https://bugs.kde.org/show_bug.cgi?id=481716
Bug ID: 481716
Summary: KWin drops frames on nvidia (Wayland)
Classification: Plasma
Product: kwin
Version: 5.93.0
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: t...@nitrosubs.live
Target Milestone: ---
SUMMARY
There seem to be weird frame drops when using KWin on an Nvidia dGPU (on
Wayland).
Adaptive sync on/off doesn't matter.
STEPS TO REPRODUCE
1. Move the cursor in a circular fashion
or
2. Launch testufo.com
OBSERVED RESULT
In the case of cursor motion, there are "dropped" cursor images (persistent
vision; better visible on 120Hz+).
With UFOTest, stuttering is noticeable.
(Does not happen on AMD/Intel)
EXPECTED RESULT
Everything should be smooth.
SOFTWARE/OS VERSIONS
Arch Linux
KDE Plasma Version: 5.93.0
KDE Frameworks Version: 5.249.0
Qt Version: 6.7.0
Kernel Version: 6.7.5-arch1-1 (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
I use the nvidia-open-beta modules and nvidia-utils-beta (550.40.07) because my
GPU does not work on 545 (too old drivers). KWin was launched with the DRM
device env var set to just the nvidia card (/dev/dri/card1, since I also have
an AMD GPU in my PC).
Is this something that can be fixed in KWin or is it an nvidia specific bug?
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