I am trying to use a Samsung lcd TV s my monitor.

I can boot up OK , to user login then as soon as I log in all I get is "Input not supported" on a blank screen

If I have got this far has X started Ok / and therefore I can assume the problem is not related to xorg.conf?

If that is correct what changes at login to mess up the monitor settings?

Video is an Intel 845 chip , onboard a MicrStar neon mboard.
This is a fresh/clean install of Suse 11.0 with KDE 3.5

Booting up Suse into failsafe works a treat, no errors , good resolution etc. Attempting to change any settings in monitor and display causes "Input not supported" and I have to reboot.