Comment 20 for bug 206998

I have the same problem with a dell d810 and a radeon card. I can not have compiz with a correct 1280x800 screen, it is splitted like you have showed.
I tried to reset resolution with xrandr but it doesn't make any difference, compiz screen is always splitted. But if I use an externale monitor, attached in dell docking station, everything goes well, on the lcd laptop screen and on the 17'' lcd external monitor.