Re: USB v?

The bcdUSB field from lsusb is what tells what version the device is
using.

John Schember


On Mon, 2007-03-05 at 07:11 -0700, Eric "Shubes" wrote:
> der.hans wrote:
> > moin moin,
> >
> > anyone know how to tell what USB protocol version is being used to talk to
> > a device?
> >
> > I'm pretty certain the devices is v 2.0 capable. I'm not sure about the
> > USB port it's connected to. Any way to find out what versions the physical
> > port supports?
> >
> > Any way to find out what version is actually being used to talk to the
> > device?
> >
> > It's probably in the lsusb output somewhere, but it's not making sense to
> > me right now.
> >
> > ciao,
> >
> > der.hans
>
> On my system, lspci shows USB 1.0 clear as day.
>
> I don't know about what version is actually being used though. That would be
> an attribute of the connection. I'm guess it'd be in /proc somewhere (when
> the device in question is connected, of course).
>
> Methinks you might need a little sleep, dh. ;)
>

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