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    <body><span class="vcard"><a class="email" href="mailto:imre.deak@gmail.com" title="Imre Deak <imre.deak@gmail.com>"> <span class="fn">Imre Deak</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO --- - Graphical bug and crash [drm] stuck on render ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=76956">bug 76956</a>
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             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>NEEDINFO
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           <td style="text-align:right;">CC</td>
           <td>
                
           </td>
           <td>chris@chris-wilson.co.uk, ville.syrjala@linux.intel.com
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            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO --- - Graphical bug and crash [drm] stuck on render ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=76956#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO --- - Graphical bug and crash [drm] stuck on render ring"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=76956">bug 76956</a>
              from <span class="vcard"><a class="email" href="mailto:imre.deak@gmail.com" title="Imre Deak <imre.deak@gmail.com>"> <span class="fn">Imre Deak</span></a>
</span></b>
        <pre>Could you provide /sys/class/drm/card0/error ?

As this looks like an IVB machines chances are that it's the same as <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [IVB] RCS flip hang"
   href="show_bug.cgi?id=76808">Bug 76808</a>.
As Chris suggested there the following commit could improve the situation:

commit f66fab8e1cd6b3127ba4c5c0d11539fbe1de1e36
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date:   Tue Feb 11 19:52:06 2014 +0200

    drm/i915: Prevent MI_DISPLAY_FLIP straddling two cachelines on IVB

This is already in the -nightly kernel, so could you get a copy and give it a
try?: git://anongit.freedesktop.org/drm-intel drm-intel-nightly branch.</pre>
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