This device works fine with 1.0.22.1 driver, but doesn't with 1.0.23. snd-usb-audio & Ko are loaded but to no good. alsamixer doesn't list the device and no device files in /dev/snd. Reverting back to 1.0.22.1 solves the problem. System: ASUS N51Vf laptop, OS: Fedora 12 2.6.31.12-174.2.3.fc12.x86_64