https://bugs.kde.org/show_bug.cgi?id=466597
Bug ID: 466597
Summary: Popup windows sometimes glitch desktop background as
content when appearing
Classification: Plasma
Product: kwin
Version: 5.25.2
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: dsyrzm...@mozmail.com
Target Milestone: ---
Created attachment 156825
--> https://bugs.kde.org/attachment.cgi?id=156825&action=edit
Popup appearing, slowed to 15% speed
SUMMARY
***
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***
Maybe every 20th time, sometimes even more frequently (very random), when
opening popups of various applications, they visually flicker disturbingly,
this happened for me in jetbrains rider, vscode and unity3d so far. In IDEs
it's especially disturbing as auto completion opens and closes popups at a high
rate, making this glitch occur quite a lot more frequently.
While recording it i noticed that when it glitches it actually just shows the
top left of my desktop.
Enabled related desktop effects are "Fading Popups Kinetic" (installed) and
background contrast and , but this also happens without any of them enabled,
it's just visible for like a single frame instead of a few in that case.
STEPS TO REPRODUCE
1. open popups in one of the mentioned applications repeatedly
2. Notice it sometimes rendering the desktop into the window content for a
short period
3. acknowledge it as an issue
OBSERVED RESULT
(At random times) flickering popups, rendering the desktop as content briefly
before showing their actual content
EXPECTED RESULT
Smooth, non-glitchy popups, rendering their own content or a default color or
what's actually behind their rectangle from the start
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 22.10
(available in About System)
KDE Plasma Version: 5.25.2
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
ADDITIONAL INFORMATION
I'm not sure if kwin or compositing is the correct category for this issue, as
i don't have the technical knowledge about what makes up my desktop internally;
it might be related to something completely different, it just seemed correct
to me.
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