Restarting gdm on same ":0"

[H S Rai <hsrai@gndec.ac.in>]

Due to network failure sometime, the user lost exported 
desktop.

At the moment to give then desktop, I restart gdm. It solve 
the problem of remote user, but at server, it say X is 
running alraedy on :0, and with user's consent it open on :1 
How I can force it to open it on :0

Is there any better way than what I do, to restart X 
service.

--
H.S.Rai