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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 --- - [BDW Regression]eDP can't be lighted up after Xrandr rotate"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81940">81940</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>[BDW Regression]eDP can't be lighted up after Xrandr rotate
</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>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=103716" name="attach_103716" title="dmesg">attachment 103716</a> <a href="attachment.cgi?id=103716&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes. Good commit:
(-next-queued)d4ef41ce151988411dec8b089636d9ecbd1da559
Non-working platforms: Broadwell
==kernel==
--------------------------
-nightly: c95053d599112ec3b8c27a632e3c1544558891a4 (failed)
drm-intel-nightly: 2014y-07m-30d-22h-36m-53s integration manifest
-queued: 5193109cd669c7990b043a7187548546c16f8af3 (failed)
drm/i915: Align intel_dsi*.c files a bit
-fixes: f4be89cecea437aaddd7700d05c6bdb5678041f7 (works)
drm/i915: Fix crash when failing to parse MIPI VBT
==Bug detailed description==
-----------------------------
start X, and do rotate. eDP panel can't be lighted up.
==Reproduce steps==
----------------------------
1. xinit &
2. xrandr --output eDP1 --rotate left
==Bisect results==
----------------------------
Bisect shows: b6d547791fd3ef4ccc89ad2556ab01045640aef7 is the first bad commit
commit b6d547791fd3ef4ccc89ad2556ab01045640aef7
Author: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@intel.com">rodrigo.vivi@intel.com</a>>
AuthorDate: Fri Jul 11 10:30:19 2014 -0700
Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Wed Jul 23 07:05:21 2014 +0200
drm/i915: Enable PSR by default.
Panel Self Refresh is an eDP power saving feature specified by VESA's eDP
v1.3,
that allows some panel componets to shutdown while you still see static
images on
the screen. Besides being supported on the platform it must be supported by
the
eDP panel itself.
Now that we have the propper frontbuffer tracking support and correct locks
on place
we can enabled this feature by default.</pre>
</div>
</p>
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