G210 HDMI garbled graphics

Hello all. I recently bought a GeForce G210 card for a dedicated media center using XBMC. I have a problem with XBMC (or any linux build cause I tried mandriva and systemrescuecd) where the picture looks almost interlaced. It has distinct lines running through it, also the resolution is detecting wrong because the entire desktop does not fit on screen. I have the video card connected via HDMI. I should also mention the bios and command line look good, and this only occurs running the xserver using the official drivers. I would really appriciate any help! Thank!