[Solved] Plasmashell crashing after update (X11 + Nvidia)

[Tidal]

Hello everyone,

I use kde plasma with dracut, nvidia and X11.

I see many articles about this issue but always on wayland. I just updated my system using yay, and around 218 packages got updated including linux, linux-headers, nvidia-dkms, plasma, etc. It went fine, but once I rebooted my computer and logged in using sddm into my X11 session, all I got was a black screen with no plasma panel. I could still move the cursor, open konsole with ctrl+alt+t and open applications like the browser, which all work perfectly. But my desktop is blank, I cannot open the application launcher using the meta button, and I get the error message ‘plasmashell closed unexpectedly’ three times every time I log in. Wayland does not work either (never really has), but nvidia-smi works like a charm so the gpu is still recognized. I tried downgrading the linux, linux-headers, nvidia-dkms, nvidia-utils and kwin to previous versions with the same end result. I tried adding nvidia_drm.fbdev=1 to my /etc/kernel/cmdline but there is no visible difference.

Here is the output to inxi -Fxxc0z:
https://0x0.st/X69Y.txt

Here is the output to journalctl -k -b -0:
https://0x0.st/X69g.txt

Here is my /etc/kernel/cmdline:
nvme_load=YES nowatchdog rw root=UUID=7b464e4a-1f0e-4195-bbb6-26ad501e7c8b resume=UUID=6280ed16-fd2b-441e-9781-5632d9737cf8 nvidia-drm.modeset=1

Please let me know if I need to upload anything else. Thank you.

[xircon]

@Tidal

adding nvidia_drm.fbdev=1

Did you rebuild after adding this? (sudo reinstall-kernels).

[Tidal]

Yes, I did. I tried doing it like this too:

dracut --regenerate-all --force

[xircon]

You definitely need nvidia_drm.fbdev=1 on 6.11 kernel, see the pinned post.

Attention Nvidia GPU / Driver users! update to latest kernel and drivers could cause issue on plasma wayland [resolved]

Yeah, I’ve had it while I was still using Windows. But recently I became much more modest, got Linux and decided I’d rather have the best compatibility over raw performance. 7800 XT performance is all I need. Sold it for a good chunk of money, at least. I completely forgot to remove the Nvidia packages before installing the GPU, I was excited to see how Radeon is like on Linux. I realised this mid-installation but I went ahead and installed the GPU regardless. What impressed me is how it worke…

[Tidal]

I did add nvidia_drm.fbdev=1, the issue still persists.

If it helps, this is the crash report created by plasmashell when I log in:
https://0x0.st/X6pz.txt

[Tidal]

I see this line in my journalctl, which I’m pretty sure indicates an issue with the modeset flag

*ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to grab modeset ownership

I don’t understand why this is so, as I’ve appended it to my /etc/kernel/cmdline.

[Tidal]

Another issue that might be related, when the lid of the laptop is closed, the laptop suspends briefly (as expected). But in a couple of seconds, it powers on again, as I can see on my external monitor. This behaviour was not exhibited before said kernel update.

[Tidal]

A few desktop widgets I had installed are incompatible with plasma 6.2. Removing them fixed everything.