https://bugs.kde.org/show_bug.cgi?id=487605
Bug ID: 487605
Summary: XWayland Vulkan fifo vsync limits at doubled maximum
refresh rate with VRR since KWin 6.1 beta 1
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.1
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
My display's maximum refresh rate is 165Hz, but fps get capped at 330fps since
KWin 6.1 beta 1.
STEPS TO REPRODUCE
1. Leave VRR at auto default
2. Start a game in Proton with e.g. VKD3D-Proton
3. In the game, enable vsync
OBSERVED RESULT
Frame rate gets capped at maximum refresh rate multiplied with 2. With VRR set
to "never" in KWin settings, vsync correctly caps the fps at the display's
exact maximum refresh rate also with KWin 6.1 beta 1.
EXPECTED RESULT
Like with 6.0, fifo vsync should cap at the exact maximum refresh rate, also
with VRR enabled.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.9.2
KDE Plasma Version: 6.1 beta 1
KDE Frameworks Version: 6.2
Qt Version: 6.7.1
ADDITIONAL INFORMATION
Radeon RX 7800 XT
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