jack-sense where is it?

jack-sense where is it?

[Paulo Silva]

Hi, I'm not sure if this is the right place to post this, so forgive me if
I'm making a mistake.

I'm trying to find where in the source of alsa kernel modules is the part
that enumerates the jacks (outputs) of the sound card.

This is because I have two headphone jacks and since I upgraded to 2.6.26,
when I plug anything to the 2nd headphone the first gets muted.

I think this is a jack sensing related bug, since the 1st jack is enumerated
as "Front" and the 2nd as "Headphone" when in reality they are both
"Headphone" 1 and 2.

If someone can give me a hint to where the code related with the enumeration
of the jack sensing is located, then I could make some tests myself. I just
want to save some work searching for it.

Regards,
paulo

Re: jack-sense where is it?

[Raymond Yau]

2011/1/16 Paulo Silva <paulo.jnkml@gmail.com>

>
> This is because I have two headphone jacks and since I upgraded to 2.6.26,
> when I plug anything to the 2nd headphone the first gets muted.
>
> I think this is a jack sensing related bug, since the 1st jack is
> enumerated
> as "Front" and the 2nd as "Headphone" when in reality they are both
> "Headphone" 1 and 2.
>


if your notebook has dual headphone jacks and internal speakers,
this usually need special handling in hp_automute() function of your hda
codec since it depend on how your hda codec route the audio to dual
headphone jacks and internal speakers

you will need to study datasheet of your hda codec and hda/patch_xxxx.c