I think that the power management setting has been turned on for the monitor.
You must edit the /etc/X11/XF86Config file or the /etc/X11/xorg.conf file to remove the Option "DPMS" from the Monitor section.
As an alternative you might wish to increase the settings for monitor suspend etc. in the ServerFlags section.
Last edited by vharishankar; 04-05-2005 at 12:56 PM.