USB2 device

[Michael E. Mercer]

Wes,

Thanks for the info. However it works just fine plugged into that hub
when running winblows...

Any ideas?

Thanks
Michael

On Mon, 2004-03-29 at 23:44, Wes Peters wrote:
> On Monday 29 March 2004 20:10, Michael E. Mercer wrote:
> > Julian,
> >
> > It works if I plug it directly into a usb port on my PC. But it does
> > not get seen if I plug it into a SIIG SlimHub 2.0.
> >
> > Any ideas?
> 
> Yeah, look at the power requirements:
> 
> > > jtest# usbdevs -v
> > > Controller /dev/usb0:
> > > addr 1: low speed, self powered, config 1, UHCI root hub(0x0000),
>                        ^^^^^^^^^^^^
> > > Intel(0x0000), rev 1.00
> > >  port 1 powered
> > >  port 2 addr 2: low speed, self powered, config 1, HP ScanJet
>                                ^^^^^^^^^^^^
> > > 6200C(0x0201), Hewlett-Packard(0x03f0), rev 1.00
> > > Controller /dev/usb1:
> > > addr 1: low speed, self powered, config 1, UHCI root hub(0x0000),
>                        ^^^^^^^^^^^^
> > > Intel(0x0000), rev 1.00
> > >  port 1 powered
> > >  port 2 powered
> > > Controller /dev/usb2:
> > > addr 1: low speed, self powered, config 1, UHCI root hub(0x0000),
>                        ^^^^^^^^^^^^
> > > Intel(0x0000), rev 1.00
> > >  port 1 powered
> > >  port 2 powered
> > > Controller /dev/usb3:
> > > addr 1: low speed, self powered, config 1, EHCI root hub(0x0000),
>                        ^^^^^^^^^^^^
> > > (0x8086)(0x0000), rev 1.00
> > >  port 1 powered
> > >  port 2 powered
> > >  port 3 powered
> > >  port 4 powered
> > >  port 5 powered
> > >  port 6 addr 2: low speed, power 200 mA, config 1, JUMPDRIVE
>                                ^^^^^^^^^^^^
> > > PRO(0x0200), LEXAR   MEDIA(0x05dc), rev 0.00
> 
> This has to be plugged into a powered port.  On a USB hub, this means the 
> hub has to have it's own external power supply, typically a wall-wart.  
> The ports on your computer are typically powered and should be able to 
> power a 200 mA device with no problem.  If this is a tiny hub used with a 
> laptop, see if you can find one that has a battery bay.