https://bugs.kde.org/show_bug.cgi?id=503381
Bug ID: 503381
Summary: Plasma Shell and various QML/Qt Quick parts force RGB
Subpixel Rendering for fonts, regardless of
user-specified Subpixel Rendering setting
Classification: I don't know
Product: kde
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: unassigned-b...@kde.org
Reporter: skygalax...@outlook.com
Target Milestone: ---
Created attachment 180678
--> https://bugs.kde.org/attachment.cgi?id=180678&action=edit
plasma-shell clock with forced RGB anti aliasing, resulting in colour-fringing
SUMMARY
At any UI-scale, except 100%!, various QML-written parts of KDE Plasma (shell,
System Settings, KDE apps & third party Qt Quick apps such as Fedora Media
Writer) exhibit forced RGB subpixel rendering, regardless of user-specified
Subpixel setting.
This is noticable on my BGR monitor as colour-fringing/chromatic abberation.
I've had this issue for at least over a year (Sorry for not creating an issue
earlier!). Reproducible on Fedora KDE, OpenSUSE TW, KDE Neon, Kubuntu. Plasma 5
doesn't have this issue.
STEPS TO REPRODUCE
1. Set UI-scale over 100%
2. Adjust Subpixel Rendering (e.g. Off or BGR) and reboot
OBSERVED RESULT
Observe the fact that RGB subpixel rendering is still applied to plasma-shell,
Discover & System Settings, etc. Causing colour-fringing/chromatic abberation
on Non-RGB monitors, such as BGR or OLED monitors.
EXPECTED RESULT
Qt Quick QML parts & apps also acknowledging the user-specified subpixel font
rendering setting.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora KDE, Kubuntu, KDE Neon, OpenSUSE TW
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.13
Qt Version: 6.9
ADDITIONAL INFORMATION
I use a 4K TV with BGR subpixels at 200%. Plasma Wayland with amdgpu driver (RX
6800)
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