GNOME Display Manager
| GNOME Display Manager | |
|---|---|
| File:GNOME Display Manager in GNOME 47, RHEL 10.png GNOME Display Manager 47 (its default appearance uses a dark theme) | |
| Developers | The GNOME Project (William Jon McCann, Brian Cameron, Ray Strode) |
| Repository |
|
| Written in | C |
| Engine | |
| Operating system | Unix and Unix-like (Linux, BSD, Solaris) |
| Type | Login manager for Wayland, X display manager |
| License | GPL-2.0-or-later |
GNOME Display Manager (GDM) is a graphical login manager ("display 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.
Software architecture
[edit | edit source]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.[1]
Components
[edit | edit source]GDM comprises the following components:
- Chooser – a program used to select a remote host as the source for a remote display on the attached display (gdm-host-chooser)
- Greeter – the graphical login window (provided by GNOME Shell)
- Pluggable authentication module (PAM)
- X Display Manager Control Protocol (XDMCP) (Disabled by default)
Hidden features
[edit | edit source]Until version 2.22,[2] 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".[3]
- Dancing login – type "Start Dancing" to start, and "Stop Dancing" to stop.
- (This requires the standard greeter ("GTK+ Greeter"), rather than the graphical one ("Themed Greeter")).
- "Gimme Random Cursor" – can be used repeatedly.
- This changes the mouse cursor to a randomly selected 1 of 77 different "cursor fonts" as defined in the X11 specification.
- "Require Quarter" (or "Require Quater", for backward compatibility with a typo in the original),[4] then log in normally – a dialog box that reads "Please insert 25 cents to log in." appears after entering the password. Clicking "OK" allows the login process to proceed as normal.
Queen of England
[edit | edit source]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.[5] Subsequently, developers realised that the title "Queen of England" has not existed since the Acts of Union of 1707.[6]
See also
[edit | edit source]Lua error in mw.title.lua at line 392: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal').
- getty – a non-graphical login program
- LightDM
- SDDM (KDE Plasma 5 and KDE Plasma 6)
- KDE Display Manager (KDE Plasma 4)
References
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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External links
[edit | edit source]
- Lua error in Module:Official_website at line 94: attempt to index field 'wikibase' (a nil value).
