Mythbuntu 12.04 - audio in myth fine - no desktop audio

[DeweyOxberger]

I'm posting this for my future self (to help me remember what to do). Maybe it will help someone else:

Installed Mythbuntu 12.04 on a system with NVidia GT240 or there abouts.

Myth now has a cool audio setup that worked slick but it talks straight to the alsa device you select. I forgot to set a system default device. Tried to play a movie in the browser. Ack! Kids cheezed. No audio. Panic time. How does alsa work again?

aplay -L

Shows all the possible devices.

I know I had picked one that worked in myth. Popped in and saw it was something about CARD=NVIDIA_1, DEV=1.

The aplay -L list had this entry:

hdmi:CARD=NVidia_1,DEV=1
    HDA NVidia, HDMI 0
    HDMI Audio Output

That must be it. So did:

speaker-test -c 2 -D hdmi:CARD=NVidia_1,DEV=1

Since my Samsung TV is 2 channel audio (YMMV) and got the nice audio test noise. It worked. So:

cd /etc
sudo nano asound.conf

Then made typed this:

pcm.!default {
type plug
slave.pcm "hdmi:CARD=NVidia_1,DEV=1"
}

Saved the file. I can't figure out how to restart the sound subsystem. Seems to not matter. Cool.

Did a speaker test with the default device:

speaker-test -c 2

It worked.

Desktop audio restored. Party on.

Future Dewey, dang your brain is turning to mush. Hopefully this will help you.

Present Dewey

[Kantalias]

This process has typically worked for me as well but I had to deal with a new hitch when I upgraded to 12.04. There is a great generalized guide linked here: http://ubuntuforums.org/showthread.php?t=1885240. Not that what you've shared is wrong or lacking, just that (as the guide reveals) there are a variety of potential pitfalls with audio configuration and other folks may have different problems.

[DeweyOxberger]

Great link. Thanks!

You are right. What I posted is not comprehensive. I posted it as a future note to myself on this hardware.