Re: USB2 device

From: Michael E. Mercer (mmercer_at_nc.rr.com)
Date: 03/30/04

  • Next message: Julian Elischer: "Re: USB2 device" 
    To: Wes Peters <wes@softweyr.com>
Date: Mon, 29 Mar 2004 23:49:50 -0500

    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.

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