movement – My laptop's webcam does not work on ubuntu 16.04

I installed a software called motion that uses the webcam, although I did not have enough patience to learn how to use it and uninstalled it with sudo apt purge. But after I did my webcam it stopped working.

lsusb -v | grep cam

Gives:

The device could not be opened, some information will be missing
The device could not be opened, some information will be missing
The device could not be opened, some information will be missing

I tried to run

sudo modprobe -r uvcvideo

and so

sudo modprobe uvcvideo

But it still does not work.

The strange thing is that the LED of the camera is still on. Can I have some spyware and messy software with it?

I can not use it with Cheese or Google Hangouts in Chrome. And I've also tried restarting the computer.
also

dmesg | grep cam
[    1.821760] usb 1-1.5: Product: Integrated_Webcam_HD
[   13.841178] uvcvideo: UVC device 1.00 found Integrated_Webcam_HD (0c45: 670b)
[   13.890386] input: Integrated_Webcam_HD: Integrate as /devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.5/1-1.5:1.0/input/input13

dmesg | video grep
[   13.262101] Linux video capture interface: v2.00
[   13.841178] uvcvideo: UVC device 1.00 found Integrated_Webcam_HD (0c45: 670b)
[   13.890306] uvcvideo 1-1.5: 1.0: The entity type for the extension of entity 4 was not initialized!
[   13.890309] uvcvideo 1-1.5: 1.0: The entity type for the extension of entity 3 was not initialized!
[   13.890310] uvcvideo 1-1.5: 1.0: The entity type for the processing of entity 2 was not initialized!
[   13.890312] uvcvideo 1-1.5: 1.0: The entity type for the camera of entity 1 was not initialized!
[   13.890460] usbcore: new uvcvideo registered interface driver
[  212.279744] uvcvideo: Error when consulting (GET_MIN) UVC control 11 in unit 2: -32 (exp.1).
[  216.240017] uvcvideo: Error when consulting (GET_MIN) UVC control 11 in unit 2: -32 (exp.1).
[  218.203670] uvcvideo: Error when consulting (GET_MIN) UVC control 11 in unit 2: -32 (exp.1).
[  220.362531] uvcvideo: Error when forwarding the URB video (-19).
[  220.362534] uvcvideo: Error when forwarding the URB video (-19).
[  220.362535] uvcvideo: Error when forwarding the URB video (-19).
[  220.362537] uvcvideo: Error when forwarding the URB video (-19).
[  220.362539] uvcvideo: Error when forwarding the URB video (-19).