Can reproduce on following systems with Trusty 4.4, the usb webcam device is /dev/video0 instead of /dev/external_webcam.
201612-25281: Base image: dell-bto-trusty-berlinetta-p-X29-iso-20160115-1 Current kernel: 4.4.0-96-generic #119~14.04.1
201507-18778: Base image: dell-bto-trusty-dino2-X29-iso-20160118-0 Current kernel: 4.4.0-96-generic #119~14.04.1
Can reproduce on following systems with Trusty 4.4, the usb webcam device is /dev/video0 instead of /dev/external_ webcam.
201612-25281: trusty- berlinetta- p-X29-iso- 20160115- 1
Base image: dell-bto-
Current kernel: 4.4.0-96-generic #119~14.04.1
201507-18778: trusty- dino2-X29- iso-20160118- 0
Base image: dell-bto-
Current kernel: 4.4.0-96-generic #119~14.04.1