Bug 512358 - GTK applications use different from what is configured
Summary: GTK applications use different from what is configured
Status: REPORTED
Alias: None
Product: Breeze
Classification: Plasma
Component: gtk theme (other bugs)
Version First Reported In: 6.5.3
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-11-19 23:13 UTC by elman
Modified: 2025-11-19 23:40 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Different fonts (90.38 KB, image/avif)
2025-11-19 23:40 UTC, elman 		Details
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Description elman 2025-11-19 23:13:30 UTC 
SUMMARY
When I open an GTK app, it uses different font than what is configured in KCM. It seems it's using default GTK font. I think it started with 6.5.2, but I'm not quite sure of that. I have tested it with Firefox (package), Thunderbird (package), SSH Pilot (flatpak).

gsettings correctly reports my changed font:

❯ gsettings get org.gnome.desktop.interface font-name
'Fira Sans Condensed  11'

❯ gsettings get org.gnome.desktop.interface monospace-font-name
'JetBrainsMono Nerd Font  11'


STEPS TO REPRODUCE
1. Open KCM and change general font to something else.
2. Open GKT app

OBSERVED RESULT
Font used in GTK app differs from what is configured in KCM.

EXPECTED RESULT
GTK apps should use the same font.

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS 
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.0
Kernel Version: 6.17.8-zen1-1-zen (64-bit)
Graphics Platform: Wayland

aur/gtk2 2.24.33-5
extra/gtk3 1:3.24.51-1
extra/gtk4 1:4.20.2-3
Comment 1 elman 2025-11-19 23:40:01 UTC 
Created attachment 186967 [details]
Different fonts