On Tue, 16 May 2006, Matthias Schniedermeyer wrote:

> Hi
> 
> 
> I have a tree(*) of USB-Hubs with Devices that i want to be able to 
> switch off via a Switch.
> But as, at least, the first USB-Hub connected to the computer justs 
> switches over from Self-Powered to Bus-Powered it doesn't switch off 
> properly.
> 
> Can i configure the "Root" Port where i connected the first Hub so that 
> it doesn't allow a Bus-Powered Devices, resulting in switching off the 
> Hub when i cut it's power?

No, there's no way to turn off bus power at a root port.

Try looking here:

http://www.gniibe.org/ac-power-by-usb/ac-power-control.html

Alan Stern



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