ok it's just configuration issue but now im a little bit frustrating. Well i want to work professionnaly with multi screen. But in fact the big display mode of ati's linux driver suck a lot in comparaison of this mode on windows, same for the dual head mode. Well i learn everything on ati's linux driver and my constation is that linux is great, really great, but ati's linux drivers suck, really suck.....
