Não consigo instalar o repositório ppa da impressora canon ip1800 no xubuntu 21.04 LTS, dá um erro no terminal ao colocar os seguintes comandos:

sudo add-apt-repository ppa:thierry-f/fork-michael-gruz

sudo apt-get update

sudo apt-get install cnijfilter2 scangearmp2 cndrvcups-utility

I recently upgraded to Ubuntu 26.04 (Kernel 7.0) on my Lenovo IdeaPad Slim 5 15ARP10 (model 83J3) and had no sound from the internal speakers. Bluetooth audio worked fine though. The problem: The Conexant SN6140 audio chip is recognized by Linux (aplay -l shows it), but PipeWire never properly initializes the speaker output on boot. The speaker port shows “availability unknown” and no sink is created for it.

I am unable to open the software and update to upgrade the system. I get the following message when I try to update in the terminal: N: Ignoring file 'third-party.sources.save.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

E: Malformed entry 1 in sources file /etc/apt/sources.list.d/third-party.sources (URI parse)

E: The list of sources could not be read.

How can I get into the update?

Any ideas why this tab is constantly crashing ? https://www.icloud.com/mail/

I maintain various tabs with my email addresses open so I can check for emails. They are stable, but the address above keeps crashing.

This command works as I might expect:

alias pgmstat='lsof -p $(pgrep -d'\'','\'' 2>/dev/null) 2>/dev/null'

However, when I wrap it in double quotes, precede it with echo, and send it to a stdout file, bash prompt is expecting more:

echo "alias pgmstat='lsof -p $(pgrep -d'\'','\'' 2>/dev/null) 2>/dev/null'" >.file

Surely, I don't understand.

Specs:

• Processors: 12× 12th generation Intel® Core™ i5-12400F

• RAM capacity: 32 GB (31.2 GB available)

• Graphics Processor: NVIDIA GeForce RTX 3070 Ti

The bottom line is that during the download in try install - it does not reach the download of the installer - the cursor _ flashes in the upper right corner - endlessly. If in safe mode - Ubuntu is hanging on the screen - with a boot signal - but music is playing - I tried switching the monitor via Win+p, - it didn't help.

There is also an error when loading, although there is nothing wrong with my memory.

Prescribing nomodeset does not help. It stops at this picture and doesn't go any further. A memory error BUG: Bad page state in process swapper pfn:24f86d also occurs during boot.

I'm a beginner. I'm using a Galaxy Book2 Pro 5G with Ubuntu 26.04 LTS installed. The known problem is that there's no sound from the speakers, but there is sound when I plug in headphones. There's very little information about this online. If anyone knows a solution, could you please share it? Thank you very much!

I’ve just upgraded 24.04.4 to the latest software release and lost my BMC43228 WiFi adapter. Going into the GRUB boot menu I can chose between Linux kernel 6.17.0-23 and 6.8.0-41. Using the earlier 6.8 version I still had a working WiFi, so I felt reasonably confident about fixing the 6.17 install. Doing an lshw -class network I can see the BMC43228 adapter as -network UNCLAIMED.

I’ve tried uninstalling and reinstalling the driver, but it comes back with an error that suggests I look in /var/lib/dkmd/broadcom-sta/6.30.223.271/build/make.log as shown below.

DKMS make.log for broadcom-sta-6.30.223.271 for kernel 6.17.0-23-generic (x86_64)  
Fri May  1 12:34:37 PM BST 2026  
CFG80211 API is prefered for this kernel version  
Makefile:91: Neither CFG80211 nor Wireless Extension is enabled in kernel  
KBUILD_NOPEDANTIC=1 make -C /lib/modules/6.17.0-23-generic/build M=`pwd`  
make[1]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.  
make[1]: Entering directory '/usr/src/linux-headers-6.17.0-23-generic'  
make[2]: Entering directory '/var/lib/dkms/broadcom-sta/6.30.223.271/build'  
warning: the compiler differs from the one used to build the kernel  
  The kernel was built by: x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0  
  You are using:           gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0  
CFG80211 API is prefered for this kernel version  
Using CFG80211 API  
Kernel architecture is X86_64  
  CC [M]  src/shared/linux_osl.o  
src/shared/linux_osl.c:23:10: fatal error: typedefs.h: No such file or directory  
   23 | #include <typedefs.h>  
      |          ^~~~~~~~~~~~  
compilation terminated.  
make[4]: *** [/usr/src/linux-headers-6.17.0-23-generic/scripts/Makefile.build:287: src/shared/linux_osl.o] Error 1  
make[3]: *** [/usr/src/linux-headers-6.17.0-23-generic/Makefile:2016: .] Error 2  
make[2]: *** [/usr/src/linux-headers-6.17.0-23-generic/Makefile:248: __sub-make] Error 2  
make[2]: Leaving directory '/var/lib/dkms/broadcom-sta/6.30.223.271/build'  
make[1]: *** [Makefile:248: __sub-make] Error 2  
make[1]: Leaving directory '/usr/src/linux-headers-6.17.0-23-generic'  
make: *** [Makefile:183: all] Error 2  

