<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<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 --- - [HSW ULT bisected] I-G-T testdisplay -a causes screen black"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67526">67526</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW ULT bisected] I-G-T testdisplay -a causes screen black
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>cancan.feng@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=83281" name="attach_83281" title="System boot messages">attachment 83281</a> <a href="attachment.cgi?id=83281&action=edit" title="System boot messages">[details]</a></span>
System boot messages
Environment:
---------------------
Kernel: (drm-intel-next-queued)fae5cbff3e3e4097de2e76178d462b90626c2bdb
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Sun Jul 21 21:37:09 2013 +0200
drm/i915: clean up crtc timings computation
Description:
--------------------
This HSW ULT has eDP and miniHDMI. With eDP and miniHDMI plugged in, I execute
./testdisplay -a.
[root@x-hswu32 tests]# ./testdisplay -a
CRTS(3):[0] 1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48
138780 <--- this is eDP's mode.
CRTS(3):[0] 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48
148500 <--- this is HDMI's mode, both eDP and HDMI screen will turn to black.
In addition, In my bisecting, I found that for some bad commits, when screen
turns to black, system can't be accessed by ssh. But there are some commits can
be accessed. Here I restrict this issue to "black screen" and get the bisect
info:
4906557eb37b7fef84fad4304acef6dedf919880 is the first bad commit
commit 4906557eb37b7fef84fad4304acef6dedf919880
Author: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@gmail.com">rodrigo.vivi@gmail.com</a>>
Date: Thu Jul 11 18:45:05 2013 -0300
drm/i915: Hook PSR functionality
PSR must be enabled after transcoder and port are running.
And it is only available for HSW.
v2: move enable/disable to intel_ddi
v3: The spec suggests PSR should be disabled even before backlight (by
pzanoni)
v4: also disabling and enabling whenever panel is disabled/enabled.
v5: make it last patch to avoid breaking whenever bisecting. So calling for
update and force exit came to this patch along with enable/disable
calls.
v6: Remove unused and unecessary psr_enable/disable calls, as notice by
Paulo.
CC: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>>
Signed-off-by: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@gmail.com">rodrigo.vivi@gmail.com</a>>
[danvet: Drop the psr exit code in the busy ioctl since I didn't merge
that part of the infrastructure yet - it needs more thought.]
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
:040000 040000 df6a542740e60b0ae2ea72ea72caf0e3aed17869
5c326989834a202dd43030eb4b6d69e1eb804ba2
M drivers</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>