Proper configuration for dual-headed nVidia 7800GT

[Kevin Oberman]

I have been unable to get both heads of my nVidia 7800GT to work. I
start with the output of 'Xorg --configure' and add the second Monitor
and a display set for a 2560x1024 display. I get the proper display on
one monitor and the other just displays "Cannot Display This Video
Mode".

I add "Option Dualhead" and get no screens found. I added "Option
FlatPanel" and got "Cannot Display This Video Mode" on BOTH screens.

Can anyone give me a clue as to how to configure this for Xrandr
operation? I'm sure I am missing something obvious.

I should mention that the displays are LED panels, but they use VGA, not
DVI connectors, so I have DVI to VGA adaptors on both ports. I can
supply logs of the various configurations.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
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