Webcam is not working

I realized that webcam is not working anymore. I can’t find any device at /dev/video*.

 v4l2-ctl --list-devices
Cannot open device /dev/video0, exiting.

What system is this for?
Is this a USB camera or is this on a notebook and which notebook?

Commonly it is either:

  • unplug/replug-in a USB Camera (so it reloads)
  • Or confirm the driver is loaded

Check for drivers:
$ lsmod | grep video

Reload the driver would depending on camera/connection.

Also you can check:
$ sudo dmesg | egrep -i “video|camera”