Here's some behavior I've never seen before: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=247224 My motherboard's CK804 audio system utterly vanishes if I have the webcam plugged in at boot time :-). Doesn't have anything to do with the highly alpha uvcvideo driver I was playing with because I found it fails even if the uvcvideo driver isn't installed. Apparently it is something about the USB microphone component of the webcam that gets linux confused at boot time. Anyone ever seen a USB device hide a non-USB device like this?