Re: [Alsa-user] mixer problems with intel8x0 (correct module for new nforce2 board?)

[Clemens L. <cl...@la...>]

David Van Duzer wrote:
> I have a fairly new motherboard, an ABIT AN7 with an NForce2 chipset.
>
> The snd-intel8x0 module loads without a problem, but the mixer doesn't
> seem to work properly.  I can get audio only if I turn on the "Line-In
> As Surround" attribute as well as the "Duplicate Front" attribute, and
> plug my speakers into the Line-In jack.  None of the other outputs
> provide audio, even with all the other mixer controls maxed and unmuted.

What codec do you have (see the first line of
/proc/asound/card0/codec97#0/ac97#0-0)?

> lspci tells me this:
>
> 00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 Audio Controler (MCP) (rev a1)
> 00:06.0 Class 0401: 10de:006a (rev a1)

This controller is supported by snd-intel8x0.

> 00:05.0 Multimedia audio controller: nVidia Corporation nForce MultiMedia audio [Via VT82C686B] (rev a2)
> 00:05.0 Class 0401: 10de:006b (rev a2)
>
> This initially led me to believe that the I should be using the
> snd-via82xx module, but that won't load.

This is some undocumented DSP used for AC3 decoding and such stuff.
The "Via" in the description string of this PCI ID is a bug.


HTH
Clemens