So not rc6 related - that rules out the most likely suspect for the GPU. Let the machine run memtest overnight or over the weekend, just to rule a bad stick of memory. Then if you have VTd enabled, intel_iommu=off will be useful to test, and perhaps pcie_aspm=off.
** Summary changed: - System freeze after high memory usage (Ubuntu 12.10 64-bit on ivy bridge HD4000) + [ivb] System freeze after high memory usage -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1137817 Title: [ivb] System freeze after high memory usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1137817/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
