Bug 514225 - Regression: Maximized screens do not change geometry on display change without window decorations
Summary: Regression: Maximized screens do not change geometry on display change withou...
Status: REPORTED
Alias: None
Product: kwin
Classification: Plasma
Component: multi-screen (other bugs)
Version First Reported In: 6.5.4
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-01-06 14:04 UTC by Erik Quaeghebeur
Modified: 2026-01-06 14:04 UTC (History)
0 users

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Description Erik Quaeghebeur 2026-01-06 14:04:35 UTC 
SUMMARY
I often maximize windows and then toggle their decorations off (F10 shortcut). When changing displays (external → laptop → external), those windows keep their size and so do not remain maximized. Windows with decorations do stay maximized, i.e., change their size to adapt to what maximal means on the new display.

STEPS TO REPRODUCE
1. Open window, maximize, F10
2. Change primary display

OBSERVED RESULT
Window not maximized, keeps size

EXPECTED RESULT
Window remains maximized, size adapted

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1