https://bugs.kde.org/show_bug.cgi?id=515568
Bug ID: 515568
Summary: The blur effect updates only partially
Classification: Plasma
Product: kwin
Version First 6.5.5
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
The blur effect updates only partially for a surface, which is especially
noticeable during video playback and low blur intensity + high opacity values
STEPS TO REPRODUCE
1. Edit /usr/share/plasma/desktoptheme/default/plasmarc to remove the contrast
effect for better visibility (set it to false)
2. Reload the Breeze theme
3. Set the blur and noise strength values to the 7th position
4. Open a window that's constantly updating (like Firefox/Chromium/whatever
playing a video)
5. Open Konsole, enable the background blur effect and set the background
opacity to ~40-50%
6. Move the Konsole window so that it's on top of the updating window but
doesn't fully cover it
OBSERVED RESULT
There is a seam where the blur effect "cuts off" where the underlying window's
edges end due to partial effect repaints
EXPECTED RESULT
There should be no seam visible at all
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2
Kernel Version: 6.18.7-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800X 8-Core Processor
Memory: 64 GiB of RAM (62.7 GiB usable)
Graphics Processor: AMD Radeon RX 9070
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