The line Makefile:91: Neither CFG80211 nor Wireless Extension is enabled in kernel suggests the kernel is at fault. Is this the case and how do I fix it?

I have downloaded .deb file and opened it with App Center. There is a warning that it is potentially unsafe but I clicked to Install anyway. It says installing now but nothing happens for at least 5 minutes. What should I do?

when my Lenovo x390 laptop suspends it won't wake again. Pushing the power button results in the fan turning on but the screen remains black and the power button lights slowly on and off showing that the system is in suspended mode.

Troubleshooting the issue I was booting the system from a ubuntu live-usb. The same problem occurs.

What may be the problem, what can I do?

Best regards, Joachim

In lmde 7, Warning: OpenPGP signature verification failed: http://gb.archive.ubuntu.com/ubuntu jammy InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Missing key 871920D1991BC93C, which is needed to verify signature. Error: The repository 'http://gb.archive.ubuntu.com/ubuntu jammy InRelease' is not signed. Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.

So i have a pc, and i'm currently trying to install ubuntu on it, the window is open and saying "isntalling system" but it's been doing that for the past 11 hours. It's downloading from a usb-drive and my dad has some knowledge about this and he says that it should take 1-2 hours to download it to a pc like this from a usb-drive. It's been "installing" for the past 11 hours. I can use apps and things like that but it still says it's installing the system... Why? And can i close the tab? What should i do?

I have just installed Ubuntu and I am attempting to install applications. I am a beginner with Linux, but comfortable with the command line and *nix basics. I can't get the App Center in Gnome to work, as it says that it can't connect to the internet, although I have verified that my internet connection works and I can install software using apt.

Some internet searches have suggested a few fixes, none of which have worked. These include:

• killing and restarting snap-store (no difference)

• killing and restarting network-manager (not using network-manager)

• removing and reinstalling snap-store

• proxy settings (I'm not using any proxies)

Diagnostics

 $ snap debug connectivity
Connectivity status:
* api.snapcraft.io: unreachable
error: 1 servers unreachable

However, surprisingly ping api.snapcraft.io responds.

For now I've resolved to just use apt for package management, but there are some applications where I can see an advantage to containerized installations, so I'd like to get the App Center working.

What are possible reasons and solutions for the App Center's connectivity problems?

With the latest attack, is there a chance of repo poisoning? Concerned if in my attempt to update and mitigate against this this morning 05/01/26, if there's a potential that poisoned code could be injected into the repos that could resemble an update? Should all repos be forced offline by maintainers until they can be sanitized?

I bought some parts for my PC because without them I can't use WiFi and Bluetooth. I bought a Tenda U2 AX300 and a TPlink ub500.

The good thing is that the Bluetooth dongle or antenna (idk which) is plug and play, but I can't use it for the Tenda U2 AX300. I tried using a wired Ethernet connection. I tried using wired to my phone to host WiFi. I tried Bluetooth, but none of them worked. Before I switched to Ubuntu I used Windows 11 and I used the same Tenda adapter (I had to download drivers from the internet). I downloaded using a hotspot from my phone and then it ran, but with Ubuntu none of them worked. I'm new to this and don't know anything about it, and I'm still learning.

Is it known whether the recent attacks (see Ubuntu Infrastructure not responding, returning 503 or other errors) on the whole Ubuntu infrastructure (official Websites/snapcraft/Launchpad) cause any security risk in computers running Ubuntu?

MODERATOR NOTICE: This is an active incident. Do not respond unless you have additional information on it. Speculation is not permitted, nor is just saying "it's down right now".

Such posts or answers WILL be deleted without question.

I have tried to visit the official Ubuntu website, but it seems to fail with 503. Can anyone share any information they might know about this issue?

We are running a bunch of containers for a cyber security teaching environment, where students can execute arbitrary commands (unprivileged).

Our system (Ubuntu 24.04.4 LTS) is affected by the recently-published "Copy Fail" vulnerability (CVE-2026-31431).

