[ubuntu] ubuntu 12.04 completely freezes frequentely

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http://ubuntuforums.org – Hi, sorry for my bad english, I'm Italian :) I've a problem with unity 3D, it freezes frequently and I can't click anything, neither by mouse or by keyboard; however, cursor still moves. I also have this crash using unity 2D, but at least I can ignore the bug and continue to use my pc. Others have the same problem: https://bugs.launchpad.net/ubuntu/+s...el/+bug/993187 Is there already a solution? Thanks for all ):P --> Crash details are in the image below, it seems to affect the package xserver-xorg-video-intel. Attached Images cra (Hardware)