Sound On ION based systems
(Redirected from Notes On Using Analog Out)
Some people might find the following blog post helpful.
How to enable ALSA Analog 5.1 Sound on Nvidia ION
I recently had the problem to enable 5.1 Sound with 3 click outputs on an Nvidia ION board. By default Linux configures it with only one plug configured as output. After some research I found a solution in the OpenSUSE Wiki you have to set during module loading to get it working. Basically you have to add
options snd-hda-intel model=3stack-6ch enable=1 index=0
to your modeprobe.conf to tell the driver to use all its 3 plugs as output. After you loaded the modules like this, alsamixer will show you all the 6 channels, so you can unmute them.
Source: Pascal's Blog
HDMI
To be able to use audio over HDMI, the following requirements have to be met:
- alsa 1.0.19
- snd-hda-codec-nvhdmi has to be loaded before snd-hda-intel
- Unmute IEC958 mixer
Maybe the following has to be added to /etc/asound.conf
pcm.!default hdmi:NVidia
Source: nV News Forum