[alsa-devel] detect extern/internel mic

xinyun liu xinyunliu.osc at gmail.com
Thu May 10 22:24:22 CEST 2007

I have test on my laptop by playing a long .wav file.

During playing, I plugged the external headphone, and the sound is
continuously and switch from external headphone to internal speaker.
It uses hda-intel driver. Does this mean it's the hardware do it?


2007/5/10, Takashi Iwai <tiwai at suse.de>:
> At Thu, 10 May 2007 00:43:07 +0800,
> xinyun liu wrote:
> >
> > It's interesting that when I plug in a headphone or an external
> > microphone, the build in headphone and microphone will not work.
> >
> > Is it a driver feature or the hardware do it?
> >
> > Can anyone give some clue? I'd like to see the code but don't know how
> > to start. Please give me help. Thx!
> Needs more hardware information of your device for better diagnosis.
> I guess it's a hardware, but some hda-intel drivers do that by
> themselves for usability, for example.
> Takashi

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