I experienced the same problem on an i3-2100 with 3.2.0-39. No detailed info available as I'm not near the machine. Running the 3.2.0-38 kernel made the bug go away.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1159255 Title: GPU freeze possibly caused by transparency effects? sandybridge-m-gt2 GPU lockup IPEHR: 0x41e80000 IPEHR: 0x0b140001 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1159255/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs