https://bugs.kde.org/show_bug.cgi?id=475468
Bug ID: 475468
Summary: Window and panel resizing is very laggy
Classification: Plasma
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: m...@ratijas.tk
Target Milestone: ---
SUMMARY
The lag and jitter during panel floating and defloating has gotten much worse
recently. Not sure whether to attribute it to panels refactoring or a random
NVIDIA driver update. The lag makes fullscreen effects such Desktop Grid and
Overview open practically without animation; everything is a slideshow running
in seconds per frame when a panel or window resizes.
Note that in case or maximizing a window in a way that does not involve panel
(de-)floating (say, horizontally with a bottom panel) only skips first couple
of frames due to a window being resized only once, and then simply cross-fading
inside compositing.
STEPS TO REPRODUCE
1. Run Plasma 6 on X11 with NVIDIA
2. Set panels floating to auto.
3. Move windows around, touching panels borders, so they float/defloat; add
virtual desktops, have a window that touches a panel on one of them, the other
is empty, and Slide between them.
OBSERVED RESULT
LL..aaag g gggggg
EXPECTED RESULT
No lag
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.80
KDE Frameworks Version: 5.240.0
Qt Version: 6.5.3
Kernel Version: 6.5.5-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2
ADDITIONAL INFORMATION
Screen recording on YouTube: https://www.youtube.com/watch?v=uDtBd3sOm5I
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