https://bugs.kde.org/show_bug.cgi?id=511081
Bug ID: 511081
Summary: kde-gtk-config color scheme value is desync with
xdg-desktop-portal-kde
Classification: Applications
Product: systemsettings
Version First 6.4.5
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: kcm_style
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
SUMMARY
When switching from dark to light theme, xdg-desktop-portal-kde emits
SettingChanged with color-scheme set to 2 (prefer light). kde-gtk-config sets
org.gnome.desktop.interface.color-scheme to 0 which makes
xdg-desktop-portal-gtk to emit SettingChanged with color-scheme set to 0 (no
preference). xdg-desktop-portal-gtk emits later thus applications use its
value.
STEPS TO REPRODUCE
1. Switch Plasma to a dark color scheme and back
OBSERVED RESULT
SettingChanged is first emitted with 2, then 0
EXPECTED RESULT
SettingChanged is emitted both times with 2
SOFTWARE/OS VERSIONS
Operating System: NixOS 25.11
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.17.0-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 32 × AMD Ryzen 9 5950X 16-Core Processor
Memory: 64 ГиБ of RAM (62.7 ГиБ usable)
Graphics Processor: AMD Radeon RX 6400
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7C94
System Version: 1.0
ADDITIONAL INFORMATION
I believe xdg-desktop-portal is at fault too due to not checking which impl is
responsible for the setting before forwarding the signal and I made a bug
report for it too (https://github.com/flatpak/xdg-desktop-portal/issues/1842)
but I don't know how fast they will fix it or will they fix it at all thus I
believe it would be a good idea to synchronize the values.
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