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<th>Priority</th>
<td>medium
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW ULT] clonemode of eDP and HDMI causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67609">67609</a>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Summary</th>
<td>[HSW ULT] clonemode of eDP and HDMI causes system hang
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>All
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<th>Reporter</th>
<td>cancan.feng@intel.com
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<th>Hardware</th>
<td>Other
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
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<th>Product</th>
<td>DRI
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<pre>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 issue happens on HSW Harris Beach ULT, this machine has eDP and miniHDMI
display ports. I tested extension mode under X and found that HDMI can clone
eDP but eDP can't clone HDMI. The latter will cause system hang.
Here I attach system boot dmesg and Xorg.0.log.
Reproduce Steps:
--------------------
1. xinit&
2. xrandr --output eDP1 --left-of HDMI1
3. xrandr --output HDMI1 --same-as eDP1 --auto
4. xrandr --output eDP1 --right-of HDMI1
5. xrandr --output eDP1 --same-as HDMI1 --auto ----> system hang</pre>
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