@jsakusbury: I tested your kernel 3.5.0-27-generic #45~lp1140716v1 (from comment #22), it was no improvement for my system. I got two hangups within the first hour (one S3 cycle at 1985), the second one forced me to turn off the system:
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.5.0-27-generic root=/dev/mapper/System-root ro quiet splash i915.i915_enable_rc6=1 vt.handoff=7 [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.5.0-27-generic root=/dev/mapper/System-root ro quiet splash i915.i915_enable_rc6=1 vt.handoff=7 [ 0.804805] i915 0000:00:02.0: power state changed by ACPI to D0 [ 0.804809] i915 0000:00:02.0: power state changed by ACPI to D0 [ 0.805030] i915 0000:00:02.0: setting latency timer to 64 [ 0.824988] i915 0000:00:02.0: irq 43 for MSI/MSI-X [ 1.563280] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [ 1894.853449] i915 0000:00:02.0: power state changed by ACPI to D3 [ 1896.202702] i915 0000:00:02.0: power state changed by ACPI to D0 [ 1896.202708] i915 0000:00:02.0: power state changed by ACPI to D0 [ 1896.202720] i915 0000:00:02.0: setting latency timer to 64 [ 1984.429241] i915 0000:00:02.0: power state changed by ACPI to D3 [ 1985.767157] i915 0000:00:02.0: power state changed by ACPI to D0 [ 1985.767160] i915 0000:00:02.0: power state changed by ACPI to D0 [ 1985.767168] i915 0000:00:02.0: setting latency timer to 64 [ 2132.278551] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung [ 2132.278555] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state [ 3504.895781] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1140716 Title: [regression] 3.5.0-26-generic GPU hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1140716/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
