[Bug 70740] HiZ on SNB causes GPU hang with WebGL web app

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70740

Kenneth Graunke <kenneth at whitecape.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
           Assignee|idr at freedesktop.org         |kenneth at whitecape.org

--- Comment #1 from Kenneth Graunke <kenneth at whitecape.org> ---
Joe,

I just landed a bunch of Sandybridge GPU hang fixes on Mesa master.

Currently we have two known GPU hangs:
- IPEHR = 0x7905 (3DSTATE_DEPTH_BUFFER)
  => bug #70151 - should be fixed with Mesa master as of today
- IPEHR = 0x0b160001 (MI_SEMAPHORE_MBOX) - 
  => bug #54226 - still unsolved; a kernel issue.

Either /sys/class/drm/card0/error (modern kernels) or
/sys/kernel/debug/dri/0/i915_error_state (older kernels) will tell you which
issue you have.  You can decode it with intel_error_decode from
intel-gpu-tools.  Or just attach it.

The one that I fixed apparently is much more common, and we've had other
reports of Google Maps triggering it.  So most likely, your bug is fixed.

Could you try master?  Thanks!

--Ken

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