Ubuntu – How to use XDMCP+GDM and Xnest

10.10gdmxdmcp

I have been trying to enable XDMCP on GDM without much success.
Following some instructions I have edited /etc/gdm/custom.conf and added:

[daemon]
RemoteGreeter=/usr/lib/gdm/gdm-xdmcp-chooser-slave
[xdmcp]
Enable=true

Then restarted gdm and tried to connect both locally and from a remote system with:

Xnest :1 -query localhost
Xnest :1 -query remote_system_hostname

I just get a black screen instead of the GDM window as expected.
I am missing something ?

Best Answer

Wait for this bug to be fixed: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/669670

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