Comment 11 for bug 347848

Exactly the same issue for me, when a freeze occurs, the mouse still works very slowly.
With keyboard, alt+Syst+B is working and the system reboot, but alt+Syst+K is failing and let the system freeze totally, with some 'visual noise' on the screen.

The system seems to be freezing really often with applications that are dealing with network/internet.

I upgraded the file system to Ext4 when upgraded Intrepid to Jaunty.

Hope that will help a little to solve this major issue.