Re: [foxboro] 51F USB Mouse

Joe,
    We are using the current-version 50-foot USB extenders on our 51F's, and we
have not found a way to get the machine to re-find the USB devices after USB
power is lost or the cable disconnected, but we would certainly also be
interested in finding a way.

    Several things we seem to have found about the USB extenders:

1.    The USB extender needs to be powered at the remote end.  And it should be
using the same power source as is powering the Sun box.  This is important if,
for example, you want to be able to replace the pointing device or keyboard on
the fly.
2.    You can only have one pointing device connected.
3.    You can not switch between a mouse and trackball on the fly -- requires a
reboot.
4.    The Sun box won't boot without the USB powered and a pointing device
connected.
5.    The keyboard needs to be plugged into the first slot and the
trackball/mouse into the second on the USB extender in order for one to be able
to replace the pointing device (with a similar kind) on the fly.  That is, if
one unplugs the mouse and plugs it back in (or plugs another mouse in), it will
not work again until a reboot if the mouse is connected ahead of the keyboard on
the USB extender.  This is empirical data only -- I know there shouldn't be a
difference in the USB ports, but apparently there is some difference in the
order they are scanned, or some such thing.

    Perhaps someone else has some input on these USB extenders?

Rich Bakke
Longview Fibre Co.



We

"Joe Gale (MP)" wrote:

> We just upgraded several machines to the new 51F and are using the USB
> extenders to get out to the control room for the trackball and keyboard.  We
> have the problem of the USB devices not working after the power is lost to
> the USB extenderor or if the USB cable is disconnected.  The only way I have
> been able to get them working again is to telnet into the machine and reboot
> it.  Does anyone know a way to get the machine to automatically find the USB
> devices after re-connection or a command that can be run to find the USB
> device again?
>
>
> Thanks,
>
>
>
> Joe Gale
>
>
>
> DCS Administrator
>
> Minnesota Power
>
>
>
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