|Developer(s)||The GNOME Project (William Jon McCann, Brian Cameron, Ray Strode)|
41.0 / 21 September 2021
41.alpha / 28 July 2021
|Operating system||Unix and Unix-like (Linux, BSD, Solaris)|
|Type||Login manager for Wayland, X display manager|
GNOME Display Manager (GDM) is a display manager (a graphical login manager) for the windowing systems X11 and Wayland.
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 is a display manager that implements all significant features required for managing attached and remote displays. GDM was written from scratch and does not contain any XDM or X Consortium code.
GDM comprises the following components:
Until version 2.22, GDM had 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".
Some of the copyright notices of GDM refer to the "Queen of England", whom release announcements from version 2.2.1 also named as a maintainer. Subsequently, developers realised that the title "Queen of England" has not existed since the Acts of Union of 1707.
Gdm2 was originally written by Martin K. Petersen <mkp mkp net>, and is now maintained by the Queen of England.