unexpected webcam side effect

[Tom Horsley]

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?