I’m experiencing an annoying problem with Fedora 42.
Sometimes, after the login screen, KDE will take longer than usual to start (I get a black screen for 5-10 seconds, when usually it’s instantaneous).
When this happens, KDE is guaranteed to crash after 1 or 2 minutes. It kicks me back to the login screen but I can’t log in anymore.
The only fix is to reboot the computer and hope that this bug doesn’t re-occur.
Has anybody else experienced this ?
I am currently on kernel 6.17.13-200.fc42.x86_64, with Plasma version 6.5.4.
My GPU is a Radeon RX 9070 XT.
I had very similar problems a few months ago. The symptoms were exactly like you describe above. (Although my GPU is Nvidia and yours is AMD.)
At some point this disappeared. Presumably some update or combination of updates fixed it, but I didn’t nail down exactly what broke it and what fixed it. (I guess it could have been some combination of kernel version, KWin, and/or Nvidia driver.)
Also, I don’t know whether this was the same issue or a different one, but around the same time I had sporadic crashes when resuming from sleep. I was able to mitigate those by setting my wallpaper to a plain colour rather than an image. So that might be worth trying.
In any case, the next step is probably to look at the journalctl logs from the session that crashed, and see what looks suspicious there. After you reboot, sudo journalctl -b -1 will give you the logs from the previous boot.