My camera is no longer recognized by the graphic i/f, i.e window. But lsusb shows it is connected, by name. For the last year or so it has been ok, used several times per month. I rebooted to MS Windows, which instantly recognized the camera, and permitted me to copy new important pics to my pc. Rebooted to linux (Ubuntu 12.04), camera still not recognized. I'm happy to use terminal commands: where do I find the tricks?