Comment 9 for bug 669535

Same issue on my side. Just bought a new laptop: Lenovo G550, installed Ubuntu 10.10 and am facing issue as above: while it is not all the times, it very often (50% of time?) runs into mode where until I move mouse or press a key the computer completely freezes (does completely nothing, e.g. flash animation on the web stops, or screensaver demo). It does things in the background only as long as I am moving the mouse.

Interesting: this laptop model is known for its issues with touchpad. In my case, when I use touchpad, every few minutes touchpad stops working for approx 5 seconds and then it works again.

Visual effects linkage: not sure if any. E.g. I was using "normal" visual effects mode when the system freezing started. When switched to no visual effects in Ubuntu, the freezing continued.