Bug 499256

Summary:	Resize issues when a placement policy/rules sets a non-maximisable window to maximised
Product:	[Plasma] kwin	Reporter:	Alberto Salvia Novella <es20490446e>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	CONFIRMED ---
Severity:	normal	CC:	es20490446e, john.kizer, kde, nate, nicolas.fella
Priority:	LO	Keywords:	wayland-only
Version First Reported In:	6.2.5
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Screenshot stderr.txt Record.mkv

Description Alberto Salvia Novella 2025-01-28 21:44:37 UTC

SYSTEM
- Zenned (Arch Linux customized)
- plasma-desktop 6.2.5-1
- qt6-base 6.8.1-1
- mate-calc 1.28.0-2 (https://archlinux.org/packages/extra/x86_64/mate-calc/)

STEPS
1. Log into plasma using the Wayland session.
2. Launch mate-calc.

RESULT
- mate-calc is unusable.
- The window lacks decorations. No borders and such.
- If you move the window around, the animation is very choppy.

Comment 1 Nicolas Fella 2025-01-28 22:29:40 UTC

Created attachment 177780 [details]
Screenshot

Seems fine here

Comment 2 Alberto Salvia Novella 2025-01-28 22:31:54 UTC

System?

Comment 3 Vlad Zahorodnii 2025-01-29 13:44:12 UTC

Can you run mate-calc with WAYLAND_DEBUG=1 environment variable and post the output here? Please reset the bug report status back to REPORTED after providing the requested information.

Comment 4 Alberto Salvia Novella 2025-01-29 17:16:10 UTC

Created attachment 177793 [details]
stderr.txt

Comment 5 Vlad Zahorodnii 2025-01-29 17:22:07 UTC

Okay, mate calc appears to create a decoration. Can you share a screenshot to give a glimpse of how mate-calc is broken?

Comment 6 Alberto Salvia Novella 2025-01-29 22:29:08 UTC

Created attachment 177802 [details]
Record.mkv

Comment 7 Vlad Zahorodnii 2025-01-30 10:41:51 UTC

Hmm I cannot reproduce the issue. If you move the window by using Meta+LMB, is there any difference?

Comment 8 John Kizer 2025-02-05 20:12:47 UTC

Updating status pending a response to Vlad's last comment

Comment 9 Alberto Salvia Novella 2025-02-06 01:11:07 UTC

No difference.

Comment 10 Alberto Salvia Novella 2025-12-16 11:21:57 UTC

This affects any window that is non-resizable.

I see the same problem with displaycal dialogs.

Comment 11 Alberto Salvia Novella 2025-12-16 11:22:51 UTC

Let me bisect this...

Comment 12 Alberto Salvia Novella 2025-12-16 11:45:23 UTC

I have found the culprit.

On (System Settings -> Window Behavior -> Advanced) set "Window placement" as "Maximized".