Unfortunately, updating did not produce any new kernel packages, and we are still stuck with 6.8.0-110:

# uname -a
Linux teaching-host 6.8.0-110-generic #110-Ubuntu SMP PREEMPT_DYNAMIC Thu Mar 19 15:09:20 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux

PoC exploit (makes su not ask for passwords until undoing it below or rebooting):

$ cat exploit.py | python3 && su
# id
uid=0(root) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),101(lxd),988(docker)
# sudo sysctl -w vm.drop_caches=3 # Undo the exploit

How can we harden our system until an official patch package becomes available?

I used Obsidian software on ubuntu 25.10. I did a test before production with 26.04. I install obsidian just after installing os; obsidian is ok; I reboot ubuntu and obsidian does nothin when I launch it; do you have an idea?

I'm trying to limit ssh key exchanges to the two post-quantum secure algorithms in Ubuntu 26.04.

I've created the file /etc/ssh/sshd_config.d/99-pqc.conf and its permissions are the same as sshd_config. The content of the file is this:

# Post-quantum only SSH key exchange
KexAlgorithms mlkem768x25519-sha256,sntrup761x25519-sha512@openssh.com
# Log negotiated algorithms so we can audit what clients are actually using
LogLevel VERBOSE

When I restart ssh, the two pqc ciphers are at the head of the list but all the old, non post-quantum secure ones are still there.

Searches online yielded the advice that failure to enforce the override was often due to configuration conflicts between NetworkManager and systemd-networkd. However only NetworkManager is active so I don't think that's the source of the problem.

Any suggestions about where to go from here?

my computer is a Samsung Book 2 Pro 5G. The following System program problem detected message appeared while installing Ubuntu Desktop 26.04.

1. Environment & Hardware

Machine: Apple MacBook Pro 13-inch (Late 2013)

Network Controller: Broadcom Inc. and subsidiaries BCM4360 802.11ac Wireless Network Adapter [14e4:43a0]

OS: Ubuntu 24.04 LTS (Clean install, LUKS encrypted LVM)

Kernel Version: 6.8.0-45-generic

2. Issue Summary No Wi-Fi connectivity post-installation. The proprietary Broadcom drivers (broadcom-sta-dkms / bcmwl-kernel-source) fail to compile via DKMS on Kernel 6.8 due to deprecated kernel API usage (specifically, the old init_timer function instead of the modern timer_setup).

3. Troubleshooting Steps Performed To rule out user error, missing dependencies, or broken package states, the following steps were executed using a USB tethered connection:

Clean State & Prerequisites: * Performed a full system update (apt update && apt upgrade -y) bringing the system to Kernel 6.8.0-45.

Installed required build tools: sudo apt install build-essential linux-headers-$(uname -r).

Package Cleanup: * Forced removal of previously failed GUI installations to break the apt broken-install loop using: sudo dpkg -P --force-all bcmwl-kernel-source broadcom-sta-dkms

Cleared cache and verified system integrity (apt clean, apt --fix-broken install).

Driver Installation Attempt: * Attempted to install the community-maintained package: sudo apt install broadcom-sta-dkms (also attempted bcmwl-kernel-source).

4. Result & Root Cause Analysis The DKMS build process fails consistently. Upon inspecting the make.log (/var/lib/dkms/bcmwl/.../build/make.log), the compilation aborts with the following critical error:

error: implicit declaration of function 'timer_setup'

Conclusion: The source code provided in the current broadcom-sta-dkms (and bcmwl-kernel-source) packages within the Ubuntu 24.04 noble repositories has not been patched to support Kernel 6.8. The proprietary Broadcom code still relies on the deprecated init_timer function, causing an inevitable compilation failure on modern kernels.

Request: Looking for information on whether a patched version of broadcom-sta-dkms for Kernel 6.8+ is planned for the 24.04 repositories, or if there is an officially recommended PPA/workaround for BCM4360 chips in the meantime, aside from manually patching the .c files locally.

I am very new to Linux and now using Ubuntu 24.04.2 LTS for months

But recently I see a strange orange icon in the taskbar which I don't know what its means because no text in it. Please see attached image

Anyone know what is it? What its means? Just curious

The camera (2nd gen) of my Framework 13" laptop with Ubuntu 24.04 shows my face quite red in video conferences. Is there a way to tweak the video output at the system level? I've looked for settings in the browser or the conferencing apps, but there's nothing there.

