Bug#948195: nvidia-legacy-340xx-driver: Xorg fails to start with a kernel panic after the upgrade to 340.108-1

[jim_p]

Package: nvidia-legacy-340xx-driver
Version: 340.108-1
Severity: grave
Justification: renders package unusable

Dear Maintainer,

After todays upgrade to 340.108, the system fails to boot in the desktop
enviroment and dmesg reports a kernel panic, as seen on the paste here
https://paste.debian.net/1124712

The lockup is so bad that even ssh-ing to the machine and issuing a reboot does
not work, so I had to reisub out of it every time.
Disabling the display manager (lightdm) and booting to command line works, but
the same happens as soon as I use startx.

Downgrading to kernel 5.3 does not solve the problem and I had to complete
remove nvidia and use nouveau to get back to the desktop and write this bug
report. Now I am trying to install 340.107 from the snapshot repo, but it will
take a lot of time as it seems because of the many dependencies.

Thank you in advance.



-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.4.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages nvidia-legacy-340xx-driver depends on:
pn  nvidia-installer-cleanup                                             <none>
pn  nvidia-legacy-340xx-alternative                                      <none>
pn  nvidia-legacy-340xx-driver-bin                                       <none>
pn  nvidia-legacy-340xx-driver-libs                                      <none>
pn  nvidia-legacy-340xx-kernel-dkms | nvidia-legacy-340xx-kernel-340.10  <none>
pn  nvidia-legacy-340xx-kernel-dkms | nvidia-legacy-340xx-kernel-340.10  <none>
pn  nvidia-legacy-340xx-vdpau-driver                                     <none>
pn  nvidia-support                                                       <none>
pn  xserver-xorg-video-nvidia-legacy-340xx                               <none>

Versions of packages nvidia-legacy-340xx-driver recommends:
pn  nvidia-persistenced           <none>
pn  nvidia-settings-legacy-340xx  <none>

Versions of packages nvidia-legacy-340xx-driver suggests:
pn  nvidia-legacy-340xx-kernel-dkms | nvidia-legacy-340xx-kernel-source  <none>