Bug 479217

Summary:	With Wobbly Windows effect enabled, moving Windows on a monitor in vertical orientation results in windows flickering and missing sections
Product:	[Plasma] kwin	Reporter:	Matt <m.mcnutt>
Component:	effects-various	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	nate, oded
Priority:	NOR	Keywords:	qt6, regression
Version First Reported In:	5.91.0
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:	https://invent.kde.org/plasma/kwin/-/merge_requests/4817	Version Fixed/Implemented In:
Sentry Crash Report:

Description Matt 2023-12-31 11:16:06 UTC

SUMMARY
Moving Windows on a  monitor in vertical orientation results in window flickering, missing sections. Only happens when the window is being moved, when the mouse button is released the window is rendered correctly. Moving onto a horizontal monitor the window is fine. Re-orienting the monitor to horizontal, the issue disappears

STEPS TO REPRODUCE
1. Move window to or on a vertical monitor
2. note flicking and missing parts of the window
3. release mouse button, window is rendered correctly

OBSERVED RESULT
Flicking window when it is being moved

EXPECTED RESULT
Not flickering window

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Fedora Kinoite Rawhide
(available in About System)
KDE Plasma Version: 5.91.0
KDE Frameworks Version: 5.247.0
Qt Version: 6.6.1

ADDITIONAL INFORMATION

Comment 1 Matt 2023-12-31 11:20:02 UTC

https://mattmcnutt.net/s/xzLkT4EBf2PXgCN

Here is a screencast of the issue

Comment 2 Matt 2023-12-31 11:31:52 UTC

Apparently it is an issue in the wobbly window desktop effect. Disabling wobbly windows and the issue stops. Still only happens on a vertical orientation monitor

Comment 3 Nate Graham 2024-01-11 19:55:19 UTC

What GPU are you using?

Comment 4 Matt 2024-01-12 03:33:21 UTC

(In reply to Nate Graham from comment #3)
> What GPU are you using?

both my test machines are amdgpu - a desktop 5700XT and a Framework with a 7040 series mobile APU

Comment 5 Vlad Zahorodnii 2024-01-12 10:34:25 UTC

Should be fixed.

Comment 6 Vlad Zahorodnii 2024-01-12 10:42:09 UTC

*** Bug 479358 has been marked as a duplicate of this bug. ***

Comment 7 Oded Arbel 2024-01-12 11:11:13 UTC

(In reply to Vlad Zahorodnii from comment #5)
> Should be fixed.

What is the version/commit where this is fixed? I can still reproduce in kwin-wayland's Neon build git20240109.1028 ( 58a2a3cf8141f02f53cac241724227f5e53c2367 ). There are no further updates currently in Neon builds due to a cmake configuration issue in kcm_auroraedecoration.

Comment 8 Vlad Zahorodnii 2024-01-12 13:32:06 UTC

*** Bug 479358 has been marked as a duplicate of this bug. ***