Louis-David Mitterrand wrote:
> My question is: at the X level how can one discriminate between input
> from the keyboard and the usb headset's volume control?
>
>   
No.

> Or is there another way to do it?
>   

Yes.  Google for evtest.c -- you can read events directly from a 
/dev/input/eventN -- there's one of those for each distinct input device.

jch

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