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My Ubuntu 22.04.2 LTS got stuck in login loop. I did nothing special to cause it (maybe some general Ubuntu updates). I tried suggestions from https://support.system76.com/articles/login-loop-ubuntu/ but nothing helped. Only hint I have now is a log which appeared while I logged into my account through tty without GUI. It informs that Xwayland and gnome-shell tasks are blocked (log below). I tried to switch to Ubuntu on Xorg but nothing changes.

Actual symptoms:

  1. Stuck in login loop
  2. Log info appeared in console:
    [ 363.971410 ] INFO: task Xwayland:2280 blocked for more than 241 seconds.
    [ 363.971454 ] Tainded: G       W  OE        6.2.0-26-generic #26~22.04.1-Ubuntu
    [ 363.971480 ] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables the message.
    [ 363.974889 ] INFO: task gnome-shell:2738 blocked for more than 241 seconds.
    [ 363.974919 ] Tainded: G       W  OE        6.2.0-26-generic #26~22.04.1-Ubuntu
    [ 363.974946 ] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables the message.
  1. Switching between Ubuntu and Ubuntu on Xorg changes nothing
  2. CPU is heavily loaded, top utility shows load_average: 1.00

Runs on Lenovo ThinkPad P14s Gen 21

Graphics:

  1. Intel TigerLake-LP GT2 [Iris Xe Graphics] (VGA compatible controller)
  2. NVIDIA TU117GLM [Quadro T500 Mobile] (3D contoller)
steeldriver
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Piotr Roszkowski
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3 Answers3

1

I found a solution to my problem and I am able to log in normally.

Solution was to remove nvidia driver and install specific one, as described below:

  1. Remove nvidia driver as described here. Judging from journalctl logs there were problem with nouveau (open-source nvidia driver).
sudo apt purge ~nnvidia
sudo apt autoremove
sudo apt clean
  1. Install new driver (help about Nvidia Driver Installation). The hack here was to install specific one (525), due to sudo ubuntu-drivers install which relies on automatic driver detection did not work.
sudo apt update
sudo apt full-upgrade
sudo ubuntu-drivers install nvidia:525
sudo systemctl reboot
Piotr Roszkowski
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Had the same issue, wasn’t able to use ubuntu-desktop but switching to KDE worked if nothing else works.

install KDE-full using:

sudo apt install kde-full

then use sddm instead of gdm.

Hope this helps

Moose2109
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I also had this problem today. Although the Moose2109 solution works, it is not really fixing the problem. The solution is to install the proper nvidea drivers. I installed KDE and then from the GUI I installed the proper nvidea drivers after finding the real issue. However, you can try to run sudo ubuntu-drivers autoinstall or sudo ubuntu-drivers install and then reboot.

André Rosa
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