Comment 70 for bug 348332

I have a dell e1705 i have a radeon mobility x1400 video card.
i have random lockups and freezes, where only the mouse works. also the black screen with no mouse, for the most part i have been able to restart with the alt+SysRq REIUB.
and not sure if it's related but when i try to run x-plane it start's up runs, then just disappears completely, and i'm back at the desktop. if there is any info i can provide that will help please let me know.