Hello,
We are experiencing the login loop problem, presumably after the last system update.
Everything was working fine (driver, CUDA and CuDNN is installed) until last system upgrade, but now something broke. I already tried common solution found googling like permission on /tmp folder and .XAuthority (which is not existing), then when I tried nvidia-smi I got error: NVIDIA - SMI has failed because it couldn’t communicate with the NVIDIA driver . Make sure that the latest NVIDIA driver is installed…" so now I think that some part of the upgrade broke nvidia driver…
Attached the nvidia-bug-report. Any help?
Hi, at the end I solved my problem.
That was not my computer so it was a little bit tricky to undestand what they did… Anyway I realized the driver was installed using the .run installer a couple of years ago, while there was a recent system upgrade. I think since the driver was never updated a 2-year mismatch between driver and xorg packages version was the caused the issue. I first uninstalled the driver using nvidia-uninstall , this gave me warnings about driver installation altered and about it cannot restore the original xorg configuration (backup was not made). Loop persisted. Then I deleted /etc/modprobe.d/blacklist-nvidia-nouveau.conf that was created according to Installation Guide Linux :: CUDA Toolkit Documentation. Loop persisted. At this point i realized that there was another file blacklisting nouveau and was /etc/modprobe.d/nvidia-installer-disable-nouveau.conf I deleted that file too… reboot and GUI was back with nouveau.
I then installed latest driver using sudo ubuntu-drivers autoinstall and now everything is working!