[alsa-devel] [PATCH 2/5] ALSA: hda - More generic auto-mic switching for Realtek codecs

[Takashi Iwai]

At Sun, 2 Dec 2012 09:55:56 +0800,
Raymond Yau wrote:
> 
> >
> > Instead of limiting the automatic input-source selection only to the
> > mics (internal, external and dock mics), allow it for generic inputs,
> > e.g. switching between the rear line-in and the front mic.
> 
> the problem of addng line in jack to auto mic is line in does not has any
> boost (gain) but most mic have a boost control

I think it's pretty irrelevant.  The auto-mic switches only the I/O
direction.

> the other problem is those acer aspire 8930g notebook has internal 5.1
> speakers and three jacks which can support external 5.1 speakers
> 
> it seem the the channel mode control limit the max channels to 2 when there
> is internal 5.1 speaker

Again it's utterly irrelevant.


Takashi

> when channel mode is 6ch the mic jack is retasked as output and cannot be
> used
> 
> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/943386