And the last patch landed in drm-intel-next-queued:

commit 0f91128d88bbb8b0a8e7bb93df2c40680871d45a
Author: Chris Wilson <ch...@chris-wilson.co.uk>
Date:   Tue Apr 17 10:05:38 2012 +0100

    drm/i915: Wait for all pending operations to the fb before disabling the pip
    
    During modeset we have to disable the pipe to reconfigure its timings
    and maybe its size. Userspace may have queued up command buffers that
    depend upon the pipe running in a certain configuration and so the
    commands may become confused across the modeset. At the moment, we use a
    less than satisfactory kick-scanline-waits should the GPU hang during
    the modeset. It should be more reliable to wait for the pending
    operations to complete first, even though we still have a window for
    userspace to submit a broken command buffer during the modeset.
    
    Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
    Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>

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https://bugs.launchpad.net/bugs/982251

Title:
  [gm45] False GPU lockup  render.IPEHR: 0x01820000

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