Bug 484319

Summary:	VLC (Qt5) window resizing not working
Product:	[Plasma] kwin	Reporter:	Guo Yunhe <i>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	6.0.2
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Guo Yunhe 2024-03-23 12:59:46 UTC

SUMMARY
VLC (Qt5) window resizing not working sometimes. This is only observed in Qt5 apps like VLC, in KDE 6. Qt6 apps seem fine. VLC also works fine in other desktop/wm, like IceWM.

STEPS TO REPRODUCE
1. Open VLC (Qt5)
2. Resize the window quickly (as shown in the attached video)

OBSERVED RESULT
At some point, VLC window stop following your mouse cursor and stop resizing

EXPECTED RESULT
VLC window should always follow mouse cursor and resize as you control it

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20240321
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.8.1-1-default (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5600X 6-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7C94
System Version: 1.0

ADDITIONAL INFORMATION
VLC(Qt5) window resize works in other desktop/wm, like IceWM.

Comment 1 Guo Yunhe 2024-03-23 13:04:06 UTC

Screen recording of mine on openSUSE Tumbleweed: https://youtu.be/pluJ0EEBmX8

Comment 2 Guo Yunhe 2024-03-23 14:07:16 UTC

Another screen record from an Arch Linux user https://www.youtube.com/shorts/dM9k4RbjQz0