Re: dual screen problem with GTX280M
Thank you for your answer. I am using the WHQL drivers, not something beta. So I did more tests today, searching for a hardware problem and I found it: it was actually the DVI cable I was using that has a bad contact. The cable is brand new, so it was the last thing I checked...
There are still troubles with the resolution when I use a VGA cable with VGA/DVI adaptor to plug a non-DVI screen, but I guess the adapator is preventing the proper detection of the resolution.