Configuring and using Xdmcp with gdm3 on ubuntu 18.04












3















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














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    3















    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














    bumped to the homepage by Community 14 mins ago


    This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.


















      3












      3








      3


      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

      1613




      1613





      bumped to the homepage by Community 14 mins ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







      bumped to the homepage by Community 14 mins ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
























          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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          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


















          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

          42646




          42646













          • 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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