Date: Mon, 29 Mar 2004 20:44:40 -0800 From: Wes Peters <wes@softweyr.com> To: freebsd-stable@freebsd.org, "Michael E. Mercer" <mmercer@nc.rr.com>, Julian Elischer <julian@elischer.org> Cc: freebsd-stable@freebsd.org Subject: Re: USB2 device Message-ID: <200403292044.40825.wes@softweyr.com> In-Reply-To: <1080619808.348.1.camel@fast.mmercer.com> References: <Pine.BSF.4.21.0403291600580.29660-100000@InterJet.elischer.org> <1080619808.348.1.camel@fast.mmercer.com>
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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.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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