[alsa-devel] Internal Mic Boost channel is unused

Nathanael D. Noblet nathanael at gnat.ca
Wed Oct 9 21:46:48 CEST 2013

On 09/16/2013 03:57 PM, David Henningsson wrote:
> Matching this with your alsa-info, we can see that 'Mic Jack'
> corresponds to 0x1b and 'Mic Jack', index=1 corresponds to 0x1a.
> Hence you could try turning pin 0x1a to "not connected" in
> hda-jack-retask. (I don't know how/if hda-jack-retask is packaged in
> Fedora, but it is part of alsa-tools.)
> If this resolves your problem, we could then try making that the default
> in upcoming kernels, but the question is we really dare to do that,
> without clear confirmation that 0x1a is actually useless. In current
> state it's a bit buggy, but if the headphone jack is actually a headset
> jack turning that off would make the headset mic go from "needs manual
> adjustment to work" to "completely unusuable".

So that adjustment allows the internal microphone to be useable. However 
the mic in jack is now completely unusable. With a headset or a plain 


Nathanael d. Noblet
t 403.875.4613

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