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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW Regression]DP unable to light up after unplug/plug while X running"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84083">84083</a>
</td>
</tr>
<tr>
<th>Keywords</th>
<td>bisect_pending
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW Regression]DP unable to light up after unplug/plug while X running
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@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>Created <span class=""><a href="attachment.cgi?id=106537" name="attach_106537" title="dmesg">attachment 106537</a> <a href="attachment.cgi?id=106537&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes.
Good commit on -next-queued: 1cf0ba14740d96fbf6f58a201f000a34b74f4725
Non-working platforms: BDW
==kernel==
--------------------------
origin/drm-intel-nightly:3d788a0e87efd99553d5b00a70ab2a162c2c2283(fails)
drm-intel-nightly: 2014y-09m-18d-14h-51m-54s UTC integration manifest
origin/drm-intel-next-queued:f2a95be39ef661595379c23964710f0d760a2385(fails)
drm/i915/vlv: Remove check for Old Ack during forcewake
origin/drm-intel-fixes: 8c875fca1a8d76665c60fa141c220cee65f44f5e(works)
drm/i915: Add limited color range readout for HDMI/DP ports on g4x/vlv/chv
==Bug detailed description==
-----------------------------
Start X, then unplug/plug DP, the DP monitor unable to light up. It works well
if don't start X.
Hardware Environment:
root@x-bdw09:~# lspci -nnn
00:00.0 Host bridge [0600]: Intel Corporation Broadwell-U Host Bridge -OPI
[8086:1604] (rev 09)
00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U
Integrated Graphics [8086:1616] (rev 09)
00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controller
[8086:160c] (rev 09)
00:14.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB xHCI
Controller [8086:9cb1] (rev 03)
00:16.0 Communication controller [0780]: Intel Corporation Wildcat Point-LP MEI
Controller #1 [8086:9cba] (rev 03)
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection (3)
I218-LM [8086:15a2] (rev 03)
00:1f.0 ISA bridge [0601]: Intel Corporation Wildcat Point-LP LPC Controller
[8086:9cc3] (rev 03)
00:1f.2 SATA controller [0106]: Intel Corporation Wildcat Point-LP SATA
Controller [AHCI Mode] [8086:9c83] (rev 03)
00:1f.3 SMBus [0c05]: Intel Corporation Wildcat Point-LP SMBus Controller
[8086:9ca2] (rev 03)
00:1f.6 Signal processing controller [1180]: Intel Corporation Wildcat Point-LP
Thermal Management Controller [8086:9ca4] (rev 03)
==Reproduce steps==
----------------------------
1. Plug DP monitor
2. xinit &
3. Unplug DP cable then plug it</pre>
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