I've got a clean Lubuntu 11.10 install. In the days that I've used Microsoft Windows, I've used an external microphone for calling with Skype. The microphone was plug-and-play, and no drivers were needed.
Right now, I'm using Skype on Lubuntu. I've installed PulseAudio, because it comes by default in Ubuntu, and it seemed wise to do so therefore. Whenever I make a test call, I won't get any input: it seems like the microphone doesn't record anything.
So, my question is: how can I get an external (line-in) microphone to work in Lubuntu?