https://bugs.kde.org/show_bug.cgi?id=453824
Bug ID: 453824
Summary: System hangs occasionally when making windows
fullscreen
Product: kwin
Version: 5.24.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: maugrer...@gmail.com
Target Milestone: ---
SUMMARY
My system hangs when making some windows fullscreen. It's happened most
frequently in mpv when using VA-API but also occurred in Firefox (fullscreen
mode, mouse at top to expose/hide toolbar), Gwenview, wine, and others. This
has happened on all versions of 5.24 (including beta).
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
The system hangs requiring me to hit the reset button. There's nothing in
journal or any other kind of log that I can see. I'll need help figuring out
how to get a useful debug log.
STEPS TO REPRODUCE
As stated, this happens in several applications but most frequently in mpv with
VA-API enabled (rarely without hwdec) so I'll use that:
1. Open a suitable video file (e.g. h264 encoded) in mpv with hwdec enabled (or
press Ctrl+H to enable). Check by pressing I key and look for "(hwdec: vaapi)"
in the "Video:" line.
2. Maximise window (may be optional). Press f key to enable fullscreen.
OBSERVED RESULT
*Sometimes* my system hangs, becoming totally unresponsive to any input and SSH
sessions are terminated/timeout. No option but to hit a physical reset button.
No keyboard shortcuts, e.g. 'REISUB' or Ctrl+Alt+Delete, have any effect.
EXPECTED RESULT
Video (or other application) should continue to play in fullscreen mode.
SOFTWARE/OS VERSIONS
Linux: Manjaro Linux 5.15-5.17 standard kernels, plus 5.17.7-xanmod1-2-x64v2
KDE Plasma Version: 5.23.90-5.24.5
KDE Frameworks Version: 5.91-5.93
Qt Version: 5.15.3
ADDITIONAL INFORMATION
The only thing "special" about my system is it's all AMD (3700X + 6800 XT) and
using a xanmod 'edge' kernel, but this also happened with standard Manjaro
kernels from 5.15-5.17. However, this didn't occur with Plasma 5.23 (excluding
5.24 beta) so I'm not convinced my particular config is the reason. This also
never happened on my Intel laptop. Of course, it could be that something in
Kwin is exposing a bug elsewhere; this is merely a starting point as it's the
only common factor I can think of.
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