After I managed to get the sound working on my Acer Aspire 4320 running Gutsy Gibbon, I also tried to get the built-in microphone to work, and/or an external microphone. At first I didn't manage to make it work, but then I read some information at the bottom of Gutsy Intel HD Audio Controller, the same page that helped me to make the Intel 82801H HD Audio Controller produce sound on my notebook, and decided to experiment a bit more. And after a short time I managed to get both the internal microphone as well as an externally connected microphone (by Genius) to work.
Read the rest of Making microphones work on the Aspire 4320.
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