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 have installed Ubunutu 24.04.4 LTS on my microsoft surface pro laptop, and now it will not detect my external monitor. I used a USB to HDMI adapter for a secondary display when windows was installed, but now that I have Ubuntu it isnt detecting anything. I have tried downloading/installing nvidia drivers and using auto install of all drivers but nothing has worked. I am still new to Linux and I am struggling with this. Please help if at all possible.

Im new to os es and i wanted to try ubuntu i dowloaded on my pc.So befor i start the problem i bought for my pc some parts beakuse without the i cant use wifi and bluetooth,i bought a tenda ax300 u2 and a tplinkub500 The good thing is the bluetooth dongle or antenna(idk)is plug and play that easy but for the tenda ax 300 u2 i cant use it .I tried using a wired ethernet i tried using wire to my phone to host wifi i tried bluetooth but none of it work.Before i changed to ubuntu i used win11 and i used the same tenda adapter (i had to dowload drivers from internet)i dowloaded in hotspot from my phone and then it run.But with ubuntu none of it helped.Im new to this and dont know anithing about it ,still learning but if you van pls help

It is written/dev/mmcb1k1p2: clean, 332545/1835008 files , 6982173/7339520 blocks.

WHAT SHOULD I DO

I've been experiencing a few problems with updates failing.
I tried running sudo apt --fix-broken install and that gives the following output:

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
4 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up rsyslog (8.2312.0-3ubuntu9.2) ...
info: The user `syslog' is already a member of `adm'.
dpkg: error processing package rsyslog (--configure):
 installed rsyslog package post-installation script subprocess returned error exit status 10
Setting up docker-desktop (4.71.0-225177) ...
Enabling use of privileged ports by Docker Desktop
kubernetes.docker.internal already in /etc/hosts
ln: failed to create symbolic link '/usr/local/bin/docker': File exists
dpkg: error processing package docker-desktop (--configure):
 installed docker-desktop package post-installation script subprocess returned error exit status 1
Setting up linux-headers-6.17.0-20-generic (6.17.0-20.20~24.04.1) ...
/etc/kernel/header_postinst.d/dkms:
 * dkms: running auto installation service for kernel 6.17.0-20-generic
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...(bad exit status: 2)
make -j8 KERNELRELEASE=6.17.0-20-generic VER=6.17.0-20-generic KERNEL_SRC=/lib/modules/6.17.0-20-generic/build REVISION=0.2.202505
20-2+noble...(bad exit status: 2)
ERROR (dkms apport): binary package for ovpn-dco: 0.2.20250520-2+noble not found
Error! Bad return status for module build on kernel: 6.17.0-20-generic (x86_64)
Consult /var/lib/dkms/ovpn-dco/0.2.20250520-2+noble/build/make.log for more information.
dkms autoinstall on 6.17.0-20-generic/x86_64 failed for ovpn-dco(10)
Error! One or more modules failed to install during autoinstall.
Refer to previous errors for more information.
 * dkms: autoinstall for kernel 6.17.0-20-generic
   ...fail!
run-parts: /etc/kernel/header_postinst.d/dkms exited with return code 11
dpkg: error processing package linux-headers-6.17.0-20-generic (--configure):
 installed linux-headers-6.17.0-20-generic package post-installation script subprocess returned error exit status 11
Setting up gdm3 (46.2-1ubuntu1~24.04.7) ...
dpkg: error processing package gdm3 (--configure):
 installed gdm3 package post-installation script subprocess returned error exit status 10
No apport report written because MaxReports has already been reached
                                                                    Errors were encountered while processing:
 rsyslog
 docker-desktop
 linux-headers-6.17.0-20-generic
 gdm3
E: Sub-process /usr/bin/dpkg returned an error code (1)

Trying to install yakuake (terminal prog), and installs fine, but will not run:

john@Ubunt2604-Latitude:~$ yakuake

Couldn't start kglobalaccel from org.kde.kglobalaccel.service: QDBusError("org.freedesktop.DBus.Error.ServiceUnknown", "The name org.kde.kglobalaccel was not provided by any .service files")

Segmentation fault         (core dumped) yakuake

Anyone?

Thanks.

