On My Dell laptop with Light burn 0.9.20 with Camera LattePanda 5M or Laptop WebCam, I get a Black screen on camera view.
My Operating system is Xubuntu 18.04 LTS.
the both camera are working well under Linux Xubuntu 18.04 LTS with the application Cheese and Camorama
I ansered me because I found the solution : adding permission to camera
sudo chown root:video /dev/video0
sudo chmod 660 /dev/video0