On Mon, 17 Jul 2006, Andreas Jellinghaus wrote:

> Hi,
> 
> how can I power down and up again a device from userland?

The only way to do it via USB is to get one of the few brands of USB hubs
that implements power switching and plug your device into the hub.  
There's a user program available that will tell a hub to turn off (or on)
the power to one of its ports.

Alan Stern



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