https://bugs.kde.org/show_bug.cgi?id=441379
Bug ID: 441379
Summary: Ghost window after closing or moving application
window
Product: kwin
Version: 5.22.4
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: ddascalescu+...@gmail.com
Target Milestone: ---
I haven't had this problem a few days ago, and I haven't changed any settings.
I stopped installing updates because my system was running fine and I feared
updating would screw something up. Ultimately I caved in, and 2 days ago I
installed the latest updates. My fears were founded.
Since then, about once a day, when I close an application (e.g. Firefox or
WebStorm), a ghost window is left on the screen as described in these posts:
-
https://forum.garudalinux.org/t/closing-windows-leaves-them-after-animation-as-a-part-of-the-background/9470
-
https://www.reddit.com/r/kde/comments/ow1g01/possible_kwin_plasma_bug_image_ghosting_after/
It's impossible to clear it (major security issue if sensitive information was
displayed) or interact with it, and after following the advice in the first
post to set the Compositor latency to "Force smoother animations", my system
slowed to a crawl per bug #433166
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 5.22.4
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.3
ADDITIONAL INFORMATION
I have an external display connected to my laptop via USB-C. Both are 4k. No
GPU, just a ThinkPad X1C with Mesa Intel UHD Graphics 620.
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