https://bugs.kde.org/show_bug.cgi?id=489909
Bug ID: 489909
Summary: Font settings not applied to Qt5 apps
Classification: Plasma
Product: plasmashell
Version: 6.1.2
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: m...@kisaragi-hiu.com
CC: k...@davidedmundson.co.uk
Target Milestone: 1.0
Created attachment 171473
--> https://bugs.kde.org/attachment.cgi?id=171473&action=edit
An example of the problem showing how font settings are applied in Qt6 apps but
not in Qt5 apps
SUMMARY
Font settings are not applied to Qt5 apps. This includes the font family and
the font size.
This happened somewhat recently, at some point after Plasma 6.0.
STEPS TO REPRODUCE
1. Set the system font to something that differs from whatever Qt5 falls back
to, like Noto Sans at 11pt.
2. Open a Qt5 app, like VLC, Lokalize, or Krita
3. Open a Qt6 app like Dolphin as control
OBSERVED RESULT
Font settings are not applied to Qt5 apps, and they fall back to a default font
configuration, which is probably Sans 9pt.
In Qt6 apps it continues to be applied normally.
EXPECTED RESULT
Font settings, including font size, continues to be applied to Qt5 apps.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux (6.6.37-1-lts)
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
(Qt5 Version: 5.15.14+kde+r141)
ADDITIONAL INFORMATION
For every app where this bug affects, this message appears:
QFont::fromString: Invalid description 'Noto
Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
QFont::fromString: Invalid description 'Noto
Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1,regular'
QFont::fromString: Invalid description 'Noto
Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1,regular'
(Substitude "Noto Sans" and "11" for the general font family and size chosen in
the Fonts KCM)
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