https://bugs.kde.org/show_bug.cgi?id=506038
Bug ID: 506038
Summary: Applications slow down when moved to a off-screen
virtual desktop
Classification: Plasma
Product: kwin
Version First 6.4.0
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: performance
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
When moving an application to a different virtual desktop, applications appear
to become heavily frame limited. This can most easily be observed with games.
I could so far reproduce this problem with a free idle game on Steam, a Bevy
example game, and a YouTube video playing in Firefox.
STEPS TO REPRODUCE
1. Open an application that is known to have this problem
2. Move the application to an off-screen virtual desktop or switch to one
3. Open the overview (Meta+W) and notice that the preview has a very low frame
rate
OBSERVED RESULT
Applications are being frame limited when off-screen
EXPECTED RESULT
Applications behave as normal, even when off-screen
SOFTWARE/OS VERSIONS
Operating System: NixOS 25.11
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.0
Kernel Version: 6.12.31-xanmod1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor
Memory: 32 GiB of RAM (31,1 GiB usable)
Graphics Processor: AMD Radeon RX 7800 XT
Manufacturer: ASUS
ADDITIONAL INFORMATION
Example video demonstration of the issue: https://youtu.be/PDH7dsB6fwQ
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