Arch is the best: Create page based on the SDDM page but trimmed down somewhat

2026-04-21T01:22:09Z

Create page based on the SDDM page but trimmed down somewhat

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[https://invent.kde.org/plasma/plasma-login-manager Plasma Login Manager (PLM)] is a fork of [[SDDM]] for [[KDE Plasma]]. PLM is only available in NixOS 26.05 or above.

== Installation ==
Plasma Login Manager can be enabled as follows:
{{File|3=services.displayManager.plasma-login-manager.enable = true;|name=/etc/nixos/configuration.nix|lang=nix}}

== Configuration ==

=== Autologin ===
{{File|3=services.displayManager = {
plasma-login-manager = true;
autoLogin.user = "user"; # Replace with the desired user
};|name=/etc/nixos/configuration.nix|lang=nix}}

=== fprint ===
With fprint enabled on the system, PLM will expect a fingerprint after entering any password. PLM does not show any prompt for this and this will time out after some time and PLM will attempt to use your entered password. If you have your fingerprints enrolled, you can press enter and use your fingerprint reader. You may find additional options for fprint as well as information on enrolling fingerprints on the [[Fingerprint scanner]] page.

KDE Wallet cannot be unlocked using fprint.

==== Enable fprint system wide ====
You can enable this behavior by enabling fprint.
{{File|3=services.fprintd.enable = true;|name=/etc/nixos/configuration.nix|lang=nix}}

==== Disable fprint for login ====
Stops PLM from prompting for fingerprint.
{{File|3=security.pam.services.login.fprintAuth = false;|name=/etc/nixos/configuration.nix|lang=nix}}

== Troubleshooting ==

=== PLM hangs after entering password ===
If you have fprint enabled, [[#Disable fprint for login|disable it for PLM]].

[[Category:Display Manager]]

Plasma Login Manager - Revision history

Arch is the best: Create page based on the SDDM page but trimmed down somewhat