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LightDM in Ubuntu 12.04 with its default Unity Greeter front-end
Original author(s) Robert Ancell
  • Robert Ancell
  • David Edmundson
Initial release September 10, 2010; 8 years ago (2010-09-10)
Stable release 1.14.0 / March 24, 2015; 3 years ago (2015-03-24)[1]
Development status Active
Written in C
Operating system Linux
Platform GTK+, Qt
Size MB
Available in >50 languages[2][3][4]
License GNU GPL 3[5]

LightDM is an X display manager that aims to be lightweight, fast, extensible and multi-desktop.[6] It uses various front-ends to draw login interfaces,[7] so-called Greeters.[8]


Features include:

  • codebase with few external dependencies
  • standards-compliance (PAM, logind, etc)
  • well-defined interface between the server and user interface
  • cross-desktop (greeters can be written in any toolkit)
  • well-defined greeter API allowing multiple GUIs
  • support for all display-manager use-cases, with plugins where appropriate

LightDM has a simpler code base than GDM and does not load any GNOME libraries to work, but at the cost of some features, that the user may or may not need.[9][10] LightDM is the default display manager for Ubuntu, Edubuntu, Xubuntu and Mythbuntu since 11.10 release,[11][12] for Lubuntu since 12.04 release,[13] and for Kubuntu beginning with 12.10[14] until 15.04.[15]

Available greeters

LightDM Greeters in active development
Name Key feature(s) Version Website
GTK+ Greeter Reference implementation in GTK+,[16] Lubuntu default,[13] Xubuntu default[12] 2.0[16]
Pantheon Greeter Greeter for Elementary OS[17] 2.0[18]
Unity Greeter Ubuntu default[7] 15.04.3[19]
Dormant LightDM Greeters
Name Key feature(s) Version Website
Crowd Greeter Demonstration for an OpenGL-based Greeter[20][21] 0.0.2[22]
GTK+ Builder Greeter An alternative implementation from LXDE for GTK+ based on GtkBuilder featuring WYSIWYG theme editing with Glade Interface Designer. 0.2.0[23]
KDE Greeter Plasma integration,[24][25] Kubuntu default[14] until superseded by SDDM[15][26]
LXQt Greeter Qt-only Greeter for LXQt desktop (formerly Razor Greeter[27]) until superseded by SDDM [28] 0.7
Qt Greeter Reference implementation in Qt
WebKit Greeter Easy theming[7] 2.0.0[29]

See also


  1. Light Display Manager,<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. "Translations: Light Display Manager". 2011-05-13. Retrieved 2013-05-29.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  3. "Translations: LightDM GTK+ Greeter". 2013-05-08. Retrieved 2013-05-29.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  4. "Translations: Unity Greeter". 2012-01-24. Retrieved 2013-05-29.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  5. LightDM: Contents of COPYING,, retrieved 2012-08-23<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. The Light Display Manager (LightDM), retrieved 17 May 2011<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  7. 7.0 7.1 7.2 Ubuntu 11.10 To Switch From GDM To LightDM, 12 May 2011, retrieved 18 May 2011<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  8. Fischer, Matt (2012-02-07). "» So You Want to Write a LightDM Greeter… Matt Fischer's Blog". Retrieved 2013-05-29.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  9. Ubuntu adopts LightDM, login screens to get more exciting,, 12 May 2011, retrieved 18 May 2011<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  10. LightDM, or: an examination of a misunderstanding of the problem, 12 May 2011, retrieved 14 July 2015<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  11. Ubuntu 11.10 ReleaseNotes, Canonical, retrieved 28 May 2012<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  12. 12.0 12.1 Xubuntu 11.10 Release Notes, Canonical, retrieved 17 December 2012<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  13. 13.0 13.1 Lubuntu 12.04 ReleaseNotes, Canonical, retrieved 14 Jun 2012<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  14. 14.0 14.1 RFC] Merging LightDM into KDE Workspaces,, retrieved 2013-05-29<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  15. 15.0 15.1 Swapnil Bhartiya. "Kubuntu 15.04 With Plasma 5.3 - A Totally Different Kubuntu -". - The source for Linux Information.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  16. 16.0 16.1 LightDM GTK+ Greeter in Launchpad,, retrieved 2012-12-16<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  17. Hello, Luna Beta 1 | elementary,, 2012-11-14, retrieved 2013-05-29<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  18. "Greeter in Launchpad".<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  19. Unity Greeter,, retrieved 2012-12-16<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  20. ~lightdm-team/crowd-greeter/trunk (2011-07-27), ~lightdm-team/crowd-greeter/trunk : contents of NEWS at revision 33,, retrieved 2013-05-29<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  21. LightDM Crowd Greeter, YouTube, 2011-09-07, retrieved 2013-05-29<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  22. Crowd Greeter : "LightDM Development Team" team,, 2011-09-08, retrieved 2013-05-29<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  23. Status of LXDE Components, LXDE Team, retrieved 17 December 2012<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  24. David Edmundson (2012-07-21), LightDM-KDE 0.2.0,, retrieved 2012-08-23<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  25. Rationales,, retrieved 2013-05-29<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  26. LightDM-KDE File Archive, KDE, retrieved 6 June 2013<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  27. Razor-qt, razorqt-lightdm-greeter,, retrieved 2012-08-23<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  28. Leclanche, Jerome (2013-10-30). "[Lxde-list] CALL FOR TESTERS: LXQt now available for testing". SourceForge. Retrieved 2016-05-08. ... For a display manager, SDDM is recommended ...<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  29. LightDM Webkit Greeter,, retrieved 2016-01-12<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>

External links