https://bugs.kde.org/show_bug.cgi?id=449301
Bug ID: 449301
Summary: Stuttering when *not* dragging a window
Product: kwin
Version: unspecified
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-x11-standalone
Assignee: kwin-bugs-n...@kde.org
Reporter: marcmiltenber...@gmail.com
Target Milestone: ---
SUMMARY
In OBS Studio and Chromium at least, sometimes I get a stuttering where the
contents of the window seem to alternate between two frames several times
before using two new frames to stutter on.
When the system is in this state, the only way to recover a smooth output of
the contents of the window is when I attempt to drag the window. As long as I
hold down the left mouse button, the window content is smooth.
When I stop dragging, it stutters again. I can also recover when I close the
stuttering application and restart it.
Since this is hard to describe in words, I have uploaded a video:
https://www.youtube.com/watch?v=9rIKkQ7J-VQ
I'm using Xorg on an AMD RX 5700 XT using the open source driver, kernel
5.16.0-051600-generic.
I'd be willing to test on the new upcoming release if I find a way to install
it on Ubuntu.
STEPS TO REPRODUCE
1. Notice stuttering
2. Drag window and see whether stuttering stops as long as the mouse button is
pressed
2. Stop dragging the window and the stuttering starts again instantly.
OBSERVED RESULT
Stuttering when not dragging a window.
EXPECTED RESULT
No stuttering
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KUbuntu 21.10
(available in About System)
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.12.2
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