[LAU] Jack, HDA and mic input

[Paul Davis]

On Thu, Apr 29, 2010 at 5:46 PM, Alexandros Diamantidis <adia at hellug.gr>wrote:

> * Paul Davis [2010-04-29 16:43]:
> > use a h/w mixer control application (e.g. the ugly and terminal-based
> > but-so-far-unmatched alsamixer) to set the capture source of the device
> back
> > to, perhaps, "line in". then later, switch it to the "mic".
>
> Thanks, that worked. Strange thing is I actually had to set the capture
> source first to "Stereo Mixer" and then to "Mic" - the other sources
> (CD, Line, Front Mic, Stereo Mixer, or setting "Front Mic" and then
> "Mic") all exhibited the same behaviour, but setting it to "Stereo
> Mixer" and then to "Mic" and leaving it there allowed starting jack with
> nothing connected to any jack. I wonder why the source selected *before*
> switching to "Mic" matters!
>

the wonders of the world of Intel HDA ... if you care about recording music,
you'll get something else when you can.


> Also, it seems there's no need to connect an actual mic - connecting just
> a 1/4" to 3.5mm adapter works just as well. I think I'll just leave it
> plugged in.
>

correct. Jack sensing is a purely mechanical thing. there's no complex
"detection" going on.

--p
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