https://bugs.kde.org/show_bug.cgi?id=490358
Bug ID: 490358
Summary: Jerky/stuttering graphics in Plasma 6 with Intel GPU
Classification: Plasma
Product: kwin
Version: 6.1.2
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: mich...@michaelmarley.com
Target Milestone: ---
SUMMARY
After upgrading from Plasma 5 to Plasma 6 (currently 6.1.2), I am experiencing
jerky animation and frame drops in applications that were previously smooth. I
have seen this on Intel GPUs from multiple generations (including but not
limited to Broadwell and Coffee Lake), but I have not seen it on an AMD GPU.
STEPS TO REPRODUCE
1. Start Plasma 5 (Wayland session)
2. Launch vkcube-wayland
3. Watch it for a bit. Sometimes waving the cursor or dragging another window
around will induce the jerkiness.
OBSERVED RESULT
The framerate occasionally falls to 30fps for very short intervals and/or
frames are dropped, resulting in jerky motion.
EXPECTED RESULT
The framerate should stay at 60fps and frames should not be dropped.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 6.10
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.4.0
Qt Version: 6.6.2
ADDITIONAL INFORMATION
I think this may have something to do with the removal of the kwin latency
setting and the autodetection of latency, as the jerkiness and stuttering I am
seeing now closely mirrors what I would see with Plasma 5 if I set the latency
to anything lower than maximum.
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