I think this lockup bug was likely due to the older mesa that was present in ia32-libs.
Version 20090808ubuntu11 was just recently added to natty a day ago; it's possible at the time your system locked up that you had the older version of ia32-libs with the broken mesa. Have you had any system lockups since you upgraded to this version of ia32-libs? If not, then please see if you can reproduce the lockup again with this ia32-libs, and give it a few days to recur. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/745308 Title: [arrandale] GPU lockup (ESR: 0x00000001 IPEHR: 0x05000000) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs