nVidia GeoForce4 with external CRT

[Allan Metts <ametts2 mindspring com>]

Hi there,

I have a laptop booting Fedora with a nVideo GeoForce4 440.  The machine 
boots up into X just fine, and everything looks great -- UNTIL I try to 
send video to an external CRT.   Then both the external CRT and the 
laptop's LCD become totally scrambled.

I've tried changing the defined monitor settings to match my CRT model, and 
I've tried booting with the external CRT enabled.  No dice.

Can someone put me on the right trail to get this fixed?

Thanks in advance!

A-----