I've go really big problem with vgaswitcheroo and Xorg on my laptop (acer timeline X 5820GT). When I turn off graphic card (by echoing OFF to vgaswitcheroo) everything is fine, but when I change tty to X's computer freezes. What can be the cause of this behavior? And sometimes when I switch it console says that atombios is stucked. What is going on?