187 blocks

So all seems good over there. However, I still cannot get any output from fdisk, and when I reboot, I still get the same error.

How to disable the drop shadow effect at the edge of windows in Gnome Shell? https://askubuntu.com/questions/351726/how-to-disable-the-drop-shadow-effect-at-the-edge-of-windows-in-gnome-shell

Here is:

enter image description here

I try to find in gnome-tweak-tool, but I have no luck. I'm using Gnome Shell v3.8.3 on Ubuntu Gnome 13.04.