Bug 103896 - [optimus, reverse PRIME] no HDMI audio
Summary: [optimus, reverse PRIME] no HDMI audio
Status: NEW
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: 7.7 (2012.06)
Hardware: Other All
: medium normal
Assignee: Nouveau Project
QA Contact: Xorg Project Team
Depends on:
Reported: 2017-11-24 21:39 UTC by post+fdo
Modified: 2017-11-24 21:39 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


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Description post+fdo 2017-11-24 21:39:55 UTC
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 <https://people.freedesktop.org/~cbrill/dri-log/index.php?channel=nouveau&highlight_names=&date=2017-11-24#t-2034>.  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)

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