Package: nodm Version: 0.13-1.3 Severity: important File: /etc/pam.d/nodm https://bugzilla.gnome.org/show_bug.cgi?id=784992#c2 says It's a distribution bug for the keyring to not be unlocked automatically at startup.
https://wiki.archlinux.org/index.php/Nodm says you should add auth include system-local-login account include system-local-login password include system-local-login session include system-local-login