https://bugs.kde.org/show_bug.cgi?id=468280
Bug ID: 468280
Summary: Kwin freeze when playing, and in particular, when
exiting videos
Classification: Plasma
Product: kwin
Version: 5.27.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: simon.adr...@ieee.org
Target Milestone: ---
Created attachment 157953
--> https://bugs.kde.org/attachment.cgi?id=157953&action=edit
Output of journald after last crash, filtered for kwin messages.
SUMMARY
***
I am on a Lenovo X13 Gen 3 AMD running ArchLinux with open source video drivers
only.
When I watch a video on, for example, Youtube in full screen mode, the video
begins to stutter quite from the beginning and it gets worse when I exit by
double clicking. If I go to full screen again or I simply wait too long for
exiting, it is too late and a total freeze happens.
With VLC the situation is better, but typically, after like an 1h or so of
watching a video, I end up with a freeze too. Going back and forth to full
screen seems to cut down the time till the total freeze happens.
***
STEPS TO REPRODUCE
1. Use a browser (tried both Chrome and Firefox)
2. Go to Youtube and start any video
3. Go back and forth to full screen
OBSERVED RESULT
After at most a few seconds the screen will freeze
EXPECTED RESULT
The video should play without any stuttering or screen freezing
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: ArchLinux
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
The problem persists at least since version 5.27.0, but maybe even since 5.26.0
ADDITIONAL INFORMATION
1) Under Gnome everything works as expected, so I would exclude hardware
problems
2) When I use additional external screens, the problem does *not* exist
3) I normally use 150% scaling throughout all my screens. Going back to 100%
did not change the situation (I logged out and logged in again to make sure
everything is consistent).
4) I found today this report: https://bugs.kde.org/show_bug.cgi?id=466238
where a similar freeze is describe, however, it occurs in this case only if
multiple screens are used.
Nonetheless, as suggested in this report, putting KWIN_DRM_NO_DIRECT_SCANOUT=1
into /etc/environment fixes also my problem.
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