On Fri, 9 Feb 2007, Jon Smirl wrote:

> Reading through that doc it appears that the device operates in a USB
> standard mode and PSA2 mode ( a MS Windows mode).
> 
> Maybe when it is resuming it is resuming to MS Windows mode instead of
> the USB standard mode, or the other way around.
> 
> There is a command for getting the mode back:
> 0x80: Report Current PSA2 Mode State
> 
> When you plug it under Ubuntu the buttons for volume and mute work and
> generate UI on the desktop. It looks like the thing needs to be in
> PSA2 Mode for those controls to work.  Could it be that the device is
> not reporting the resume event up the stack to wherever this control
> software is, and the control software is confused about what state it
> in?

As far as I can tell, nothing at all gets reported up the stack.  Maybe 
the usbhid driver needs to do a Get-Report as part of its resume 
processing.

Alan Stern


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