[precise][SRU][PATCH] [Lenovo IdeaPad U300s, Conexant CX20590, Mic, Internal] Background noise or low volume (phase inversion)

[Chris J Arges]

BugLink: http://launchpad.net/bugs/903853

Precise SRU Justification:

Impact:
IdeaPad U300s's microphone is quiet/noisy.

Fix:
These patches by David Henningsson in Quantal were backported to Precise.

Testcase:
Using the IdeaPad U300s, try capturing audio using the microphone and
ensure it works properly.

2 Patches Attached.

Thanks,
--chris j arges
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