According to the changelog, this is fixed upstream in kernel 3.2-rc6: Revert "drm/i915: fix infinite recursion on unbind due to ilk vt-d w/a"
This reverts commit eb1711bb94991e93669c5a1b5f84f11be2d51ea1. It blows up the i915 seqno tracking, resulting in the BUG_ON(seqno == 0); in i915_wait_request() triggering, which will cause lock-ups. See for example https://bugs.launchpad.net/ubuntu/+source/linux/+bug/903010 https://lkml.org/lkml/2011/12/14/395 Reported-requested-and-tested-by: Dirk Hohndel Reported-by: Richard Eames Reported-by: Rocko Requin Acked-by: Daniel Vetter Cc: Dave Airlie Cc: Chris Wilson Cc: Keith Packard Cc: Eric Anholt Signed-off-by: Linus Torvalds -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/903010 Title: Kernel BUG at i915_gem.c:1952 causing lock up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/903010/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
