https://bugs.kde.org/show_bug.cgi?id=423008
Bug ID: 423008
Summary: Task switcher renders incorrectly and behaves
strangely
Product: kwin
Version: 5.19.0
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: ber...@codewiz.org
Target Milestone: ---
Created attachment 129383
--> https://bugs.kde.org/attachment.cgi?id=129383&action=edit
the task switcher in one of the odd states described in the bug
Sorry for the lack of specificity: the exact behavior varies between sessions
and I couldn't pinpoint how to trigger the same bug on another machine.
SUMMARY
Switching applications with alt-tab has become tricky: often, the switcher
displays a single entry for "Show Desktop" (even if the option to include Show
Desktop is unchecked).
Sometimes, the switcher appears with transparent background or other rendering
artifacts. I haven't been able to reproduce this in a couple of weeks.
When I hit alt-tab and release it, the desktop is indeed revealed.
When I hit alt-tab again, sometimes the windows come back, and sometimes they
start coming back, but as soon as I release alt-tab the desktop is shown again.
STEPS TO REPRODUCE
No idea! It just started happening 1 month ago, and I tried selecting different
visualizations and fiddling with the other settings, to no use.
However, this is what I know:
- I can only reproduce this on my Arch Linux box, not on Fedora 32
- It is unrelated to using 30bpp
- The bug shows with or without compositing
- I think it first appeared when I upgraded to qt 5.15
- I had this bug with plasma 5.18.x, and upgrading to 5.19 didn't fix it
- It happened with KF 5.70 and KF 5.71
- Also happens with kwinft built from git master
- I checked for conflicting shortcuts, and there aren't any
SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.19
KDE Frameworks Version: 5.71
Qt Version: 5.15
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