I've never really had any luck with Webcams under linux. The one I had was an OV511 which should be fully supported. It never worked despite distro or driver. It was probably the only piece of hardware I couldn't get working eventually.
Doesn't work via Genesys Logic USB2.0 Hub, needs to be directly connected or via Alcor Hub. Not sure whether IR LEDs work under Linux for operation in low-light conditions. ALSA appears to create device nodes for built-in microphone, but doesn't appear possible to get samples from it.