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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>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BSW Regression]System fails to find eDP monitor."
href="https://bugs.freedesktop.org/show_bug.cgi?id=84265">84265</a>
</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>[BSW Regression]System fails to find eDP monitor.
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>blocker
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>lei.a.liu@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=106765" name="attach_106765" title="dmesg">attachment 106765</a> <a href="attachment.cgi?id=106765&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes. Good commit:
9bbfd20abe5025adbb0ac75160bd2e41158a9e83(drm-intel-fixes).
drm/i915: don't try DP_LINK_BW_5_4 on HSW ULX
Non-working platforms: BSW
==kernel==
--------------------------
-nightly: c920de3c631831526889a384b21da169b16b5c45 (fails)
drm-intel-nightly: 2014y-09m-22d-12h-46m-45s UTC integration manifest
-queued: b680c37a4d145cf4d8f2b24e46b1163e5ceb1d35 (fails)
drm/i915: DocBook integration for frontbuffer tracking
-fixes: 0f33be009b89d2268e94194dc4fd01a7851b6d51 (fails)
Linux 3.17-rc6
==Bug detailed description==
-----------------------------
Boot machine up, eDP is black with backlight. eDP monitor fails to be detected
by I-G-T testdisplay, neither do xrandr. We find this issue on one machine, but
another machine works well.
meesg shows:
root@x-bsw02:~# /GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests/testdisplay -i
Connectors:
id encoder status type size (mm) modes
22 0 disconnected HDMI-A 0x0 0
27 0 disconnected DP 0x0 0
29 0 disconnected HDMI-A 0x0 0
31 0 disconnected DP 0x0 0
CRTCs:
id fb pos size
8 0 (0,0) (0x0)
0 0 0 0 0 0 0 0 0 0x0 0x0 0
13 0 (0,0) (0x0)
0 0 0 0 0 0 0 0 0 0x0 0x0 0
18 0 (0,0) (0x0)
0 0 0 0 0 0 0 0 0 0x0 0x0 0
==Reproduce steps==
----------------------------
1. Boot machine up.
2. Check eDP monitor
==Bisect results==
----------------------------</pre>
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