no external mic

no external mic

[leon]

Hello,
i've Laptop Dell Inspiron 1520,
the internal mic works perfectly, but external mic doesn't work,

i've followed this link:
http://ubuntuforums.org/showthread.php?p=10352564
but it didn't help me,

here's the output of ALSA Information Script:
http://www.alsa-project.org/db/?f=3aa8a44412081f533b2de3e32aae76ff4370eae9
btw, i've been using Ubuntu, and Debian now, both have same
problem. so i haven't tried other Distributions.

any idea?
thanks.
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Re: no external mic

[Raymond Yau]

2011/3/23 leon <leon3000@gawab.com>

>
> Hello,
> i've Laptop Dell Inspiron 1520,
> the internal mic works perfectly, but external mic doesn't work,
>
> i've followed this link:
> http://ubuntuforums.org/showthread.php?p=10352564
> but it didn't help me,
>
> here's the output of ALSA Information Script:
> http://www.alsa-project.org/db/?f=3aa8a44412081f533b2de3e32aae76ff4370eae9
> btw, i've been using Ubuntu, and Debian now, both have same
> problem. so i haven't tried other Distributions.
>
> any idea?
>

The digital mic at 0x17 is connected to [audio selector] 0x1d

The other analog input (e.g. ext mic 0x0b,..) are connected to [audio
selector] 0x19

[audio selector 0x1d] can select either 0x17 or 0x19

There are two [audio selector] in the audio path from input pins to [Audio
Input]

Refer to the owner of Dell Vostro 1500

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=5288

It seem that alsa-driver-1.0.24 still has these bug since tthe driver does
not call set_mic_route() to setup those dmix_idx of mux_idx of ext mic and
digital mic

Re: no external mic

[Takashi Iwai]

At Fri, 25 Mar 2011 09:19:21 +0800,
Raymond Yau wrote:
> 
> 2011/3/23 leon <leon3000@gawab.com>
> 
> >
> > Hello,
> > i've Laptop Dell Inspiron 1520,
> > the internal mic works perfectly, but external mic doesn't work,
> >
> > i've followed this link:
> > http://ubuntuforums.org/showthread.php?p=10352564
> > but it didn't help me,
> >
> > here's the output of ALSA Information Script:
> > http://www.alsa-project.org/db/?f=3aa8a44412081f533b2de3e32aae76ff4370eae9
> > btw, i've been using Ubuntu, and Debian now, both have same
> > problem. so i haven't tried other Distributions.
> >
> > any idea?
> >
> 
> The digital mic at 0x17 is connected to [audio selector] 0x1d
> 
> The other analog input (e.g. ext mic 0x0b,..) are connected to [audio
> selector] 0x19
> 
> [audio selector 0x1d] can select either 0x17 or 0x19
> 
> There are two [audio selector] in the audio path from input pins to [Audio
> Input]
> 
> Refer to the owner of Dell Vostro 1500
> 
> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=5288
> 
> It seem that alsa-driver-1.0.24 still has these bug since tthe driver does
> not call set_mic_route() to setup those dmix_idx of mux_idx of ext mic and
> digital mic

Does the problem still persist with the very latest tree?
There have been some fixes regarding mic pins for IDT codecs.  This was
added after 2.6.38 release.


Takashi