Am also having the same problem. Running up-to-date Karmic. I installed
linux-backports-modules-alsa-karmic-generic and rebooted but the mic is
still not working.
The audio output is also extremely quiet until I install alsamixer and
manually turn up the Master F setting. I also turned the mic gain up to
max but this doesn't seem to help.
I have a Clevo M67SU Laptop with similar sound h/w:
05:01.0 Audio device: VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High
Definition Audio Controller) (rev 10)
Subsystem: VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High
Definition Audio Controller)
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at dc000000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
--
No record-signal from internal mic (Notebook, Sigmatel, HDA Intel)
https://bugs.launchpad.net/bugs/480815
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