After installing latest ALSA drivers the problem is still there.

The only effect I see is that Front Mic Boost was renamed in Internal
Mic Boost in alsamixer. But turning boot on it produces noise only.

attached:
/proc/asound/card0/codec#0 dump while Mic Boost is max

** Attachment added: "+proc+asound+card0+codec#0.out"
   
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/682065/+attachment/1748103/+files/%2Bproc%2Basound%2Bcard0%2Bcodec%230.out

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acer aspire 1551 build in mic is not working in pulseaudio apps
https://bugs.launchpad.net/bugs/682065
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