Sound problem with P7H55 MoBo Intel IbexPeak HDMI aplay versus alsamixer

[Oleg Goldshmidt]

On Thu, Dec 16, 2010 at 11:01 AM, Lev Olshvang <lolshva at 012.net.il> wrote:
>
> Hi,
>
> My system  Asus P7HP55M Pro board +i3 530 processor running Ubuntu 10.04, 10.10
>
> Board had HDMI port to output  video and audio.
> Video is OK,  cabel is ok because it is HDMI 1.4 (suppors audio )
>
> I have issues with sound :
> alsamixer under the kernel 2.6.32.26  shows only line in, mic and SPDIF output
> aplay shows hdmi subdevice

Sanity check: try different mixer (starting with alsamixer) and volume
control applications and see if there are any controls missing from
the GUI (usually somewhere under Preferences) and volume set to 0.

In the past I found that something like gnome-control-volume or
gst-mixer could be used to switch the right channel on, even though I
used KDE. I have no idea why. In my experience the issue was typically
microphone not working for Skype and such.

> I migrated to Ubuntu 10.10 to have a latest alsa version . Now alsamixer thinks it works with Intel IbexPeak HDMI chip, sound from line out gone.

Not only HDMI this time?

> I put a custom kernel (vanilla 2.6.36.2) hoping for the best but
> still no sound.
>
> aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: Intel [HDA Intel], device 0: ALC892 Analog [ALC892 Analog]

Hmm... I have a 2.6.33 kernel lying around on my work laptop, and I
don't see ALC892 in Documentation/sound/alsa/HD-Audio-Models.txt. I
don't know if it is significant, nor do I know whether, say,
ALC882/883/885/888/889 is a good substitute. It probably is, and in
any case I understand that you have sound, just not through HDMI. This
probably means that what follows is not the solution, but if you have
no other ideas you might want to try your options.

Check your /etc/modprobe.d/alsa-base.conf (or whatever the Ubuntu
equivalent is) against "lspci | grep Audio" to see if the model
specified looks right. If you decide to play with the model then you
may try the following:

1) choose the default "auto" model, in this case the kernel relies on
the BIOS, and this means that the sound device should be enabled in
the BIOS - check that.

2) disable the sound card in the BIOS, boot, choose this or that model
that looks relevant from the HD-Audio-Models.txt list, and reload the
module/modules.

Just some random ideas...

--
Oleg Goldshmidt | oleg at goldshmidt.org