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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [DP] [HSW] Resume from suspend to disk fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101355">101355</a>
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<th>Summary</th>
<td>[DP] [HSW] Resume from suspend to disk fails
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>victor.jesusx.lopez.carrillo@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=131811" name="attach_131811" title="dmesg log">attachment 131811</a> <a href="attachment.cgi?id=131811&action=edit" title="dmesg log">[details]</a></span>
dmesg log
System Environment
=======
OS: Linux Ubuntu 17.04 64 bits
Kernel: 4.12.0-rc3-drm-tip-ww2-commit-187376e+
X-Org: 1.19.99.1
Regression?
=======
No
Bug detailed description
=======
Haswell fails to return from S4 state with configurations
SST2 HDMI + DP + HDMI - 4k and
SST2 HDMI + DP + HDMI + 4k
What happens is that the display connected via DP + HDMI resumes with no video.
Reproduce Steps
==============
Connect both HDMI and DP + HDMI displays
$sudo su
#echo disk > /sys/power/state
Wait 10 seconds
Turn the DUT back on
Expected Result
=============
Both displays should resume with video signal
Actual Result
===========
One of the displays fail to resume with proper video signal
Analysis & Root Cause
===================
Unknown</pre>
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