https://bugs.kde.org/show_bug.cgi?id=486039
Bug ID: 486039
Summary: [wayland] Some Applications Render Fonts with
Artifacting at Certain Window/Element Widths at
Fractional Scale Factors
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: eamonn...@protonmail.com
Target Milestone: ---
Created attachment 168847
--> https://bugs.kde.org/attachment.cgi?id=168847&action=edit
Discover Font Rendering
SUMMARY
Some text is rendered with unusual artifacting at certain window sizes when
using fractional scaling. The width/position of the containing element is also
likely to play a role.
When resizing the window, the text will jump around a little bit to the sides
as it goes between being artifacted and rendering correctly. However, if you
resize the window and get one part of the application to look correct, other
parts will not look correct, causing a constant game of cat-and-mouse. I have
not yet found a window size that renders correctly.
On a display without fractional scaling, text renders correctly.
This affects the following software:
- Discover
- NeoChat (resizing doesn't always help in the case of the "About KDE" section,
where the text is always rendered with artifacts).
- Kasts (probably the least impacted except for one case that I will attach a
screenshot of)
- Application Dashboard
- Info Center, to a minimal degree
These issues are usually most visible on the "About" page.
I filed this under "I don't know" because this only affects some (QML?)
applications. Some applications, like Dolphin, are entirely unaffected.
STEPS TO REPRODUCE
For this example, I will use Discover.
1. Open Discover and go to the About page, with a scale factor of 150%
2. If not observe the issue, resize slowly until observed.
3. Text will jump around to the sides by a few pixels while resizing.
OBSERVED RESULT
Some applications will render fonts ugly at 150% scaling.
EXPECTED RESULT
All applications render fonts cleanly regardless of scale factor.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.8.7 Linux Zen
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION
On my system I am using the "Inter Display" font set to Medium 10pt, but this
also affects Noto.
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