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<base href="https://bugs.freedesktop.org/" />
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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 --- - [HD-4400]upsteam kernel (drm-intel-nightly/2014-04-17-trusty) causes blank screen on lenovo X1 Carbon 2014."
href="https://bugs.freedesktop.org/show_bug.cgi?id=77660">77660</a>
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<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>
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<tr>
<th>Summary</th>
<td>[HD-4400]upsteam kernel (drm-intel-nightly/2014-04-17-trusty) causes blank screen on lenovo X1 Carbon 2014.
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>anewgene+freedesktop@gmail.com
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>XOrg CVS
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=97580" name="attach_97580" title="Xorg.0.log">attachment 97580</a> <a href="attachment.cgi?id=97580&action=edit" title="Xorg.0.log">[details]</a></span>
Xorg.0.log
Bug description:
This is related to this bug I reported here:
<a href="https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1307623">https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1307623</a>
I tried the upstream kernel from drm-intel-nightly (2014-04-17-trusty) in
order to investigate the bug above. It actually solved the external monitor
resolution issue, however I had another even more critical issue: my laptop
display turns blank completely. It remains blank even when I boot it without
any external monitor.
System environment:
-- chipset: intel i7-4600U (HD-4400)
-- system architecture: 64-bit
-- kernel: from upstream mainline kernel at
<a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2014-04-17-trusty/">http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2014-04-17-trusty/</a>
-- Linux distribution: Ubuntu 14.04
-- xserver: 1.15.1
-- xserver-xorg-video-intel: 2:2.99.910-0ubuntu1
-- Machine or mobo model: Lenovo X1 Carbon 2014 (20A7CTO1WW)
-- Display connector: DisplayPort
Reproducing steps:
* install upstream kernel from
<a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2014-04-17-trusty/">http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2014-04-17-trusty/</a>
* boot with this kernel</pre>
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