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angelcervera
Asked: 2019-06-07 00:11:19 +0800 CST

Enabling sound over HDMI / DP

  • 772

My sound over displayport was not working and looks like it is a known problem with Nvidia graphics cards.

Here the alsa report where I can see that only the HDA Intel module is loaded.

To fix it, this worked to me: https://github.com/hhfeuer/nvhda

git clone [email protected]:hhfeuer/nvhda.git
cd nvhda
make
sudo make install
sudo modprobe nvhda
sudo tee /proc/acpi/nvhda <<<ON

After executing it, I went to Settings -> Sound -> Output Device and select the new HDMI / DisplayPort option.

Here the alsa report after load the module where I can read a new NVidia soundcard.

It is working, so I load the kernel module automatically

sudo echo 'nvhda' >> /etc/modules

Problem and questions:

  • Every time that I restart the laptop, I need to execute sudo tee /proc/acpi/nvhda <<<ON again to enable the sound. How to do it automatically after loading the nvhda module?
  • Is really strange that Ubuntu does not fix this problem. Am I missing something? There is another way?

System Info:

  • MSI GS30 2M Shadow
  • VGA
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Crystal Well 
Integrated Graphics Controller (rev 08)
01:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 
1060 6GB] (rev a1)
  • OS
$ lsb_release -a
No LSB modules are available.
Distributor ID:   Ubuntu
Description:  Ubuntu 19.04
Release:  19.04
Codename: disco

Regards.

sound nvidia hdmi alsa displayport

1 Answers

  1. Best Answer

    Every time that I restart the laptop, I need to execute sudo tee /proc/acpi/nvhda <<

    /proc is a VIRTUAL filesystem that gets recreated on every boot. Generally I would expect there to be a configuration file where you can set this. If you need to do it like this add a line to

    /etc/rc.local

    before the exit 0 and it will get executed on every boot. Not ideal but if it works you only need to wait for a fix to arrive.

    Is really strange that Ubuntu does not fix this problem. Am I missing something? There is another way?

    That really depends on the cause of the problem and how difficult it is. This is a kernel related problem so the Ubuntu team is probably waiting for a fix to arrive. There is a discussion on bug.freedesktop.org and it reads as being pretty difficult. This topic on nvidia puts a relation to nvidia-drm and systemd. If it is a bug in the DRM part that would make it out of reach of the kernel maintainers and it would be nVidia that probably needs to fix it.

    All in all. I trust the Ubuntu team enough to fix what they can and expect this problem to be out of their reach.

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