[mythtv-users] No HDMI audio

[Allen Edwards]

On Tue, Jun 23, 2009 at 2:24 AM, Jim Stichnoth <stichnot at gmail.com> wrote:

> Sorry for yet another digital audio thread.
>
> I can't get any audio whatsoever to go through my HDMI connection.
> Here are some details of my setup:
>  - Gigabyte GA-E7AUM-DS2H motherboard
>  - MythDora 10.21 (kernel 2.6.27.9-159.fc10.i686)
>  - alsa 1.0.20
>  - nvidia driver 180.51
>  - Vizio TV model VW32L
>
> The alsa version is a little weird.  "yum list alsa\*" shows version
> 1.0.20-1.fc10 of alsa-lib.i386, alsa-lib-devel.i386, and
> alsa-utils.i386, yet "cat /proc/asound/version" gives 1.0.18a.
>
> I even went so far as to disable onboard audio in the BIOS setup,
> leaving HDMI audio enabled.  Here are the results of aplay:
>
> $ aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> $ aplay -L
> hdmi:CARD=NVidia
>    HDA NVidia, NVIDIA HDMI
>    HDMI Audio Output
> null
>    Discard all samples (playback) or generate zero samples (capture)
>
> Alsamixer shows just one control, IEC958, and I have unmuted it.
>
> No audio with Myth.  No audio with something like "mplayer -ao
> alsa:device=hdmi -afm hwac3 1071_20090620215900.mpg".  No audio with
> "speaker-test -D hdmi -c 2".  I tried following Allen's tips in
> http://www.mythtv.org/wiki?title=AllensDigitalAudioHowto (but at 2:00
> in the morning I'm not sure I tried every combination).  Pulseaudio
> appears not to be installed except for pulseaudio-libs.
>
> Interestingly, if I ctrl-alt-F2 to switch into a console window, aplay
> says there are no devices.  I wonder why is that?
>
> Any suggestions on how to proceed?  Does anyone have positive
> experience with HDMI audio on this motherboard, the Gigabyte
> GA-E7AUM-DS2H?
>
> Jim



A simple test is to set alsa up with

  pcm.!default {
     type plug
     slave.pcm "hdmi"
  }


and put a CD in and issue this command

mplayer -cache 500 -cdrom-device /dev/cdrom cdda://


Also, don't ignore settings in your TV.  It would be great if you had
another hdmi device to use to test the TV.

 Allen
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