Bug#664068: USB MIDI keyboard fails to initialize

[Olivier MATZ <zer0@droids-corp.org>]

Hello,

I have the same issue with my laptop and the same midi keyboard (M-Audio
KeyRig 49).

I think I found a workaround for this problem: if I disable power
management just after the midi keyboard is plugged, it seems it always
work:

1/ plug the keyboard
2/ wait less than 1 second
3/ then type as root: echo on > /sys/bus/usb/devices/2-1.1/power/control
   (the 2-1.1 has to be replaced by the ID on your USB bus)

I tested it 5 times and it was always working. I hope it can help
to understand the root cause of the problem. There is probably a way
to do that automatically when the device is plugged, I will post it
here if I find it.