So I'm using Elementary Luna Beta (based on Ubuntu 12.04 LTS) on a spare HDD after successfully using Jupiter release (based on 10.10) for many years.

In Jupiter I had my internal mic work out of the box and with Skype installed from deb it was all setup without having to step foot inside the terminal.

In Luna Beta the internal mic is not recognised by the OS and so also not recognised by Skype.

I believe the hardware is this (from sudo lshw):

    *-multimedia
         description: Audio device
         product: 82801I (ICH9 Family) HD Audio Controller
         vendor: Intel Corporation
         physical id: 1b
         bus info: pci@0000:00:1b.0
         version: 03
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list
         configuration: driver=HDA Intel latency=0
         resources: irq:46 memory:f8600000-f8603fff

As well as this I ran cat /proc/asound/card0/codec* | grep Codec

which gave me:

    Codec: IDT 92HD73C1X5
    Codec: Intel Cantiga HDMI

How do I tweak Luna to get this hardware working properly?

I'm able to switch out my Luna HDD with the Jupiter HDD to help troubleshoot what the differences are between the two and why the more recent OS can't find / use the mic correctly.

Thanks in advance for any help you can give.