Двойственный Монитор Problem with Radeon HD 7570

I am having двойственный монитор troubles. I have в монитор connected to my onboard Intel graphics card and в монитор connected to my Radeon HD 7570 graphics card. At the moment I have it set-up so that I am using the fglrx proprietary graphics драйвер. This вызови only the монитор connected to my Radeon graphics card to display while the other монитор does not display anything (even though I хан see both конечный VGA devices in the).

For some reason when I try to change the device драйвер to the AMD/ATI xserver-xorg-video-ati драйвер and reboot I get the message "The system is running in low-graphics mode". From there I cannot access Unity at all until I revert the видео settings back to when I previously was working.

I хан get the onboard монитор to work when I have в "manually installed драйвер" but then the other монитор не longer works. Anybody have any advice?