https://bugs.kde.org/show_bug.cgi?id=490075
Bug ID: 490075
Summary: One-pixel rendering artifacts in high DPI XWayland
applications with "Apply scaling themselves"
Classification: Plasma
Product: kwin
Version: 6.1.2
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: dantmnf2+kdeb...@gmail.com
Target Milestone: ---
Created attachment 171557
--> https://bugs.kde.org/attachment.cgi?id=171557&action=edit
rendering artifacts in xterm
SUMMARY
When screen scale factor is larger than 100% and X11 scaling option is set to
"Apply scaling themselves", one-pixel rendering artifacts can be observed in
XWayland applications. Mostly noticeable in raw X11 applications that take use
of something like "partial redraw" (e.g. xterm and LibreOffice with
`SAL_USE_VCLPLUGIN=gen`)
STEPS TO REPRODUCE
1. Set screen scale factor to 200% and X11 scaling option to "Apply scaling
themselves"
2. Open xterm
3. Move mouse around menu items in xterm
OBSERVED RESULT
One-pixel lines on the edge of redraw areas.
EXPECTED RESULT
No rendering artifacts.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
ADDITIONAL INFORMATION
OpenGL ES profile renderer: AMD Radeon Graphics (radeonsi, rembrandt, LLVM
18.1.8, DRM 3.57, 6.9.8-arch1-1)
OpenGL ES profile version: OpenGL ES 3.2 Mesa 24.1.3-arch1.1
Also reproducible in earlier versions.
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