Configuring and using Xdmcp with gdm3 on ubuntu 18.04












4















On a fresh minimal ubuntu 18.04 installation, I tried to activate and use the gdm3 xdmcp server.



Here are steps I followed:




  • Installation


I used the normal installation.



"Download updates during installation" was checked



"Install 3rd parties for Gfx/Wifi/.." was not checked.




  • Xdmcp server


1 . Edit /etc/hosts.allow to set (cf. Gnome doc.).



ALL: ALL #Wide opened to be sure the problem isn't here



2 . Edit /etc/gdm3/custom.conf to set:



[security]
DisallowTCP=false
[xdmcp]
Enable=true



3 . Restart gdm



sudo /etc/init.d/gdm3 restart




  • Xdmcp client


sudo apt install xnest
Xnest -query localhost -geometry 1024x768 :1



Unfortunately, I only have a black screen with regular white flash.



Where did I do something wrong ?



Thanks for your help.



Christophe C.










share|improve this question



























    4















    On a fresh minimal ubuntu 18.04 installation, I tried to activate and use the gdm3 xdmcp server.



    Here are steps I followed:




    • Installation


    I used the normal installation.



    "Download updates during installation" was checked



    "Install 3rd parties for Gfx/Wifi/.." was not checked.




    • Xdmcp server


    1 . Edit /etc/hosts.allow to set (cf. Gnome doc.).



    ALL: ALL #Wide opened to be sure the problem isn't here



    2 . Edit /etc/gdm3/custom.conf to set:



    [security]
    DisallowTCP=false
    [xdmcp]
    Enable=true



    3 . Restart gdm



    sudo /etc/init.d/gdm3 restart




    • Xdmcp client


    sudo apt install xnest
    Xnest -query localhost -geometry 1024x768 :1



    Unfortunately, I only have a black screen with regular white flash.



    Where did I do something wrong ?



    Thanks for your help.



    Christophe C.










    share|improve this question

























      4












      4








      4


      1






      On a fresh minimal ubuntu 18.04 installation, I tried to activate and use the gdm3 xdmcp server.



      Here are steps I followed:




      • Installation


      I used the normal installation.



      "Download updates during installation" was checked



      "Install 3rd parties for Gfx/Wifi/.." was not checked.




      • Xdmcp server


      1 . Edit /etc/hosts.allow to set (cf. Gnome doc.).



      ALL: ALL #Wide opened to be sure the problem isn't here



      2 . Edit /etc/gdm3/custom.conf to set:



      [security]
      DisallowTCP=false
      [xdmcp]
      Enable=true



      3 . Restart gdm



      sudo /etc/init.d/gdm3 restart




      • Xdmcp client


      sudo apt install xnest
      Xnest -query localhost -geometry 1024x768 :1



      Unfortunately, I only have a black screen with regular white flash.



      Where did I do something wrong ?



      Thanks for your help.



      Christophe C.










      share|improve this question














      On a fresh minimal ubuntu 18.04 installation, I tried to activate and use the gdm3 xdmcp server.



      Here are steps I followed:




      • Installation


      I used the normal installation.



      "Download updates during installation" was checked



      "Install 3rd parties for Gfx/Wifi/.." was not checked.




      • Xdmcp server


      1 . Edit /etc/hosts.allow to set (cf. Gnome doc.).



      ALL: ALL #Wide opened to be sure the problem isn't here



      2 . Edit /etc/gdm3/custom.conf to set:



      [security]
      DisallowTCP=false
      [xdmcp]
      Enable=true



      3 . Restart gdm



      sudo /etc/init.d/gdm3 restart




      • Xdmcp client


      sudo apt install xnest
      Xnest -query localhost -geometry 1024x768 :1



      Unfortunately, I only have a black screen with regular white flash.



      Where did I do something wrong ?



      Thanks for your help.



      Christophe C.







      18.04 gdm xdmcp






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked May 9 '18 at 13:48









      user827848user827848

      2113




      2113






















          1 Answer
          1






          active

          oldest

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          0














          In case soemone else finds this question and has problems getting XDMCP to work with gdm3, I managed to get it working by setting gdm3 to use xorg instead of wayland.



          /etc/gdm3/custom.conf



          [daemon]
          # Uncoment the line below to force the login screen to use Xorg
          WaylandEnable=false





          share|improve this answer
























          • Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

            – user827848
            Sep 24 '18 at 19:05













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          1 Answer
          1






          active

          oldest

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          active

          oldest

          votes






          active

          oldest

          votes









          0














          In case soemone else finds this question and has problems getting XDMCP to work with gdm3, I managed to get it working by setting gdm3 to use xorg instead of wayland.



          /etc/gdm3/custom.conf



          [daemon]
          # Uncoment the line below to force the login screen to use Xorg
          WaylandEnable=false





          share|improve this answer
























          • Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

            – user827848
            Sep 24 '18 at 19:05


















          0














          In case soemone else finds this question and has problems getting XDMCP to work with gdm3, I managed to get it working by setting gdm3 to use xorg instead of wayland.



          /etc/gdm3/custom.conf



          [daemon]
          # Uncoment the line below to force the login screen to use Xorg
          WaylandEnable=false





          share|improve this answer
























          • Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

            – user827848
            Sep 24 '18 at 19:05
















          0












          0








          0







          In case soemone else finds this question and has problems getting XDMCP to work with gdm3, I managed to get it working by setting gdm3 to use xorg instead of wayland.



          /etc/gdm3/custom.conf



          [daemon]
          # Uncoment the line below to force the login screen to use Xorg
          WaylandEnable=false





          share|improve this answer













          In case soemone else finds this question and has problems getting XDMCP to work with gdm3, I managed to get it working by setting gdm3 to use xorg instead of wayland.



          /etc/gdm3/custom.conf



          [daemon]
          # Uncoment the line below to force the login screen to use Xorg
          WaylandEnable=false






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Sep 7 '18 at 0:58









          PathinPathin

          43646




          43646













          • Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

            – user827848
            Sep 24 '18 at 19:05





















          • Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

            – user827848
            Sep 24 '18 at 19:05



















          Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

          – user827848
          Sep 24 '18 at 19:05







          Hello Pathin, Thanks a lot for those information. I didn't yet have the time to test it but I will comment when it will be done.

          – user827848
          Sep 24 '18 at 19:05




















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