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I was using skype when the computer automatically suspended/hibernated due to the battery condition. but when right after I switch on the computer and use skype all I get is a black screen from my webcam, the other party can't see a thing. I'm using ubuntu 13.04 64 bit version. Can you help me out, I installed cheese and it too gives me the black screen. thanks.

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Try sudo modprobe -r uvcvideo, then sudo modprobe uvcvideo. – Jeremy Jan 2 '14 at 7:46
both of them executed without errors, but still getting the black screen – Sudheera Jan 2 '14 at 7:57
Do the first command, then cheese. Does it say "no device found"? – Jeremy Jan 2 '14 at 7:58
no error msgs. but before when I started cheese the indicator near the webcam turned on, now when I did the first command and cheese the indicator keeps off. – Sudheera Jan 2 '14 at 8:03

Since I cannot found a error or a fix for the problem, I tried switching off the lap by long-press power key and turn on again. Well, surprisingly it worked. :)

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