I am not able to connect to port 443 at api.snapcraft.io since today. However port 80 works. Since port 443 is not accessible I cannot "refresh" my snaps:

# snap refresh
error: unable to contact snap store
# curl -I https://api.snapcraft.io
curl: (28) Connection timed out after 300170 milliseconds
# telnet api.snapcraft.io 80
Trying 185.125.188.59...
Connected to api.snapcraft.io.
Escape character is '^]'.
^]
telnet> quit
Connection closed.
# telnet api.snapcraft.io 443
Trying 185.125.188.57...
Connection failed: Connection timed out

I have some virtual servers around the world and all work with no problem.

However, I have tried with two different ISP's in my location (Turkey) and both have the problem I described above.

Is it a general problem? Are any other snap users around the world facing the same problem?

when I turn my pc (tower HP)to sleeping mode I have the fans of the graphic card going noisy, then black screen and total freeze. Nothing to do but reboot. Graphic Card : GTX1060 driver 580.142 . I tried to install driver 535 with no effect. I also tried with no Nvidia driver an then sleeping mode is OK but not satisfying situation. This points clearly a Nvidia/Wayland driver Issue I guess. Any idea ? (I'm now with 580 driver)

Good morning all, I'm running Ubuntu 2404 and since yesterday I'm getting an error while searching for apps in Applets. It states there's no internet connection but everything else like web browser, mail et works. I have stopped VPN to no avail.

Any suggestions?

When working in a Ubuntu 26.04, the system suddenly freezes and none of the keys on the keyboard or mouse work

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?

What I know so far.

1. When I start streaming on discord using the desktop app it stops streaming a less than a second after starting it.

2. I have attempted to stream using the browser and that does work. But I would rather not have to join on the browser every time I have to stream.

3. I have followed some other advice here and found out that I am on Wayland (not sure what that means) and that I should want to be on X11. But when I have attempted to go into the config file to change it the comment #waylandenabled = false is nowhere to be seen. And the config file isn't that long so I can't be missing it.

I attempted to add in waylandenabled = false into the config under [daemon], then I saved and exited the config. I believe after I hit enter it caused me to reset my computer or at least made me log out again.

After that discord still isn't streaming so I'm not sure what to do next exactly.

I have mostly been looking at this here Im having issues with screen sharing in Discord on Ubuntu

and attempting to use the AI assistant tool.

I am using Ubuntu 26.04 LTS

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?

This has been going on for a few days now. My computer did a major update, and after that my computer struggles with Skyrim LE even though it had no issue at all before that. The spikes mainly happen during combat, particularly dragon fights, making the game nigh impossible to play. Even simply walking around is grueling because of the lag spikes.

I tried to change my emulator to proton 10 ge from proton 8 ge, but that only made my game run worse. I tried to revert to the last version, but that just made my computer freeze. I did this through the menu that comes up if you press esc during start up. Its the same menu that appears after a major update at times. I selected version 5, but as stated that didn't end well. I even reinstalled my graphics driver, but that made no difference at all either.

I'm at a loss as to what else to do. I can't continue my playthrough because my game is now practically unplayable even though it was fine just before. I was hoping another update would fix this after people complained, but nothing has happened other than updates for something called iproute2. I can't even find an option on my comp to issue a report about the problem I'm having.

What else can I do here?

And no, my steam is NOT installed through snap. I learned that the hard way when I first installed ubuntu years ago.

update: Well, I got another major update. It both updated the kernal, and some of the updates even named my graphics card driver. After that, my game runs like it did before, perhaps better even. I'd still like to know what happened. Version right now is showing Ubuntu 22.0.4.5 LTS. Graphics driver is nvidia 580. And yes, I know that's not the most up to date version, I had to set it to that to keep firefox from crashing on me randomly. It had no impact on my games fortunately enough.

i did some basic tweak for supressing the Wayland Display, but could not set to x11.

Can someone post how i can disable Wayland and continue on X11 i haev some apps that dont support Wayland.

For example wmctrl and onboard don't work for me with Wayland. So if you really need one of these or some other tool, that needs x11, then I suggest that you try with Lubuntu or Xubuntu or some other flavor of Ubuntu, that is still using x11. You can try these flavors live (booted from USB without installing) before you decide what to use. But several tools work with Wayland now, and there are might be alternatives for some of your old favorites, alternatives that work in Wayland.

