I have a fresh install of Ubuntu 10.10 dual-booting on my Thinkpad T60 with Windows 7. It works fine for awhile, but after a period of time (the time always varies), the display begins to distort and flicker. It appears as if the multiple, broken images of the display were flying across the screen from top to bottom. If I switch to a terminal, using Ctrl+Alt+[1-6], I still have the same flickering/flying problem. The system is then unusable, so I am forced to reboot. I never have this issue with Windows 7. My graphics controller is a ATI Technologies Inc Radeon Mobility X1400.