SUMMARY When desktop is zoomed in using the Zoom (Accessibility) desktop effect, pressing Alt-Tab to invoke the task switcher crashes the session. I can reproduce it quite consistently with different visualizations (e.g. Breeze) on Wayland, but not X11. This is particularly troublesome for users with low-vision who use Zoom regularly. STEPS TO REPRODUCE 1. Start Plasma Wayland session. 2. Partially zoom in on the desktop using Zoom desktop effect. 3. Hit Alt-Tab to invoke task switcher. OBSERVED RESULT Desktop session crashes. EXPECTED RESULT Task switcher should appear and work. SOFTWARE/OS VERSIONS Windows: N/A macOS: N/A Linux/KDE Plasma: Arch Linux (available in About System) KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Sorry, can't seem to get backtrace, but it is easily reproducible from what I can tell.
Cannot reproduce on current git master. I'm afraid we'll need that backtrace. :) https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
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Hi. It is still happening for me. I read the wiki, but I'm unsure how to get a backtrace when Plasma itself crashes (as opposed to an app). There's no crash report dialog after it restarts (other than Akonadi, but that's probably unrelated). Any suggestions? Also, I'm on Arch so I don't think I can get debug packages without replacing my entire KDE installation. :-/
(In reply to Rob Hasselbaum from comment #3) > Hi. It is still happening for me. I read the wiki, but I'm unsure how to get > a backtrace when Plasma itself crashes (as opposed to an app). There's no > crash report dialog after it restarts (other than Akonadi, but that's > probably unrelated). Any suggestions? > > Also, I'm on Arch so I don't think I can get debug packages without > replacing my entire KDE installation. :-/ can you check coredumps? `coredumpctl list kwin_wayland`, then `coredumpctl gdb <pid>`. I can't reproduce the issue similar to Nate.
Created attachment 145346 [details] kwin_wayland coredump_gdb Reproduced today. PID 1518. Here's the output from "coredumpctl gdb 1518 >kwin_wayland_coredump_gdb". Hopefully, it's helpful. I don't see debug symbols.
Yeah, the backtrace misses the most important stuff. It seems like it's something about opengl context. There was an issue about opengl context handling in the zoom effect, unfortunately that fix is only in git master. If it's not possible to get debug symbols, I suggest to check if the issue is fixed in 5.24 or its beta.
OK, I will wait for 5.24 to hit Arch repos and try again.
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Waiting on release of Plasma 5.24 to Arch repos to see if it fixes it. Will update then.
This does seem to be fixed in 5.24. 😊 I've tried a bunch of times and I'm unable to reproduce the crash now. Thanks!