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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Calpella]Resume from S4 causes system reboot sporadically"
href="https://bugs.freedesktop.org/show_bug.cgi?id=66951">66951</a>
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[Calpella]Resume from S4 causes system reboot sporadically
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>cancan.feng@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>System Environment:
--------------------------------------------
Description :
Kernel: (drm-intel-next-queued)50b44a449ff1a19712ebc36ffccf9ac0a68033bf
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Wed Jun 5 13:34:33 2013 +0200
drm/i915: clear DPLL reg when disabling i9xx dplls
Bug detail Description:
--------------------------------------------
System can suspend to disk successfully, but will reboot while resuming from S4
sporadically. This happens about 1 in 5 times.
Reproduce step:
--------------------------------------------
1. booting up machine
2. echo disk > /sys/power/state --> system reboot</pre>
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