Bug 440747

Summary:	Restore maximized full height window result in its previous height
Product:	[Plasma] kwin	Reporter:	Anthony Fieroni <bvbfan>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.22.4
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Open Kate -> resize to full height -> restart app -> maximize -> restore -> half height

Description Anthony Fieroni 2021-08-08 16:29:13 UTC

SUMMARY
I'm not sure it's window system or KWin related issue
X11, single display, 96DPI

STEPS TO REPRODUCE
1. Open for e.g. Kate
2. Make height to be full and restart application
3. Maximize window
4. Restore it
5. Window is half of previous height

OBSERVED RESULT
Window after restore from maximize is half of previous height

EXPECTED RESULT
Window after restore from maximize to equal to previous height

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.22.4
(available in About System)
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.84
Qt Version: 5.15.5 (KDE patches)

ADDITIONAL INFORMATION
Actually this bug is pretty aged. It happens only after first run, if you make it full height again, maximize/restore works correct.

Comment 1 Anthony Fieroni 2021-08-08 16:35:42 UTC

Created attachment 140588 [details]
Open Kate -> resize to full height -> restart app -> maximize -> restore -> half height

Comment 2 Anthony Fieroni 2021-08-08 17:55:16 UTC

After a bit thinking it's not a half height just a previous height (before resize to full height)

Comment 3 Nate Graham 2021-08-09 16:37:07 UTC

I have heard other reports of this, but have never been able to reproduce the issue myself.

Does it affect all KXMLGui-using windows? How about a window from an app that does not use KXMLGui like Discover or Elisa or System Monitor? What about a 3rd-party SSD-using app?

Comment 4 Anthony Fieroni 2021-08-09 16:49:45 UTC

Yup it affects all KXMLGui apps, probably bug is there. See attached video.

Comment 5 Anthony Fieroni 2021-08-09 16:56:17 UTC

Firefox is affected, Steam not.

Comment 6 Anthony Fieroni 2021-08-09 17:03:21 UTC

Discover NOT.

Comment 7 Nate Graham 2021-08-12 16:54:19 UTC

Is Firefox running in CSD mode, or SSD mode?

Comment 8 Anthony Fieroni 2021-08-12 17:31:54 UTC

SSD.

Comment 9 Nate Graham 2021-08-12 18:08:01 UTC

If firefox is affected, that would seem to suggest that KXMLGUI is not to blame, as it certainly does use that framework. Moving to KWin.

Comment 10 David Edmundson 2023-09-06 10:38:27 UTC

This bug was reported against an outdated version of KWin. We have made many changes since the. 
If the issue persists in newer versions can you reopen the bug report updating the version number.