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    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [SNB][drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck wait on render ring, action: continue"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=98355">98355</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[SNB][drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck wait on render ring, action: continue
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>XOrg git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>mariusz.libera@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>i915 platform</th>
          <td>SNB
          </td>
        </tr>

        <tr>
          <th>i915 features</th>
          <td>GPU hang
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=127422" name="attach_127422" title="cat /sys/class/drm/card0/error | bzip2 > error.bz2">attachment 127422</a> <a href="attachment.cgi?id=127422&action=edit" title="cat /sys/class/drm/card0/error | bzip2 > error.bz2">[details]</a></span>
cat /sys/class/drm/card0/error | bzip2 > error.bz2

After resuming from suspend instead of KDE's lockscreen I was greeted only by
my wallpaper and mouse cursor (responsive). I switched to another tty (it
worked, I could log in) and back and this time it was only black screen, after
another tty switch xserver crashed. After that I was able to start another X
session.

This is what happened this time, but honestly I can't use my laptop for 2 days
without experiencing, at best, freezing of my desktop for a few seconds or, at
worst, forcing me to reboot using sysrq. I can't reliably reproduce it, seems
to happen at random, and may not always be a "GPU Hang", I also saw messages
like:
WARNING: CPU: 0 PID: 500 at drivers/gpu/drm/i915/intel_display.c:3857
intel_atomic_commit+0x1459/0x1460 [i915]
Removing stuck page flip
followed by a backtrace, but was too lazy to report.


Archlinux x86_64
Kernel 4.8.2
Mesa 12.0.3
Xserver 1.18.4</pre>
        </div>
      </p>


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