https://bugs.kde.org/show_bug.cgi?id=506240
Bug ID: 506240
Summary: Moving cursor in GIMP/Inkscape canvas slowdowns Kwin
Classification: Plasma
Product: kwin
Version First 6.4.1
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Keywords: efficiency-and-performance, wayland-only
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Created attachment 182702
--> https://bugs.kde.org/attachment.cgi?id=182702&action=edit
Moving cursor in Gimp canvas
When I move cursor inside GIMP or Inkscape canvas, kwin skips frames including
cursor and uses much higher CPU (50% of 1 thread). This is noticeable on
monitors with high refresh rate such as mine which has 360Hz.
STEPS TO REPRODUCE
1. Open Gimp or Inkscape on a high refresh rate monitor (>= 240 Hz)
2. Open vkcube or glxgears on the same monitor with MangoHUD overlay
3. Move the cursor inside the canvas of Gimp or Inkscape
OBSERVED RESULT
MangoHUD overlay shows ~220-240 FPS and a non flat graph
The cursor skips frames
EXPECTED RESULT
MangoHUD overlay shows 360FPS and a flat graph
The cursor doesn't skip frames
SOFTWARE/OS VERSIONS
Linux 6.15.3-arch1-1
Plasma 6.4.1
CPU: AMD Ryzen 7 3700X
GPU: Nvidia GeForce RTX 2080 SUPER
ADDITIONAL INFORMATION
Gnome Wayland is not affected by this issue.
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