https://bugs.kde.org/show_bug.cgi?id=511593
Bug ID: 511593
Summary: Restoring a maximized window in windowed state causes
visual glitch
Classification: Plasma
Product: kwin
Version First 6.5.0
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: core
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Going from a maximized window to a non maximized window causes a very brief
visual glitch. The window will be redrawn in its windowed size in the top left
corner of the monitor on top of the currently drawn window, and this state will
last for at least a frame (I saw it on a 60 hz recording of my 240 hz screen).
Important note : I have all relevant desktop effects disabled, and my global
animation speed is instant.
STEPS TO REPRODUCE
1. Have animation speed to the "instant" speed, and relevant desktop effects
disabled (I don't know them, since I disabled them every since I started using
kde and never reenabled them.
2. Have a maximized window on a monitor.
3. Drag the window using the top bar to make it windowed.
OBSERVED RESULT
The window will be redrawn in its windowed size in the top left corner of the
monitor on top of the currently drawn window, causing a visual glitch (a
"flash").
EXPECTED RESULT
The window should jump to its windowed state without being redrawn this way,
instantly.
SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux
KDE Plasma Version: 6.5.1
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
ADDITIONAL INFORMATION
I've never noticed this happening before upgrading to 6.5, so i'm pretty sure
it's a new bug that appeared in 6.5.
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