||This article's factual accuracy may be compromised due to out-of-date information. (September 2012)
GDM (the GNOME Display Manager) is a display manager for the X Window System.
The X Window System by default uses the XDM display manager. However, resolving XDM configuration issues typically involves editing a configuration file. GDM allows users to customize or troubleshoot settings without having to resort to a command line. Users can pick their session type on a per-login basis. GDM 2.38.0 is the last version that features customization with themes; subsequent releases do not support themes.
GDM has a few Easter eggs, in the form of strings to be entered in the username box. These can be found in the source file "gui/guilogin.c", in a function named "evil".
- Dancing login - type "Start Dancing" to start, and "Stop Dancing" to stop. (This requires the standard greeter, rather than the graphical one).
- "Gimme Random Cursor" - can be used repeatedly.
- "Require Quarter" (or "Require Quater", for backward compatibility with a typo in the original), then log in normally - a dialog box appears after entering the password.
Queen of England
Some of the copyright notices of GDM refer to the "Queen of England", who is also named as a maintainer in release announcements since version 2.2.1. It was only later that the developers realised that there has been no "Queen of England" since the Acts of Union of 1707.