[alsa-devel] No sound with Sony VAIO VPCZ1 (ALC889)

Adam Williamson awilliam at redhat.com
Tue Jul 9 20:53:47 CEST 2013

On 2013-07-08 10:48, Takashi Iwai wrote:

>> Ah, yes, I'd forgotten about that little wrinkle. I don't pretend to 
>> be
>> following the exact details of the planned fix here, but just as a
>> high-level remark, this 'extra mic jack' seems very much like an
>> implementation detail for the noise cancellation which Linux does not 
>> do
>> in any case (AFAIK). It wouldn't make sense to me to expose it as a
>> 'normal' mic jack, exactly. It's not like you can plug an actual
>> microphone into this 'mic jack' and use it. How will it be exposed
>> exactly after the patch, tiwai?
> Well, Tormen's description sounds like it being a mic for a headset,
> no?

No, at least IIRC - the special headphones that come with the system 
aren't for voice calling or whatever, they're active noise cancelling 
http://forum.notebookreview.com/sony/501220-sony-noise-cancelling-ear-phones-came-vaio-z-3.html is a thread about them, for e.g.

> If so, it's not for a noise canceling, and we can expose the jack
> and the control of the secondary mic simply as "Headset Mic".
> In anyway, this will be a separate fix.

Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora

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