Bug 470064

Summary:	"Moving" unmaximized windows on crash recovery
Product:	[Plasma] kwin	Reporter:	Holger <private_lock>
Component:	decorations	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	CONFIRMED ---
Severity:	minor	CC:	kde, nate
Priority:	NOR
Version First Reported In:	5.27.4
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	little animation

Description Holger 2023-05-20 20:55:45 UTC

Created attachment 159152 [details]
little animation

SUMMARY

On reproducing the crash for bug 469908 several times, I found my non-maximized windows are moving. It seems, the window decorations are not properly accounted for. So for each crash, the window jumps up / left by the thickness of the title-bar / its dragable border.

STEPS TO REPRODUCE
1. Setup a screen with some unmaximized windows/dialogs (e.g. Konsole, KMahjongg, KNotes, ...)
2. take first screenshot
3. kill -s 11 $(pidof kwin_x11)
4. take second screenshot

OBSERVED RESULT
The screenshots show some movement shifting some windows / dialogs potentially off screen

EXPECTED RESULT
Don't move.

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 23.04
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
Kernel Version: 6.2.0-20-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-4700MQ CPU @ 2.40GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 4600
Manufacturer: Micro-Star International Co., Ltd.
Product Name: GE70 2OC\2OD\2OE
System Version: REV:1.0

ADDITIONAL INFORMATION
- KNotes seems immune, as it doesn't have decorations.
- Also Signal seems protected, as I have a window-rule to set it's position on initialization.
- And finally maximized windows likely ignore positioning and just set their state as maximized requesting all the screen.