https://bugs.kde.org/show_bug.cgi?id=421135
Bug ID: 421135
Summary: Flickering Issue with Blur enabled
Product: kwin
Version: 5.18.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: mattyhoffm...@gmail.com
Target Milestone: ---
Created attachment 128213
--> https://bugs.kde.org/attachment.cgi?id=128213&action=edit
Screenshot of dark object flickering on application launcher
SUMMARY
Geometric objects occasionally flicker on transparent UI elements such as
window decorations, widget popups (calendar, clipboard, sound, etc.)
application launchers, konsole and others.
Have noticed this using default Breeze themes but is more noticeable with the
Breeze Krystal Light theme enabled as that adds more transparency than usual.
Has happened to me on Arch, Manjaro, Debian and Kubuntu all on different
machines using Intel or NVIDIA graphics (the latter of which on the proprietary
driver).
I am unsure how to reproduce this consistently, but I have noticed it happen
over windows such as VSCode (seen in the screenshot), Firefox, Dolphin and
Discord so am unsure as to whether a specific application triggers it.
STEPS TO REPRODUCE
1. Open an application
2. Open a transparent menu on top of it
3. See if flickering occurs
OBSERVED RESULT
Dark geometric objects occasionally flicker (not often, it's quite rare but as
seen in the screenshot it does happen)
EXPECTED RESULT
Consistent blur with no dark flickering objects.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.2
ADDITIONAL INFORMATION
Could reproduce on OpenGL 3.1, 2.0 but not on XRender. Only happens when Blur
is enabled.
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