What's the difference between GDM and LightDM?












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What is the difference between GDM and LightDM? How can one switch between them. I mean if I have selected LightDM during installation process, will I be able switch to GDM?










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    96















    What is the difference between GDM and LightDM? How can one switch between them. I mean if I have selected LightDM during installation process, will I be able switch to GDM?










    share|improve this question



























      96












      96








      96


      25






      What is the difference between GDM and LightDM? How can one switch between them. I mean if I have selected LightDM during installation process, will I be able switch to GDM?










      share|improve this question
















      What is the difference between GDM and LightDM? How can one switch between them. I mean if I have selected LightDM during installation process, will I be able switch to GDM?







      11.04 gdm login-screen lightdm






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      edited Jan 28 '12 at 1:20









      Marc-André Appel

      1,084919




      1,084919










      asked Aug 24 '11 at 21:47









      user7044user7044

      1,78682739




      1,78682739






















          2 Answers
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          89














          Both LightDM and GDM (GNOME Display Manager) are login managers.

          They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.



          Ubuntu is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM



          You can have both of them installed (or add even more, like KDM), but only one will be used at any time.



          The default can be selected by running:



          sudo dpkg-reconfigure gdm (if gdm is already installed)



          More information on LightDM can be found on the Ubuntu wiki.






          share|improve this answer





















          • 29





            they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

            – josinalvo
            Aug 15 '12 at 14:28



















          0















          Lightdm :




          1. Uses X by default, with no way of launching a Wayland session.


          2. Works fine on almost all laptops, but GNOME session loads a bit slower than with GDM.


          3. Uses less RAM than GDM.




          GDM :




          1. Uses Wayland by default.


          2. Sessions (both Wayland and GNOME on X) load faster than with lightdm. (GNOME loads faster from GDM because GDM already loads a bunch of GNOME stuff that LightDM does not.)




          Other differences:



          LightDM offers at least the same functionality as GDM but it has a simpler code base and does not load any GNOME libraries to work.
          LightDM is the default display manager for Ubuntu. But the latter is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM.
          Both LightDM and GDM (GNOME Display Manager) are login managers. They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.
          You can have both of them installed (or add even more, like KDM), but only one will be used at any time.





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            2 Answers
            2






            active

            oldest

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            2 Answers
            2






            active

            oldest

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            active

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            active

            oldest

            votes









            89














            Both LightDM and GDM (GNOME Display Manager) are login managers.

            They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.



            Ubuntu is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM



            You can have both of them installed (or add even more, like KDM), but only one will be used at any time.



            The default can be selected by running:



            sudo dpkg-reconfigure gdm (if gdm is already installed)



            More information on LightDM can be found on the Ubuntu wiki.






            share|improve this answer





















            • 29





              they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

              – josinalvo
              Aug 15 '12 at 14:28
















            89














            Both LightDM and GDM (GNOME Display Manager) are login managers.

            They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.



            Ubuntu is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM



            You can have both of them installed (or add even more, like KDM), but only one will be used at any time.



            The default can be selected by running:



            sudo dpkg-reconfigure gdm (if gdm is already installed)



            More information on LightDM can be found on the Ubuntu wiki.






            share|improve this answer





















            • 29





              they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

              – josinalvo
              Aug 15 '12 at 14:28














            89












            89








            89







            Both LightDM and GDM (GNOME Display Manager) are login managers.

            They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.



            Ubuntu is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM



            You can have both of them installed (or add even more, like KDM), but only one will be used at any time.



            The default can be selected by running:



            sudo dpkg-reconfigure gdm (if gdm is already installed)



            More information on LightDM can be found on the Ubuntu wiki.






            share|improve this answer















            Both LightDM and GDM (GNOME Display Manager) are login managers.

            They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.



            Ubuntu is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM



            You can have both of them installed (or add even more, like KDM), but only one will be used at any time.



            The default can be selected by running:



            sudo dpkg-reconfigure gdm (if gdm is already installed)



            More information on LightDM can be found on the Ubuntu wiki.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Oct 19 '15 at 14:15









            Tim

            19.8k1486141




            19.8k1486141










            answered Aug 25 '11 at 2:15









            Pavlos G.Pavlos G.

