For the record, I have run 3.7.0-4 with i915.i915_enable_rc6=0 for more than 24 hours in sum without a single freeze. So I confirm Timo's theory that this is the cause, and he said RC6 is going to be reverted for Arrandale in the next kernel upload.
** Changed in: linux (Ubuntu) Status: Incomplete => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1081009 Title: [arrandale] GPU lockup IPEHR: 0x02000022 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1081009/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs