Re: [gentoo-user] Anyone get Acer laptop internal microphone working in Gentoo?

[Mick]

On Monday 21 February 2011 01:33:22 Walter Dnes wrote:
> On Sun, Feb 20, 2011 at 12:09:27PM +0000, Mick wrote
>
> > Indeed, the Gentoo Alsa Guide still says pretty much the same thing:
> >
> > "Please note that for ease of use, all examples show ALSA built as
> > modules. It is advisable to follow the same as it then allows the
> > use of alsaconf which is a boon when you want to configure your card."
> >
> > I've added some options for my alsa modules in
> >
> > /etc/modprobe.d/alsa-base.conf, e.g.:
> >   options snd-hda-intel enable_msi=1
>
>   This is exasperating.  After re-building alsa sound support as kernel
> modules, rather than built into the kernel, I see some improvement.
> When I blow into the internal mic I hear it from the laptop speakers.
> With mic-boost turned up, I can hear myself echoing when I talk into the
> internal mic or into an external mic.  Turn up the boost high enough,
> and the external mic generates a mean high-ptched feedback squeal,
> unless I also plug in headphones.
>
>   So the hardware is working now, *BUT I STILL CAN'T RECORD THE BLEEPING
> THING*.  When I try "ffmpeg -f oss -i /dev/dsp audio.wav" it thinks it's
> recording, but the output file is only hiss.   Ditto for the command
> "ffmpeg -f alsa -i plughw:0,0 audio.wav".
>
>   I notice that I have a file named /etc/modprobe.d/alsa.conf but no
> alsa-base.conf file.  Should I rename it?

No, just create your alsa-base.conf and add the desired options in there.

From what you're saying the microphone works now - not sure why it won't 
record ... I'm not the best man to advise on recording because I have never 
tried it.
-- 
Regards,
Mick