Originally Posted by tj1235
I had a Dell E6400 laptop with a nVidia controller. Is anyone know how to set it up to a dual monitor?
Yes, but you don't say what version/distro of Linux, and what kind of dual-monitor you are looking for. Are you wanting xinerama, twinview, or just two single-screens.
If you go to the nVidia site, you can not only download the Linux drivers for whatever card you're using, but actually look up the instructions on how to do this, for whatever method you want.