Bug 513347

Summary:	Lines artifacts at 115% fractional scale
Product:	[Plasma] kwin	Reporter:	Oleg <dreamkepeer>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal
Priority:	NOR
Version First Reported In:	6.5.4
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Line artifact appearing at the plasma panel

Description Oleg 2025-12-14 09:06:14 UTC

SUMMARY
With 115% scaling I have graphical artifacts at plasmashell panel and sometimes even under it. There are some other cases of these lines appearing in different applications.

STEPS TO REPRODUCE
1. Change fractional scale to 115% for one monitor
2. Start using system

OBSERVED RESULT
At some point lines will start to appear

EXPECTED RESULT
No lines

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1
Kernel Version: 6.18.1-2-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 9800X3D 8-Core Processor
Memory: 64 ГиБ of RAM (62.4 ГиБ usable)
Graphics Processor: AMD Radeon RX 6700 XT
Manufacturer: ASUS

ADDITIONAL INFORMATION
I have 3 monitors: left 1080p 100% scale, middle 1440p 115% scale (where artifacts appear), right 1080p 100% portrait

Comment 1 Oleg 2025-12-14 09:09:54 UTC

Created attachment 187624 [details]
Line artifact appearing at the plasma panel

Comment 2 Vlad Zahorodnii 2025-12-15 08:04:58 UTC

This looks like a graphics driver bug, please report this issue to AMD developers.