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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW-U Regression]System hang while running "xrandr --output eDP1 --off""
href="https://bugs.freedesktop.org/show_bug.cgi?id=81488">81488</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-U Regression]System hang while running "xrandr --output eDP1 --off"
</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>
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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>==System Environment==
--------------------------
Regression: Yes
Good commit on -next-queued: 91565c85b66db820f01894a971d39aaef60c4325
Bad commit on -next-queued: d101c8fe9bda6578ae72d6021415cfaad2b422f0
Non-working platforms: BDW-U
==kernel==
--------------------------
origin/drm-intel-nightly: e61f0f00aae3bde8be33766c1b19219ef3a2c708(fails)
drm-intel-nightly: 2014y-07m-17d-14h-33m-56s integration manifest
origin/drm-intel-next-queued: 7c908fe2cad0c11c509ad9d01e8dce3fa86af85a(fails)
drm/i915: extract and improve gen8_irq_power_well_post_enable
origin/drm-intel-fixes: c6930992948adf0f8fc1f6ff1da51c5002a2cf95(works)
Revert "drm/i915: reverse dp link param selection, prefer fast over wide
again"
==Bug detailed description==
System hang while running "xrandr --output eDP1 --off". unable to catch dmesg
because system hang.
Only one BDW-U device able to reproduce this bug, the other BDW-U and BDW
devices are worked.
==Reproduce steps==
----------------------------
1. xinit &
2. xrandr --output eDP1 --off</pre>
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