Oliver Neukum wrote:
> this patch implements autosuspend for USB audio devices.

The Creative Audigy 2 NX mutes itself when being suspended but doesn't
unmute when resuming. (Apparently, this self-powered device treats
supend the same as disconnection.)

The Roland SC-8820 resets itself when being resumed and loses all
parameter settings.  Furthermore, it should be possible to use this
device with its external input even when the computer isn't accessing
it.

The Edirol UA-1A resumes OK (but it doesn't have any internal state).

Your patch doesn't touch usbmidi.c -- USB MIDI devices are suspended
even when they're being used.


Regards,
Clemens
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