https://bugs.kde.org/show_bug.cgi?id=495367
Bug ID: 495367
Summary: Adaptive Sync (VRR) not working after update 6.2.2
Classification: Plasma
Product: kwin
Version: 6.2.2
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: cannu...@keemail.me
Target Milestone: ---
SUMMARY
I would like to report a bug with FreeSync (VRR) in KDE Plasma 6.2.2. I
experience screen tearing while gaming, despite having the Plasma adaptive sync
setting set to automatic or enabled. Using Gamescope with the --adaptive-sync
parameter resolves the issue, indicating a Plasma-specific problem. I have
tested this on three similar AMD setups, including one fresh install, and the
issue persists
STEPS TO REPRODUCE
1. Open Display Settings
2. Set adaptive sync to automatic or always on
3. Play a game like Baldur's Gate 3, or any other isometric title
OBSERVED RESULT
Screen tearing occurs while moving the camera with the mouse or arrow keys,
both vertically and horizontally.
EXPECTED RESULT
No screen tearing should occur while moving the camera with the mouse or arrow
keys.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Archlinux/KDE Plasma
KDE Plasma Version: 6.2.2
KDE Frameworks Version: not installed
Qt Version: 5.15.15
ADDITIONAL INFORMATION
I have restarted several times and tested three different PCs. FreeSync appears
to work better in third-person games like Cyberpunk 2077 and The Witcher 3,
where tearing is less noticeable. However, in isometric games like Baldur's
Gate 3 and Divinity: Original Sin 2, screen tearing is prominent during camera
movements.
Tearing is less noticeable at lower frame rates (60-80 FPS) and more apparent
at 140-165 FPS. I use Mango to lock the frame rate to 165 Hz (my monitor's
refresh rate) and have tried lowering the cap to 160 and 150, but that didn’t
help.
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