[Bug 966399] [NEW] Mesa related GPU hangs on Sandybridge and Ivybridge systems

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Timo Aaltonen (tjaalton):

During QA testing of 11.10 on unreleased Ivybridge systems, we have
encountered quite a few GPU hang bugs in mesa that take out the desktop
that have been fixed in the stable mesa-7.11 branch after 11.10
released. Given that 7.11.2 is quite large and different than 7.11.0
that is in oneiric, I've backported just the fixes for the issues we
have found and they are all included in 12.04.

These include:

GPU reset loop leading to a hard hang of the system when these apps are run on Ivybridge: qgears2, openarena, unigine heaven, trine, minecraft
Hard hang of the system when these apps are run on Sandybridge: trine, oilrush
Wrong colors rendered in lightsmark on Ivybridge

[Development Fix]
Upstream commits fixing these issues that are included in the patch stack and are also in 12.04's mesa:
http://cgit.freedesktop.org/mesa/mesa/commit/?h=7.11&id=439628318bfd4596d0d8129a0792d2c3ea849bb7

http://cgit.freedesktop.org/mesa/mesa/commit/?h=7.11&id=38dfedccb2a2b695a600350a75113e8c35683498

http://cgit.freedesktop.org/mesa/mesa/commit/?id=c25e5300cba7628b58df93ead14ebc3cc32f338c

http://cgit.freedesktop.org/mesa/mesa/commit/?id=172bb92db1a3c317867d9cfec6f15c09c37a0f6c

[Stable Fix]
Manually backporting those 4 commits

[Test Case]
1. log in to desktop on an Ivybridge system
2. install phoronix-test-suite (sudo apt-get install phoronix-test-suite)
3. run lightsmark or qgears2 test (phoronix-test suite run lightsmark)

If it fails, dmesg will be flooded with these errors and the desktop
will be unusable

Jan 26 12:44:41 u kernel: [ 4260.408090] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jan 26 12:44:41 u kernel: [ 4260.408104] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
Jan 26 12:44:41 u kernel: [ 4260.414015] [drm:i915_wait_request] *ERROR* i915_wait_request returns -11 (awaiting 1332092 at 1332083, next 1332093)
Jan 26 12:44:47 u kernel: [ 4266.772122] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jan 26 12:48:11 u kernel: [ 4470.536612] qgears[27719]: segfault at 0 ip 01d36611 sp bfd950c0 error 4 in i965_dri.so[1cc2000+bc000]

GPU: 00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge
Graphics Controller (rev 08)

** Affects: mesa (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: mesa (Ubuntu Oneiric)
     Importance: High
     Assignee: Robert Hooker (sarvatt)
         Status: In Progress

** Affects: mesa (Ubuntu Precise)
     Importance: Undecided
         Status: Fix Released


** Tags: blocks-hwcert-enablement oneiric patch
-- 
Mesa related GPU hangs on Sandybridge and Ivybridge systems
https://bugs.launchpad.net/bugs/966399
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