https://bugs.kde.org/show_bug.cgi?id=487840
Bug ID: 487840
Summary: Certain games have very low framerate under Wayland,
yet both the games and KWin report normal FPS
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.1
Platform: Gentoo Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: performance
Assignee: kwin-bugs-n...@kde.org
Reporter: anhollander...@gmail.com
Target Milestone: ---
SUMMARY
After upgrading my Gentoo system from Plasma 5.27 to 6.1 beta (6.0.90), both
Genshin Impact and Honkai: Star Rail have poor performance under Wayland.
Despite this, the DXVK FPS counter reports a stable 60 FPS with no stutters,
and KWin's "Show FPS" effect reports 75 FPS (75 Hz monitor, changing it to 60
Hz did not help) that sometimes drops to around 60. I am not sure how to
measure this, but it feels like it is below 30 FPS. The framerate drops more
when there is more complex movement on the screen.
STEPS TO REPRODUCE
1. Have a system with Plasma 6.1 beta (6.0.90) running the Wayland session
2. Grab one of these games from Lutris or using the respective launcher from
https://github.com/the-anime-team. It currently defaults to
Wine-staging-tkg-9.8 and DXVK 2.3.1.
3. Run the game
OBSERVED RESULT
The game is not running smoothly despite FPS counters saying it is.
EXPECTED RESULT
The game runs smoothy.
SOFTWARE/OS VERSIONS
Linux: Gentoo Linux 2.15 (6.9.3-tkg-bore-latency)
KDE Plasma Version: 6.0.90
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1
ADDITIONAL INFORMATION
I don't have other games to reproduce this with. I tried with Little Kitty, Big
City and it ran fine, but it's a much lighter game. Definitely worth more
investigation.
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