https://bugs.kde.org/show_bug.cgi?id=507434
Bug ID: 507434
Summary: When a desktop widget is animating the GPU usage is
higher than the same widget placed in a Panel
Classification: Plasma
Product: plasmashell
Version First master
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Containment
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
Created attachment 183483
--> https://bugs.kde.org/attachment.cgi?id=183483&action=edit
test widget to reproduce the bug
SUMMARY
When a widget that is constantly animating is placed on the Desktop, it uses
more GPU compared to when placing the same widget inside a Panel
STEPS TO REPRODUCE
1. Download the attached widget and install it
2. Place the widget in the panel and desktop
3. Use a software capable of monitoring the usage of the GPU used for rendering
KWin/Plasmashell, refer to the output of `qdbus org.kde.KWin /KWin
org.kde.KWin.supportInformation | grep -i '^opengl'`
4. Click on the test widget to toggle the BusyIndicator
5. Compare the GPU usage of each widget animating, one at a time
OBSERVED RESULT
When the desktop widget is animating the GPU usage is higher compared the usage
of the same widget placed in the Panel
EXPECTED RESULT
Desktop widget should exhibit roughly the same GPU usage on both desktop and
panel
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.4.80
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1
Kernel Version: 6.15.7-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i7-9750H CPU @ 2.60GHz
Memory: 32 GiB of RAM (31.1 GiB usable)
Graphics Processor: Intel® UHD Graphics 630
ADDITIONAL INFORMATION
This was initially reported in a audio visualizer widget
https://github.com/luisbocanegra/kurve/issues/40 and upon investigation it
appears to affect any QML type displayed on the desktop widget as long as it is
updating fast enough
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