XDMCP problems

[Barry Nauta]

Hello,


> Have you remembered to do a /etc/init.d/gdm restart? If you can not
> choose XDMCP as protocol in tsclient, install xnest. I have two
> computers running XDMCP on my local network which I connect to from this
> computer with tsclient.

Yes, display manager restarted, also tried kdm instead of gdm but the
problem remains.

There is a more fundamental problem I guess. From the commandline, as
root; I cannot startup graphical clients:

Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

the DISPLAY variable is set to ':0.0'... 

Any input appreciated,
Barry