Acer eMachines eM350
Machine 00:1b.0 0403: 8086:27d8 (rev 02)
Subsystem: 1025:0349
Codec: Realtek ALC272X
Vendor Id: 0x10ec0272
Subsystem Id: 0x10250349
Revision Id: 0x100001
essentially bug#639846 (first raised for 10.04, but still present in
12.04
Note: I confirmed this bug by recording direct from hardware
pasuspender arecord -Dhw:0 -fcd -d5 mic.wav
Then view waveform in Audacity to confirm that one channel is inverted version
of the other
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https://bugs.launchpad.net/bugs/1002978
Title:
[meta-bug] Inverted Internal microphone (phase inversion)
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