When is an account displayed on the Unity login screen? What are the exact rules for an account to be offered for login on the Unity login screen? I figured out: * Locked accounts are still displayed * Without password are still displayed * Marked as /bin/nologin are still displayed However, the majority of the locked accounts like root, several service accounts etc are not displayed.

It depends on the user ID.

Only accounts with an ID >= 500 are displayed on the login and 'Accounts' screens.

You can change this minimum ID value by changing `minimum-uid` in `/etc/lightdm/users.conf` to your preference.

<