Dell Latitude C600 double screen

I have a problem with my screen, I have a Dell Latitude C600 PIII 1Ghz, 256 RAM, 80GB HD, I have openSUSE 11.2 installed and the first time I runt it I see a double screen with 2 mouses it seems like it is a problem of the monitor or graffics chipset, when Im going to change the resolution I only see 600x400 and 800x600 and I would like to choose 1024x768 but I see that I can read “monitor unknow”, Do I need some drivers I don’t have?? please help me! thank you.