I have a "Gearhead WCF2600HDBLU" camera and I'm trying to get it to work in Ubuntu 13.04. It is a known-working camera, and
lsusb has the following relevant output:
Bus 002 Device 005: ID 0ac8:3420 Z-Star Microelectronics Corp. Venus USB2.0 Camera
Cheese shows a black screen, and GUVCVIEW demands that I install the camera.
A little help?