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      <base href="https://bugs.freedesktop.org/">
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    <body><span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Random screen lockups"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99089">bug 99089</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">QA Contact</td>
           <td>xorg-team@lists.x.org
           </td>
           <td>
                
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Product</td>
           <td>xorg
           </td>
           <td>DRI
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Component</td>
           <td>Driver/Radeon
           </td>
           <td>DRM/Radeon
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Assignee</td>
           <td>xorg-driver-ati@lists.x.org
           </td>
           <td>dri-devel@lists.freedesktop.org
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Version</td>
           <td>7.7 (2012.06)
           </td>
           <td>unspecified
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Random screen lockups"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99089#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Random screen lockups"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99089">bug 99089</a>
              from <span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span></b>
        <pre>(In reply to Witold Baryluk from <a href="show_bug.cgi?id=99089#c0">comment #0</a>)
<span class="quote">> 
> It started few weeks ago, and I am getting sporadic screen lookups.</span >

Did the kernel get upgraded to a newer version around that time?


<span class="quote">> $ dmesg
> [37571.611965] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update
> failure on pipe A (start=163606 end=163607) time 560 us, min 1192, max 1199,
> scanline start 1172, end 1213</span >

Are there any other error messages in dmesg after this? Maybe attach the whole
dmesg output.

It looks like maybe a DRM (driver) error path doesn't unlock
dev->mode_config.mutex, so any code trying to lock that hangs.</pre>
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