On Tue, 3 May 2005, Marco Schramel wrote:

> Hi all,
> 
> Is it possible to disable a single port on a hub? On this port is a
> device and sometimes it should be without bus powered supply voltage.

Yes, it's possible.  However Linux does not include a good way to do it.

In principle one could write a program that would use usbfs to unbind the 
hub driver from the hub and then send the hub a command to power-off the 
port.  Doing this would, however, compromise the system's ability to 
handle all the other ports on the hub.

And by the way, disabling a port is not the same as turning off its Vbus 
power supply.  Those are two different operations.

Alan Stern



-------------------------------------------------------
This SF.Net email is sponsored by: NEC IT Guy Games.
Get your fingers limbered up and give it your best shot. 4 great events, 4
opportunities to win big! Highest score wins.NEC IT Guy Games. Play to
win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20
_______________________________________________
linux-usb-devel@lists.sourceforge.net
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel

Reply via email to