Comment 92 for bug 843431

Joseph, I tested the 3.2-rc1-oneiric candidate you pointed to, and it resolves the issue for my Logitech Webcam C310 webcam.

By they way, with the affected kernels, apart from the workaround already posted (putting "default-sample-rate = 16000" in ~/.pulse/daemon.conf)

I learned of another workaround; passing the following option to the kernel on boot time: usbcore.autosuspend=-1

This workaround works well. Of course it turns off the feature than allows USB devices to "autosuspend" to reduce energy consumption when not in use.