Ubuntu
alsa-driver package

  1. Bug #939161
  2. Comment #42

Comment 42 for bug 939161

Revision history for this message
Takashi Iwai (tiwai) wrote : Re: [alsa-devel] [PATCH] ALSA: hda - Remove ignore_misc_bit

At Mon, 17 Sep 2012 09:39:01 +0200,
David Henningsson wrote:
>
> > But the jack detection controls don't follow this yet. Maybe we can
> > set such a jack control as inactive state when the jack detection is
> > disabled.
> >
> > (And this reminds me that we can cut off "Phantom" name hack by
> > following the same rule -- just set the control inactive when it has
> > no real detection. But it still appears in control list.)
>
> Looking at the alsa-lib API, this seems doable. It seems possible to
> figure out using snd_hctl_elem_info and then
> snd_ctl_elem_info_is_inactive. If it is also runtime changeable (i e
> depending on some other mixer control), we need a callback to fire on
> the hctl.

Why are you using snd_hctl? For looking over jack controls, using
snd_ctl_* is more straightforward.

Also, which callback are you thinking of? The phantom jack is
basically just a placeholder, so there should be no activity from
itself.

Takashi