https://bugs.kde.org/show_bug.cgi?id=515482
Bug ID: 515482
Summary: SDDM KCM "Apply Plasma Settings" fails to sync active
theme overrides stored in ~/.config/kdedefaults/
Classification: Applications
Product: systemsettings
Version First 6.4.5
Reported In:
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: kcm_sddm
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: ---
SUMMARY
In Plasma 6, when a Global Theme is applied, specific overrides (such as
ColorScheme or WidgetStyle) are frequently stored in
~/.config/kdedefaults/kdeglobals rather than the base ~/.config/kdeglobals.
When using the "Apply Plasma Settings" button in the Login Screen (SDDM)
settings module, the utility only syncs the base kdeglobals file to
/var/lib/sddm/.config/. Because it ignores the kdedefaults overlay, the SDDM
greeter falls back to system defaults (e.g., Breeze) instead of the user's
actual active theme.
STEPS TO REPRODUCE
1. Apply a Global Theme that utilizes kdedefaults for its color scheme (e.g.,
Utterly-Nord).
2. Verify that ~/.config/kdeglobals contains ColorScheme=Breeze while
~/.config/kdedefaults/kdeglobals contains the actual active scheme (e.g.
ColorScheme=UtterlyNord)
3. Go to System Settings > Login Screen (SDDM) and click "Apply Plasma
Settings"
4. Logout or check /var/lib/sddm/.config/kdeglobals
OBSERVED RESULT
The synced kdeglobals in the SDDM directory contains the "base" Breeze setting.
The greeter appears with incorrect colors/styles.
EXPECTED RESULT
The Sync utility should perform a KConfig merge of the user's active
configuration (including the kdedefaults layer) before writing the result to
the SDDM configuration directory.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 25.10
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
ADDITIONAL INFORMATION
Workaround: Manually merging the contents of ~/.config/kdedefaults/kdeglobals
into /var/lib/sddm/.config/ kdeglobals resolves the issue.
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