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 reboot):

$ 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)

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

I am experiencing severe lag and intermittent freezing after resuming my laptop from suspend on Ubuntu 26.04 (Resolute). The system becomes almost unresponsive for a period of time or requires a hard reboot.

My System Specs:

• OS: Ubuntu 26.04 LTS (Development Branch)

• Kernel: 7.0.0-14-generic

• CPU: AMD Ryzen 5 4600H with Radeon Graphics

• GPU: NVIDIA GeForce GTX 1650 (Laptop)

• Driver Version: 580.142

• Display Server: Wayland

• RAM: 32GB

What I have tried so far:

1. Disabled the following NVIDIA systemd services to see if it bypasses the hang during resume:

   • nvidia-suspend.service

   • nvidia-hibernate.service

   • nvidia-resume.service

2. Verified that nvidia-persistenced is active (running).

3. Updated GRUB and checked the memory sleep state.

Observations:

• I am running a hybrid graphics setup (AMD + NVIDIA) on Wayland.

• The issue persists even with the 580.x and 590.x driver series.

Question:
Has anyone encountered similar freezing issues with the 7.0 kernel and NVIDIA 580 drivers? Is there any way to fix this issue?

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?

I am trying to use an HP LaserJet 1018 on Ubuntu 24.04 with HPLIP installed, but the printer does not actually print despite being detected.

🧩 Problem description

• The printer is correctly detected by the system (lsusb)

• It appears in the CUPS web interface

• However, when sending a print job:

  • The job stays in “processing”

  • Then disappears without printing

  • No clear error message is shown

🔍 Technical details

✔ USB detection

lsusb

Output includes:

Bus 001 Device 003: ID 03f0:4117 HP, Inc LaserJet 1018

❌ Printing backend issue

lpinfo -v

• No proper USB printer backend is listed

⚙️ CUPS configuration

• Printer is listed in CUPS and Ubuntu's Printers settings Menu

• Driver in use:

  HP LaserJet 1018, hpcups 3.23.12 (and required plugins are installed)
  
  

• Connection URI:

  hp:/usb/HP_LaserJet_1018?serial=...
  
  

Errors shown in CUPS:

Invalid printer command "Clean"

Print job log:

processing...
cfFilterChain: pdftopdf (...) exited with no errors

• Job completes silently but nothing prints

🔧 HPLIP diagnostics

hp-check

Output:

Unable to communicate with device (code=12)
No devices found
Device not found

Also reports:

HPLIP does not support auto installation for Ubuntu 24.04

❓ Question

Why is the printer detected but not able to communicate or print, and how can this be fixed on Ubuntu 24.04? How to set up HP Laser 1018 printer properly on Ubuntu?

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 :-)

Trying to use Ubuntu server for a minecraft server with friends. Not had much luck. Basically when it gets to the DHCP part of the install for the network configuration, there is no IP address and the box above it eth0 says not connected. I don't know how to make it connect. I've tried several options such as using the sudo nano command thing (DHCP is set to true), and when I try to use the resolvconf command it won't let me and says I need to download it, which I can't because of no connection to the internet. I'm using an old laptop, not a desktop, to do this server, and I know it said somewhere a direct connection with an ethernet cable is better, but that's not an option for me. Laptop is an HP Pavilion dm4.

I'm new to linux, so sorry for my little knowledge in advance. Intel AX201 wifi adapter doesn't seem to work properly for me on Ubuntu 22.10. It didn't work so good with windows 10/11 too. Disconnects randomly and I can't get it working again; but when I reboot,it sometimes works for 10 minutes or so and then goes away again. what info should I provide to be able to get any help?

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 have a Kubernetes cluster. I want to find opportunities to contribute to scientific efforts with the compute and memory resources I have available.

I am interested in providing resources for

• math research
• cancer research
• SETI
• and more

Please advise with any recommended

• helm charts
• operators
• manifests

I am especially interested in ones that display performance information to see if the cluster is offering value to the efforts.

Thanks!

I'm searching for a good, simple PDF viewer without javascript support. This link says that Evince does not have javascript support but may in future.

I want a PDF viewer that has no javascript support now and in thefuture. Is Atril the MATE default PDF viewer a good choice? The reason I want this is to avoid PDF JavaScript exploits.

Is there any way that I could use my old Android device by connecting it via USB or even using the wireless LAN and make/receive calls and traditional text messages (SMS) on my laptop running Ubuntu?