I recently partitioned my hard drive and I am running Ubuntu on my HP DV6 3050us. I manually installed the catalyst legacy 12.6 driver, and it seems to be working. However, I cannot get my monitor to work as a second screen. It stays black, does not show any picture. Linux is not recognizing it at all. I've tried going into setting and checked in a lot of forums but I can't seem to fix this.

Is it possible the monitor itself needs a driver?
I'm using a dvi to hdmi cable, could that be an issue?