Today I decided to throw away my Windows XP configuration and give a try for Ubuntu Edgy Eft on my PC at home. 

First of all, installation is a breeze. I choose the x64 since I have an AMD 3500+ CPU. I've used the live CD and everything seemed to work.

Except my dual screen config. I only had an image on my left screen. After some searching I've found you needed to configure your xorg.conf in /etc/X11.

I have got a nVidia GeForce 6600 GT and two LCD screens. After doing A LOT of attempts, I got it to work. But for some reason without graphics acceleration (XGL). Then I've found this site. It describes the differences GREAT! So I have a nVidia, so why not go for 'TwinView'...

Basicly what I did was adding:

    Option "TwinView" "True"
    Option "TwinViewOrientation" "RightOf"   
    Option "UseEdidFreqs" "True"
    Option "MetaModes" "1280x1024,1280x1024; 1024x768,1024x768"
    Option "UseDisplayDevice" "CRT,CRT"

in the "Device" section, nothing more nothing less. IT WORKS GREAT!