I have a problem with graphics on my aspire 5516. I use default drivers for lan(atheros) and video(ati radion 1200) cards. So, graphics freezes when my lan adapter is turn on but the cable isn't connected in Ubuntu 11.04-12.04 with UIs Unity 3D and GNOME(no problem in GNOME classic and Unity 2D). Also mouse doesn't move too and I can't restart compiz from keyboard. I can go to text mode and then turn off adapter and restart compiz.
Could someone help me with that? Each answer is appreciated. PS. I'm sorry about my poor English.