Bug 460430 - WindowHeap-based effects + Multimonitor: Dragging and dropping Thunderbird's window between VDs / screens sometimes renders the window off-screen
Summary: WindowHeap-based effects + Multimonitor: Dragging and dropping Thunderbird's ...
Status: RESOLVED WORKSFORME
Alias: None
Product: kwin
Classification: Plasma
Component: effects-window-management (other bugs)
Version First Reported In: 5.27.2
Platform: openSUSE Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-10-14 12:50 UTC by postix
Modified: 2025-10-16 14:05 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Screenshot: 5.26.0, Thunderbird (1.04 MB, image/jpeg)
2022-10-14 12:50 UTC, postix 		Details
kWin Support Info (7.20 KB, text/plain)
2022-10-14 12:50 UTC, postix 		Details
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Description postix 2022-10-14 12:50:19 UTC 
Created attachment 152812 [details]
Screenshot: 5.26.0, Thunderbird

STEPS TO REPRODUCE
1. Two screens: 4k@200%, 2k@100%
2.  Open Thunderbird
3.  Open e.g. the desktop grid effect or the present windows effect
4. Drag and drop Thunderbird's window between the VDs (e.g. 4x4 grid)

OBSERVED RESULT
At some point Thunderbird's window disappears in the effect. Only it's highlighting and symbol remains.
Sometimes the upper part window can be found at lower edge of the screen.

I could not observe this, when using a single monitor setup.



SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20221012
KDE Plasma Version: 5.26.0
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6
Kernel Version: 6.0.0-1-default (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 580 Series
Comment 1 postix 2022-10-14 12:50:35 UTC 
Created attachment 152813 [details]
kWin Support Info
Comment 2 postix 2022-10-14 12:51:35 UTC 
I run `MOZ_ENABLE_WAYLAND=1 thunderbird %u`