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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Apple miniDP-to-VGA adapter doesn't work anymore since Kernel 4.1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91451">91451</a>
</td>
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<tr>
<th>Summary</th>
<td>Apple miniDP-to-VGA adapter doesn't work anymore since Kernel 4.1
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>AlwaysCarryABible@googlemail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=117341" name="attach_117341" title="dmesg woutput">attachment 117341</a> <a href="attachment.cgi?id=117341&action=edit" title="dmesg woutput">[details]</a></span>
dmesg woutput
Since Kernel 4.1 the Apple miniDP-to-VGA adapter stopped working. If I revert
the following commit the dongle works again:
1d002fa720738bcd0bddb9178e9ea0773288e1dd is the first bad commit
commit 1d002fa720738bcd0bddb9178e9ea0773288e1dd
Author: Simon Farnsworth <<a href="mailto:simon.farnsworth@onelan.co.uk">simon.farnsworth@onelan.co.uk</a>>
Date: Tue Feb 10 18:38:08 2015 +0000
drm/dp: Use large transactions for I2C over AUX
I was able to reproduce this bug with the nightly build:
Linux note 4.2.0-1-drm-intel-nightly #1 SMP PREEMPT Fri Jul 24 13:19:36 CEST
2015 x86_64 GNU/Linux
Apparently there are more user affected by this bug:
<a href="https://bbs.archlinux.org/viewtopic.php?id=199540">https://bbs.archlinux.org/viewtopic.php?id=199540</a>
miniDP-to-DVI/HDMI still seems to be working (but I can't test that)</pre>
</div>
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