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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW] DP screen is black after resuming from S3/S4 when DP connection is the only connection"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89631">89631</a>
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<th>Summary</th>
<td>[BSW] DP screen is black after resuming from S3/S4 when DP connection is the only connection
</td>
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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>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</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>jeff.zheng@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=114421" name="attach_114421" title="dmesg log">attachment 114421</a> <a href="attachment.cgi?id=114421&action=edit" title="dmesg log">[details]</a></span>
dmesg log
==System Environment==
--------------------------
HDMI monitor: ASUS PA238Q
BIOS: V59
Regression: No. Tried on drm-intel-testing-2015-01-30 and still saw this issue.
This might be related with processor and BIOS upgrade, since I tested before
and didn't find this issue at that time.
Non-working platforms: BSW
==kernel==
--------------------------
-testing: drm-intel-testing-2015-03-13 (fails)
==Bug detailed description==
-----------------------------
When connected ASUS PA238Q monitor with DP cable and un-plug eDP cable to keep
DP to be the only connection, DP screen will be black screen after resuming
from S3/S4.
==Reproduce steps==
----------------------------
1. Connected ASUS PA238Q with DP cable, un-plug eDP cable and boot
2. echo mem > /sys/power/state
3. Resume by pressing power button</pre>
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