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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [optimus, reverse PRIME] no HDMI audio"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103896">103896</a>
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<th>Summary</th>
<td>[optimus, reverse PRIME] no HDMI audio
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>7.7 (2012.06)
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Driver/nouveau
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>post+fdo@ralfj.de
</td>
</tr>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<p>
<div>
<pre>I have a Lenovo P50 which contains an NVIDIA Quadro M2000M in reverse PRIME
configuration: The HDMI port is connected to the NVidia card. While getting an
image onto the HDMI port works just fine, there is no audio.
I asked about this on IRC, the logs are at
<<a href="https://people.freedesktop.org/~cbrill/dri-log/index.php?channel=nouveau&highlight_names=&date=2017-11-24#t-2034">https://people.freedesktop.org/~cbrill/dri-log/index.php?channel=nouveau&highlight_names=&date=2017-11-24#t-2034</a>>.
The summary is that I tried running the following script (after stopping X):
rmmod nouveau
setpci -s 01:00.0 0x488.l=0x2000000:0x2000000
echo 1 > /sys/bus/pci/devices/0000:01:00.0/remove
#echo 1 > /sys/bus/pci/devices/0000:00:01.0/rescan
echo 1 > /sys/bus/pci/rescan
modprobe nouveau
But that did not help. I then started X again, and lspci still shows only
$ sudo lspci -nn -d 10de:
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM107GLM [Quadro
M2000M] [10de:13b0] (rev a2)</pre>
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