Hello everybody. Thanks for this thread! It saved me from further headache... I use Ubuntu 14.04 (64amd) on a Gigabyte G41M-ES2l (R.1.0). And my problem was also: User-acocunts --> Click --> and nothing (absolutely nothing) happend... Then I read this thread and realized that my USB-TV-Stick (streams Video and Sound from e.g. an old VCR (via Cinch) to USB Port and Soundcard) made by "Conrad Electronic" (DVD-Creator, VS-USB2800D) was still plugged in. As soon as I plugged it out... Boom! Everything worked! dmesg | grep em28 [ 7.057561] em28xx: New device @ 480 Mbps (eb1a:2860, interface 0, class 0) [ 7.057564] em28xx: Video interface 0 found: isoc [ 7.057639] em28xx: chip ID is em2860 [ 7.148382] em2860 #0: board has no eeprom [ 7.208131] em2860 #0: No sensor detected [ 7.218506] em2860 #0: found i2c device @ 0x4a on bus 0 [saa7113h] [ 7.243007] em2860 #0: Your board has no unique USB ID. [ 7.243039] em2860 #0: A hint were successfully done, based on i2c devicelist hash. [ 7.243069] em2860 #0: This method is not 100% failproof. [ 7.243092] em2860 #0: If the board were missdetected, please email this log to: [ 7.243121] em2860 #0: V4L Mailing List