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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=54226#c94">Comment # 94</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=54226">bug 54226</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=54226#c93">comment #93</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=82773" name="attach_82773" title="i915_error_state with new patch">attachment 82773</a> <a href="attachment.cgi?id=82773&action=edit" title="i915_error_state with new patch">[details]</a></span>
> i915_error_state with new patch

> (In reply to <a href="show_bug.cgi?id=54226#c92">comment #92</a>)
> > Created <span class=""><a href="attachment.cgi?id=82768" name="attach_82768" title="New read-after-write patch">attachment 82768</a> <a href="attachment.cgi?id=82768&action=edit" title="New read-after-write patch">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=54226&attachment=82768'>[review]</a> [review] [review]
> > New read-after-write patch
> > 
> > Oops, my mistake, please try again.

> Now loading, but after five minutes test:
> 793485 Jul 21 17:32:56 localhost kernel: [  321.432882] hda-intel
> 0000:00:1b.0: Unstable LPIB (32740 >= 4096); disabling LPIB delay counting
> 793486 Jul 21 17:34:49 localhost kernel: [  434.291085]
> [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
> 793487 Jul 21 17:34:49 localhost kernel: [  434.291088] [drm] capturing
> error event; look for more information in
> /sys/kernel/debug/dri/0/i915_error_state
> 793488 Jul 21 17:34:49 localhost kernel: [  434.307124]
> [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0xbfe2000
> ctx 1) at 0xbfe21dc</span >

That is a blorp (mesa/i965) bug and not the semaphore deadlock.</pre>
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