After updating my laptop to KDE Plasma 6.5.1 I had a crash in sddm, preventing me from logging in. It resulted in a black sceen with a cursor. The backtrace indicates a GPU driver problem.
(handleContextCreationFailure is always GPU related from what I’m told)
I had found this forum thread, with a similar backtrace, but that was in an older driver and that bug should be fixed. Also, I hadn’t seen this before today.
NVIDIA driver version 570.190
I tried the beta driver (580.95.05), as well as the developer driver (580.94.03). Those caused a crash as well with the same backtrace.
I’m attaching the nvidia-bug-report.log.gz as well as the backtrace (from 570.190). Let me know if there’s anything else that might help. I’m happy to provide more information.