From owner-freebsd-multimedia@FreeBSD.ORG  Fri Dec 30 17:02:35 2011
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From: Mathias Picker <Mathias.Picker@virtual-earth.de>
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Subject: M-Audio Oxygen 49: snd_uaudio cycles (loads, detaches, loads....
 ad infinitum)
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I just got an 3rd gen oxygen 49 midi master keyboard, which is class
compliant.

Switching it on gives:

Dec 30 17:36:23 mp kernel: uaudio0: <M-Audio Oxygen 49, class 0/0, rev
1.00/1.00, addr 2> on usbus5
Dec 30 17:36:23 mp kernel: uaudio0: No playback!
Dec 30 17:36:23 mp kernel: uaudio0: No recording!
Dec 30 17:36:23 mp kernel: uaudio0: MIDI sequencer
Dec 30 17:36:23 mp kernel: pcm3: <USB audio> on uaudio0
Dec 30 17:36:24 mp kernel: uaudio0: at uhub5, port 4, addr 2
(disconnected)
Dec 30 17:36:24 mp kernel: pcm3: detached
Dec 30 17:36:24 mp kernel: uaudio0: <M-Audio Oxygen 49, class 0/0, rev
1.00/1.00, addr 2> on usbus5
Dec 30 17:36:24 mp kernel: uaudio0: No playback!
Dec 30 17:36:24 mp kernel: uaudio0: No recording!
Dec 30 17:36:24 mp kernel: uaudio0: MIDI sequencer
Dec 30 17:36:24 mp kernel: pcm3: <USB audio> on uaudio0
Dec 30 17:36:26 mp kernel: uaudio0: at uhub5, port 4, addr 2
(disconnected)
Dec 30 17:36:26 mp kernel: pcm3: detached


and so on. I tried a different usb port and cable, just in case, but the
behaviour stays the same.

What can I do to get and give a more detailed error report, or even to
fix it ;)

Thanks, Mathias