I have a Zinnia Momentum MT-100 tablet that I'm trying to use on 20.04 and it works on plug and everything, the only issue is that the orientation is wrong. It's detecting horizontal inputs as vertical and vice versa. I've tried to search a solution but all of the tutorials and forum replies refer specifically to Wacom tablets. would the Wacom settings work on non-Wacom tablets? if not, how do I fix this?

I run Ubuntu 22.04 LTS with Remote Desktop that is built in and it is great! (see attached image) However, when my internet connection breaks the service seems to hang up and I need to reboot the computer in order to be able to connect again. The normal sshd always works even after a connection issue so I wonder how do I: Reset this service from command line?

It seems to me that just resetting it will work but I don't know what service it is... Thanks for any suggestion :-)

I have a ryzen pc with an AMD Radeon Vega card, running ubuntu 22.04LTS, and I'm trying to install the amdgpu-install_22.10.2.50102-1_all driver so that I can use Blender 3.2 and have HIP support. However, I'm having a terrible time, and all my efforts have been for nought.

When I run the command amdgpu-install -y --opencl=rocr

I get the following ouput:

linux-headers-5.15.0-40-generic is already the newest version (5.15.0-40.43).
linux-headers-5.15.0-40-generic set to manually installed.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
apt : Depends: libapt-pkg6.0 (>= 2.4.5) but it is not going to be installed
grub-efi-amd64-signed : Depends: grub-efi-amd64-bin (= 2.06-2ubuntu7)
                     Depends: grub-efi-amd64 or
                              grub-pc but it is not going to be installed
init : PreDepends: systemd-sysv
libegl1-amdgpu-mesa : Depends: libudev1 but it is not installable or
                            libudev0 but it is not going to be installed
 libegl1-amdgpu-mesa-drivers : Depends: libudev1 but it is not installable or
                                    libudev0 but it is not going to be installed
 libgbm1-amdgpu : Depends: libudev1 but it is not installable or
                       libudev0 but it is not going to be installed
 libgl1-amdgpu-mesa-glx : Depends: libudev1 but it is not installable or
                               libudev0 but it is not going to be installed
 rocm-llvm : Depends: python but it is not installable
         Depends: libstdc++-5-dev but it is not installable or
                  libstdc++-7-dev but it is not installable
         Depends: libgcc-5-dev but it is not installable or
                  libgcc-7-dev but it is not installable
         Recommends: gcc-multilib but it is not going to be installed
         Recommends: g++-multilib but it is not going to be installed
 util-linux : PreDepends: libudev1 (>= 183) but it is not installable
 xserver-xorg-amdgpu-video-amdgpu : Depends: libudev1 (>= 183) but it is not 
installable
Depends: xorg-video-abi-24 but it is not installable
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held 
packages.

I was under the impression that the driver was supported in Ubuntu 22.04LTS. I am new to Ubuntu so how do I get these installed if they're not installable, or is it all impossible?

I am trying to simulate casting my display to a miracast sink on linux. It seem like gnome-network-displays is a good option. I was having trouble getting it to work and was not sure if the fact I am running linux on a virtual machine on my windows device was the issue. It that an inherent problem?

Whenever I try sudo apt-get update I get this error:

W: Failed to fetch https://repo.windscribe.com/ubuntu/dists/bionic/InRelease  Could not connect to repo.windscribe.com:443 (10.10.34.35), connection timed out  

The windscribe.com VPN is forbidden in my country. Is there any other way to install winscribe-cli package manually? I'm using Ubuntu 20.04 LTS x86_64.

I installed Ubuntu 18.04 and then while installing Virtualbox i get the 'i386' error message after I did:

$ sudo apt-get update
Get:1 http://nl.archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
Hit:2 http://security.ubuntu.com/ubuntu bionic-security InRelease                                                                
Hit:3 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu bionic InRelease                                         
Hit:4 http://nl.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:5 http://nl.archive.ubuntu.com/ubuntu bionic-backports InRelease
Get:6 http://download.virtualbox.org/virtualbox/debian bionic InRelease [4429 B]
Get:7 http://download.virtualbox.org/virtualbox/debian bionic/contrib amd64 Packages [1426 B]
Fetched 248 kB in 1s (209 kB/s)     
Reading package lists... Done
N: Skipping acquire of configured file 'contrib/binary-i386/Packages' as repository 'http://download.virtualbox.org/virtualbox/debian bionic InRelease' doesn't support architecture 'i386'

I found several answers on Askubuntu for the 'i386' message but I don't know how to apply this to my situation