https://bugs.kde.org/show_bug.cgi?id=482677
Bug ID: 482677
Summary: Mouse stuttering when GPU usage is high and Hardware
acceleration is used
Classification: Plasma
Product: kwin
Version: 5.27.10
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: input
Assignee: kwin-bugs-n...@kde.org
Reporter: zastrixarund...@gmail.com
Target Milestone: ---
SUMMARY
When GPU usage is high (mostly in games) the mouse cursor stutters when it's
hardware accelerated. Making the mouse software accelerated with
`KWIN_FORCE_SW_CURSOR=1` fixes the issue (but created artifacts).
STEPS TO REPRODUCE
1. Run a game
2. Uncap FPS to have GPU usage around 99%
3. Mouse stuttering (outside of game even)
4. Enable SW acceleration
5. No stutter on 99% GPU usage
OBSERVED RESULT
System stuttering
EXPECTED RESULT
No stutters (maybe some but not like this)
SOFTWARE/OS VERSIONS
Linux: ostree-image-signed:docker://ghcr.io/ublue-os/kinoite-main:latest
(available in About System)
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.12
ADDITIONAL INFORMATION
There's a reddit post with this issue as well:
https://www.reddit.com/r/linux_gaming/comments/19694tk/everything_gets_laggy_when_gpu_gets_close_to_100/
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