After some ubuntu update recently, my webcam has stopped working with Skype after my computer has been on for a while. It still works if I restart my computer, then open skype and try to use it, but it has yet to work hours after that (perhaps because I am hibernating in between, not sure).

It appears that what is happening is that the camera is "busy" but that is just my impression.

Is there any way to "restart" the webcam via a terminal command while the computer is on? Or alternatively, does anyone know what could be happening with the camera not starting?