Bug 510172

Summary: It would be nice if you could apply Plasma settings to SDDM from the command-line
Product: [Applications] systemsettings Reporter: swagfortress
Component: kcm_sddmAssignee: Plasma Bugs List <plasma-bugs-null>
Status: CONFIRMED ---    
Severity: wishlist CC: kde, kde, nate
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: NixOS   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description swagfortress 2025-10-02 16:35:31 UTC 
SUMMARY
sddm-kcm adds an “Apply Plasma Settings…” button to the KDE System Settings app. Pressing “Apply Plasma Settings…” allows you to synchronize your Plasma settings with SDDM.

I run NixOS, and I want to be able to add something to my NixOS configuration so that it automatically synchronizes my Plasma settings with SDDM without me having to manually go into System Settings and click on the “Apply Plasma Settings…” button. It would be nice if there was a command that I could run in order to synchronize my Plasma settings with SDDM. Then, I could make sure that that command gets run automatically as a part of my NixOS configuration.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS 25.05.20250907.092c565 (Warbler)
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.1

ADDITIONAL INFORMATION
I had posted a question about this on KDE Discuss, but that question hasn’t received any responses yet: <https://discuss.kde.org/t/can-you-apply-plasma-settings-to-sddm-from-the-command-line/36880?u=jayman>