No display on SLES 11

This is a SUSE Linux Enterprise server 11 sp1 server. Recently, found no GUI display on the system. I connected with SSH, and type "rcxdm status", it shows "running". But, when I did a rcxdm stop and start, it would start with the following error:

    WARNING: GdmDisplay: display lasted x seconds

What's went wrong? can help?
BalackAsked:
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expert_tanmayCommented:
You have to be root to execute the command rcxdm start. if xdm does not start even after being root check the messages log tail -f /var/log/messages to check what is going wrong. Also check if / has enough space using df -h. Start yast and see if xfs service is running. If you still get no clues please post the messages when you start xdm.

Cheers..
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BalackAuthor Commented:
use commands - rcxdm stop; killall X; and rcxdm start solved the problem. The GUi display comes back.
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expert_tanmayCommented:
Looks like your rcxdm stop didn't work according to the earlier comment. killall X has done the trick.  
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BalackAuthor Commented:
It works like a charm
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