[alsa-devel] VT1705 : Mic not working with power_save

[Anisse Astier]

(adding back list in Cc, it was lost)

On Mon, 13 Feb 2012 10:02:27 +0800, <LydiaWang at viatech.com.cn> wrote :

> > -----邮件原件-----
> > 发件人: Anisse Astier [mailto:anisse at astier.eu]
> > 发送时间: 2012年2月11日 1:56
> > 收件人: alsa-devel at alsa-project.org
> > 抄送: Takashi Iwai; Lydia Wang
> > 主题: VT1705 : Mic not working with power_save
> > 
> > Hi,
> > 
> > On the hardware described in attached alsa-info (VT1705), I have the
> > following problem:
> >  - mic doesn't work
> >  - if, while recording, we switch "input source", mic works during the
> >    recording session.
> > 
> > Passing power_save=0 as a parameter to snd-hda-intel solves the problem.
> > 
> > It was reproduced on linus' master branch, tiwai's for-next branch,
> > and 3.2 branch.
> > 
> > Regards,
> > 
> > Anisse
> 
> Hi,
> 
> The log showed that your machine had two microphones, one is an internal mic,
> and the other is a rear mic. Which microphone did you use? The log showed
> currently used mic is the internal mic. The rear mic was not plugged in a jack.
> 
> Lydia

On this hardware, there's only an internal mic, and no physical jack to
plug another input.