GNOME Display Manager
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This article's factual accuracy may be compromised due to out-of-date information. (September 2012)
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GNOME Display Manager
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| Developer(s) | The GNOME Project (William Jon McCann, Brian Cameron, Ray Strode) |
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| Stable release | 3.26.0 (13 September 2017[1]) [±] |
| Preview release | 3.27.2 (15 November 2017) [±] |
| Written in | C |
| Operating system | Unix-like (includes: BSD, Linux, Solaris) |
| Type | |
| License | GNU General Public License |
| Website | wiki |
GNOME Display Manager (GDM) is a display manager (a graphical login program) 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.
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Software architecture[edit]
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.[2]
Components[edit]
GDM comprises the following components:
- Chooser – a program used to select a remote host for managing a display remotely 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)
Hidden features[edit]
Until version 2.22,[3] 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".[4]
- 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),[5] then log in normally – a dialog box appears after entering the password.
Queen of England[edit]
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This article may be confusing or unclear to readers. (October 2017) (Learn how and when to remove this template message)
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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.[6] Subsequently, developers realised that the title "Queen of England" has not existed since the Acts of Union of 1707.[7]
Removed features[edit]
As of version 3.0 the GNOME display manager switched to using AccountService for saving the user's selected session rather than storing it in the user's home directory, effectively making it unusable in a networked environment.[8]
See also[edit]
- getty – a non-graphical login program
- LightDM
- Simple Desktop Display Manager
References[edit]
- ^ https://www.gnome.org/news/2017/09/gnome-3-26-released/
- ^ "GDM documentation".
- ^ "migrate gui to new config framework with a chainsaw". 2007-06-01. Retrieved 2014-04-26.
- ^ "gdm – guilogin.c". Retrieved 2009-08-26.
- ^ "GDM commit ee8de912". 5 March 2001. Retrieved 2009-08-26.
- ^ "ANNOUNCE: GDM 2.2.1, the 'Just because you're not paranoid doesn't mean they're not after you' release". 4 May 2001.
Gdm2 was originally written by Martin K. Petersen <mkp mkp net>, and is now maintained by the Queen of England.
- ^ "ANNOUNCE: GDM 2.5.90.2 (unstable), the "Nose poking" release". 4 Mar 2004.
- ^ "Bug 617465 - GDM ignores user's default session in ~/.dmrc". 5 Jul 2013.
External links[edit]
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