[mythtv-users] tearing my hair out with audio over hdmi

[Dave Richardson]

 On Wed, 09 Mar 2011 18:48:22 +0000, Matt Harrison 
 <iwasinnamuknow at genestate.com> wrote:
> On 09/03/2011 18:33, tim draper wrote:
>> i had a similar issue; speaker-test and the alsamixer text-base 
>> setup said
>> things should of been working fine. however i would get no sound or 
>> volume
>> level in the X environment. Nvidia 210 here, using HDMI.
>>
>> the fix?
>> do you have /etc/asound.conf present?
>>
>> i found mine was missing, so after a quick nano with the following 
>> inserted
>> into it, things worked fine!
>>
>> pcm.!default {
>>> type plug
>>> slave.pcm {
>>> type hw
>>> card 0
>>> device 7
>>> }
>>> }
>>
>>
>> the card and device values need to be set according to your hardware 
>> and
>> what you used in speaker-test. im using the the 1.0.24 alsa driver 
>> release.
>> Weirdly, i had this working pretty flawlessly last week before 
>> reinstalling
>> mythbuntu. then i encountered these issues. took me ages to find 
>> this info
>> too, i think i just ended up trying anything 'alsa' and 'no sound' 
>> related
>> rather than nvidia/hdmi specific.
>
> Hi Tim,
>
> Thanks for the reply. I have unfortunately tried a ton of different
> things in asound.conf including something very similar to yours 
> above.
> This is what makes it such a frustrating problem, it SHOULD work :P
>
> I've just been testing with the .asoundrc from the XBMC LiveCD (the 
> only
> time the HDMI audio works) but no joy. I think it got me one step
> closer, but there's still a chasm to get across.
>
> I'm not 100% sure that any part of the setup is correct. I'm almost
> certain the modules/kernel are ok. The mixer...well there's so many
> different people out there with different channels, the information 
> is a
> bit confusing.
>
> I've got the usual analog channels, plus the 3 S/PDIFs (the third of
> which I understand to be the HDMI) and I'm really not sure if I've 
> got
> that set up right.
>
> And there's probably still other parts I am overlooking, but it's all
> starting to blur together now :D
>
> Anyway, thanks for your input, I appreciate any ideas at this stage.
>
> Matt
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 On the ubuntu side there was some findings that there was a needed 
 fetch from PPA for linux generic alsa headers, which may or may not 
 pertain to your distro... since you're hard-up for a solution I thought 
 I'd offer it...  got my Acer Revo 3700 working to HDMI audio out...

 See comment#17 after the main article
 http://monespaceperso.org/blog-en/2010/05/02/upgrade-alsa-1-0-23-on-ubuntu-lucid-lynx-10-04/