I bought a new webcam recently. The camera worked with Ubuntu as soon as I plugged it in but but the microphone didn't work with Skype until I set it up. This is very easy but it took me a very long time to figure out so I thought I'd make a note here in case anyone has the same trouble.
My setup is as follows:
- Xubuntu 12.10, 13.04
- Skype 4.1
- Logitech c270 webcam
- Sign into Skype and open the options, go to the 'sound devices' tab.
- Start a test call. Before the call is finished, open PulseAudio Volume Control and go to the 'Recording' tab.
- Still while the test call is going on - change the Skype input to the Webcam microphone.