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<base href="https://bugs.freedesktop.org/" />
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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 --- - [HSW mobile]eDP can't light up when boot up, BIOS can display well"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65995">65995</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW mobile]eDP can't light up when boot up, BIOS can display well
</td>
</tr>
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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>major
</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>yangweix.shui@intel.com
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=81148" name="attach_81148" title="dmesg: eDP can't light up when machine booting up">attachment 81148</a> <a href="attachment.cgi?id=81148&action=edit" title="dmesg: eDP can't light up when machine booting up">[details]</a></span>
dmesg: eDP can't light up when machine booting up
Environment:
---------------------
HW info:
Acer Haswell Notebook Aspire V3 772G 17.3 ;
Host bridge ID=0x0c04 (rev 06);
VGA ID=0x0416 (rev06);
CPU: i7-4702MQ 2.2GHz;
BIOS:v1.04 MEM: 4G ;
Kernel: (drm-intel-nightly)19b2dbde5732170a03bd82cc8bd442cf88d856f7
Some additional commit info:
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Jun 12 10:15:12 2013 +0100
drm/i915: Restore fences after resume and GPU resets
Description:
---------------------
I have tried many kernels, when machine boot up, eDP can display well in BIOS,
but failed to display after system finished initialized. If I removed i915, eDP
can display again.
The followed phenomenon:
1. eDP failed to display if boot to level 3.
2. eDP light up again by start X(but it need to connect another display pipe).</pre>
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