Lenovo built-in webcam only works when laptop is plugged in.
I am using a Lenovo IdeaPad N586 running Ubuntu 13.04 as its primary OS.
For some reason my built-in webcam will only work when my laptop is plugged in to a power supply. On battery, it only gives me a black screen on Cheese and Skype. This had me terrified before I noticed the pattern. I'm very happy that I know how to make my webcam work, but this fix makes no logical sense to me.
I was thinking of reporting this as a bug, but I thought it would be best to run it by here first.