I've got an ancient USB videocam (QuickCam Express, yes, 15 years old). I got it working under C7, after I removed the default loaded gspca_spca561, and replaced it with the previous driver, gspca_spca508. It also needed zc3xx. Then I updated and rebooted my system a couple of days ago, and now no /dev/video, no errors.... Any clues? mark "other than waiting for a camera to arrive from China somewhere in June or July?"