Are you on wayland by any chance? I had that same problem and it went away when I changed back to xorg (Debian 12 - KDE - AMD APU)
this post was submitted on 27 Jul 2023
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I'd be happy to receive feedback on the downvote.
Not sure why you got downvoted. Maybe it was the missing period. You know how flaky people can be. Thanks for your comments though and hope life is treating you well otherwise.
Probably a Winblows lover. I'll try to offset the down vote for you.
It's definitely kwin_wayland
that makes me think graphics driver maybe? Check dmesg output right after it happens, you might see something getting reset.
Yes I think I found it, kwin_wayland is segfault'ing randomly, causing the whole session to crash and restart.
Not sure how to fix that though ...
Please start a gdb console for the last crash with coredumpctl debug kwin_wayland, get a backtrace in there with "bt full" and create a bug report with the backtrace at bugs.kde.org
coredumpctl might help, it keeps track of whenever a process just ups and dies hard.