Both of your Mic Boosts are set to zero:
Simple mixer control 'Front Mic Boost',0
Capabilities: volume penum
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 2
Front Left: 0 [0%] <---
Front Right: 0 [0%] <---
Simple mixer control 'Mic Boost',0
Capabilities: volume penum
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 2
Front Left: 0 [0%] <---
Front Right: 0 [0%] <---
** Package changed: pulseaudio (Ubuntu) => alsa-driver (Ubuntu)
** Changed in: alsa-driver (Ubuntu)
Status: New => Incomplete
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Lucid Linx: built in microphone doesn't work anymore
https://bugs.launchpad.net/bugs/571294
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