While chatting with dminor the other day he mentioned his camera stopped working and after a reboot there was no mention of the camera hardware in the logs or via dmesg. His conclusion, the camera was not working. Since I have the same hardware and run Ubuntu 13.10 as he does he wanted a sanity check. My only suggestion was to turn off the computer, unplug it and take the battery out, wait 30 seconds then reassemble and power on.
Hey my suggestion worked and now dminor has a working camera again.
This general concept of reseating hardware is something that is easily forgotten, yet is so effective.