snd_hda recording in 7.1?

Alexander Motin mav at
Wed Mar 4 16:37:07 PST 2009

Daniel O'Connor wrote:
> On Thursday 05 March 2009 07:02:04 Alexander Motin wrote:
>> on 04/03/2009 05:25 Daniel O'Connor said the following:
>>> Does anyone have sound recording via snd_hda working in 7.1?
>> I see you have 2 mic inputs. Have you tried to record from `monitor`, it
> No luck there, I tried via analogue and recording.
> ie run 'mixer monitor 80' and tap the mic.
> then try 'mixer monitor 0; mixer rec 80; mixer =rec monitor' and record with
> sox.
>> is a second mic. Verbose dmesg could give more info.
> OK, I though the sysctl would be noisy enough :)

Try to comment out HDA_CODEC_ALC883 switch section of hdac.c near line 
4650. There is an old hack related to mic reference voltage to 
workaround some problems. May be it is not applicable here.

Alexander Motin

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