            7,33612733




            7,33612733








            • 29





              they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

              – josinalvo
              Aug 15 '12 at 14:28














            • 29





              they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

              – josinalvo
              Aug 15 '12 at 14:28








            29




            29





            they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

            – josinalvo
            Aug 15 '12 at 14:28





            they are not desktop managers: gnome, kde and unity are. GDM and LightDM are called login managers or display managers

            – josinalvo
            Aug 15 '12 at 14:28













            0















            Lightdm :




            1. Uses X by default, with no way of launching a Wayland session.


            2. Works fine on almost all laptops, but GNOME session loads a bit slower than with GDM.


            3. Uses less RAM than GDM.




            GDM :




            1. Uses Wayland by default.


            2. Sessions (both Wayland and GNOME on X) load faster than with lightdm. (GNOME loads faster from GDM because GDM already loads a bunch of GNOME stuff that LightDM does not.)




            Other differences:



            LightDM offers at least the same functionality as GDM but it has a simpler code base and does not load any GNOME libraries to work.
            LightDM is the default display manager for Ubuntu. But the latter is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM.
            Both LightDM and GDM (GNOME Display Manager) are login managers. They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.
            You can have both of them installed (or add even more, like KDM), but only one will be used at any time.





            share




























              0















              Lightdm :




              1. Uses X by default, with no way of launching a Wayland session.


              2. Works fine on almost all laptops, but GNOME session loads a bit slower than with GDM.


              3. Uses less RAM than GDM.




              GDM :




              1. Uses Wayland by default.


              2. Sessions (both Wayland and GNOME on X) load faster than with lightdm. (GNOME loads faster from GDM because GDM already loads a bunch of GNOME stuff that LightDM does not.)




              Other differences:



              LightDM offers at least the same functionality as GDM but it has a simpler code base and does not load any GNOME libraries to work.
              LightDM is the default display manager for Ubuntu. But the latter is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM.
              Both LightDM and GDM (GNOME Display Manager) are login managers. They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.
              You can have both of them installed (or add even more, like KDM), but only one will be used at any time.





              share


























                0












                0








                0








                Lightdm :




                1. Uses X by default, with no way of launching a Wayland session.


                2. Works fine on almost all laptops, but GNOME session loads a bit slower than with GDM.


                3. Uses less RAM than GDM.




                GDM :




                1. Uses Wayland by default.


                2. Sessions (both Wayland and GNOME on X) load faster than with lightdm. (GNOME loads faster from GDM because GDM already loads a bunch of GNOME stuff that LightDM does not.)




                Other differences:



                LightDM offers at least the same functionality as GDM but it has a simpler code base and does not load any GNOME libraries to work.
                LightDM is the default display manager for Ubuntu. But the latter is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM.
                Both LightDM and GDM (GNOME Display Manager) are login managers. They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.
                You can have both of them installed (or add even more, like KDM), but only one will be used at any time.





                share














                Lightdm :




                1. Uses X by default, with no way of launching a Wayland session.


                2. Works fine on almost all laptops, but GNOME session loads a bit slower than with GDM.


                3. Uses less RAM than GDM.




                GDM :




                1. Uses Wayland by default.


                2. Sessions (both Wayland and GNOME on X) load faster than with lightdm. (GNOME loads faster from GDM because GDM already loads a bunch of GNOME stuff that LightDM does not.)




                Other differences:



                LightDM offers at least the same functionality as GDM but it has a simpler code base and does not load any GNOME libraries to work.
                LightDM is the default display manager for Ubuntu. But the latter is supposed to officially replace GDM in favor of the lighter and more easily customizable LightDM.
                Both LightDM and GDM (GNOME Display Manager) are login managers. They both provide graphical login capabilities (the GUI with the list of the system's users) as well as remote logins using the XDMCP protocol.
                You can have both of them installed (or add even more, like KDM), but only one will be used at any time.






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                answered 3 mins ago









                ممدوح محمد العامرىممدوح محمد العامرى

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