https://bugs.kde.org/show_bug.cgi?id=527753
Bug ID: 527753
Summary: Triple buffering causes stuttering on Nvidia
Classification: Plasma
Product: kwin
Version First 6.8.1
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: performance
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
DESCRIPTION
Triple buffering causes stutters / dropped frames when moving mouse cursor,
moving / resizing windows, scrolling, etc. This seems to be happening only on
Nvidia GPUs. When I try connecting my monitor to the motherboard which outputs
signal from my AMD iGPU, everything looks fine.
STEPS TO REPRODUCE
1. Run KDE Plasma like normal with Nvidia GPU.
2. Open multiple windows of any programs and try moving / resizing them.
OBSERVED RESULT
The window movement and cursor stutters, looks as if it was moving at half the
monitor's refresh rate.
EXPECTED RESULT
The windows and cursor move smoothly at the monitor's refresh rate.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 44
KDE Plasma Version: 6.8.1
KDE Frameworks Version: 6.31.0
Qt Version: 6.11.2
Kernel Version: 7.2.11-200.fc44.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor
Memory: 32 GiB of RAM (30.4 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 5070 Ti
Graphics Processor 2: AMD Ryzen 5 7600X 6-Core Processor
Manufacturer: ASRock
Product Name: B650M-HDV/M.2
ADDITIONAL INFORMATION
I am using Nvidia drivers from RPM Fusion, driver version is 615.78.08.
KWIN_DRM_DISABLE_TRIPLE_BUFFERING=1 works as a workaround.
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