[mythtvnz] No HDMI sound output in desktop (Mythtv ok)

[Stephen Worthington]

On Sun, 15 Jun 2014 15:08:38 +1200, you wrote:

>On Sun, 15 Jun 2014 14:56:33 +1200, Stephen Worthington  
><stephen_agent at jsw.gen.nz> wrote:
>
>> On Sun, 15 Jun 2014 13:55:31 +1200, you wrote:
>>
>>> On Thu, 12 Jun 2014 11:52:32 +1200, Paulgir <paulgir at gmail.com> wrote:
>>>
>>>>
>>>>
>>>> Hi all
>>>>
>>>> I have been trying to get HDMI sound back for the Mythbuntu desktop by
>>>> modifying asound.conf.
>>>> It seems,looking at my notes that,
>>>>
>>>> pcm.!default {
>>>> 	type hw
>>>> 	card 1
>>>>            device 9
>>>> }
>>>>
>>>> worked in the past but it does not now.
>>>>
>>>> The command speaker-test -c 2 -D hdmi:CARD=NVidia,DEV=3  Will give me
>>>> sound through the speakers.But speaker-test -c 2   won't and I get
>>>> nothing
>>>> when using a browser or VLC.
>>>> I've tried different numbers for Device= and looked at lots of threads
>>>> but
>>>> I'm not having much luck.One question: do I need to reboot after
>>>> modifying
>>>> asound.conf?
>>>>
>>>> Cheers  Paul
>>>
>>>
>>> Any help?
>>
>> Have you checked to see if there is a mute or low volume control
>> setting in one of the mixers on that channel?  On my laptop, I had to
>> use alsamixer and also a GUI Pulse Audio mixer to make my HDMI audio
>> work.
>>
>Edit:Sorry,typo:
>When I run alsamixer it looks like the volumes for  4 spdif outputs are at  
>00 (not MM)
>But I can't increase them as I can with the other outputs.
>Paul

00 is good.  MM means muted.  There should not be a volume control bar
above SPDIF outputs on a mixer as they do not have volume controls.
But of course they are affected by volume controls in the path to
them.  Especially the pesky Pulse Audio - so now you need to install a
Pulse Audio mixer and check that.  Recent versions of Mythbuntu do
install Pulse Audio, although it is not particularly apparent that
they have done it.  I have heard it is possible to uninstall it, but
all I found I needed to do was use its mixer to unmute things and set
the volume settings to maximum.