https://bugs.kde.org/show_bug.cgi?id=483411
Bug ID: 483411
Summary: KWin Wayland with Nvidia leads to weird shuttering for
certain proton game (逆転裁判456 or Apollo Justice: Ace
Attorney Trilogy)
Classification: Plasma
Product: kwin
Version: 6.0.1
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: quwenruo.bt...@gmx.com
Target Milestone: ---
SUMMARY
When using Kwin from 6.0.1, Wayland session, with Nvidia closed-source driver
(tried both nvidia-open and nvidia) and high refresh rate monitors (no VRR,
tried both 120hz and 165hz), the game 逆転裁判456 (Apollo Justice: Ace Attorney
Trilogy) would shutter heavily.
On the other hand, if switching back to X11 session, the problem is just gone
without any other setting change.
STEPS TO REPRODUCE
1. Install KDE 6.0.1
2. Use steam to lauch Apollo Justice: Ace Attorney Trilogy
OBSERVED RESULT
The game shutters heavily (looks like bad vsync, older frames can sometime show
up) in Wayland session
EXPECTED RESULT
The game doesn't shutter at all in both Wayland and X11 sessions.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Archlinux KDE 6
KDE Plasma Version: 6.0.1
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
ADDITIONAL INFORMATION
It looks like using gamescope can solve the shuttering, but gamescope has its
own bugs.
It looks like monitor refresh rate is not involved, 60Hz can still reproduce
the bug.
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