[mythtv-users] HDMI audio: plughw:0, 7 works but hdmi:CARD=NVidia doesn't

[Jean-Yves Avenard]

Hi

On 17 March 2011 22:52, Terjesen Jens Peder
<Jens.Peder.Terjesen at devoteam.com> wrote:
>
> I have sruggeled a bit on getting HDMI audio to work properly on two GT430 in two frontends.
>
> I am using Alsa 1.0.23 and aplay -l reported four HDMI sound devices, 3,7,8 and 9.
>
> In KDE/Phonon if I tested with HDMI only I got no sound. Using either of HDMI 3,7,8 or 9 worked with PCM sound.
>
> In MythTV (0.24-fixes git version as of yesterday) the scan for devices only returned hdmi:CARD=Nvidia and no index 3,7,8 or 9. Selecting this device PCM sound worked, but DD sound from a recording only produced white noise.

mythtv will report the exact same devices as aplay -L would (it's the
same code used to parse audio device).

To show the multiple hdmi device, you must use the 1.0.24 alsa library
; if you are using 1.0.23 they won't show up as I've mentioned
countless of times on this distribution list.


>
> I then remembered that when setting up the first card I read about setting a probe_mask for modprobe, but thought that I hadn't actually used that. After starting the working frontend I found that I indeed had used a probe_mask so that only one of the HDMI devices was visible.
> Adding this to the second frontend got everything working with hdmi:CARD=Nvidia.

this isn't necessary with 1.0.24 ; only with old version of alsa

>
> Stephen Warren of Nvidia has written a very descriptive document about HDMI audio.
> This document was where I found the solution.
> http://www.nvnews.net/vbulletin/showthread.php?t=159346

all obsolete