https://bugs.kde.org/show_bug.cgi?id=485144
Bug ID: 485144
Summary: VRR stuttering and backlight flicker due to unstable
target refresh rate
Classification: Plasma
Product: kwin
Version: 6.0.3
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: ataberkozen...@gmail.com
Target Milestone: ---
Edited and partial copy-paste from reddit comment:
Sometimes VRR starts to jump around target refresh rate and depending on how
bad these jumps get, monitor starts to flicker as addition to stutter-like
behaviour.
For example a mild case may be a 60 fps video playing and vrr jumps between 57
to 63hz, which still ends up very mildly stuttering but monitor backlights
don't flicker so it's not really bothersome. But there are cases when in same
example, it jumps randomly to any refresh rate (60,50,63,165 e.g) resulting in
heavy backlight flickering.
Gamescope's embedded mode doesn't suffer from this issue and refresh rates are
so stable that I would say it's perfect. Maybe it works so well because
gamescope bypasses XWayland?
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.3
Kernel Version: 6.8.4-1-clear (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5700X 8-Core Processor
Memory: 31,3 GiB of RAM
Graphics Processor: AMD Radeon RX 6800
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