Raspberry Pi and powered USB hub

[wb4jfi at knology.net]

Thank you Tad!
Terry

-----Original Message----- 
From: Tad
Sent: Friday, August 24, 2012 11:36 PM
To: Terry Fox
Cc: tacos at amrad.org
Subject: Re: Raspberry Pi and powered USB hub

This may help:
http://hardware.slashdot.org/story/12/08/24/2228251/serious-problems-with-usb-and-ethernet-on-the-raspberry-pi

-Tad

On Fri, Aug 24, 2012 at 11:32 PM, Terry Fox <tfox at knology.net> wrote:
> I’ve received on of my Raspberry Pi boards, and am playing with it.  I 
> have
> it controlling a Softrock Ensemble RxTx via the USB port.  However, I’ve
> noticed that for some reason whatever is plugged into the USB hub that I 
> use
> to expand the number of USB ports periodically “goes away”, that is the
> keyboard, mouse, and whatever else stop working for a short period, then
> comes back to life.
>
> This happens with two different USB hubs, both are "”powered hubs” with
> separate power supplies.  The older one has LEDs that show enabled status,
> and those LEDs all go out at once whenever the problem occurs, then they
> light back up.  The newer hub (brand new) doesn’t have LEDs, but otherwise
> exhibits the same problem.
>
> I am using the powered hub for only the keyboard and mouse, and have tried
> different keyboards and mice (meeces).  So, I doubt there is a problem 
> with
> too much current being drawn.  Both hubs work fine on a regular computer.
>
> Anybody else having problems with the Pi and powered hubs?
> Terry, WB4JFI
>
>
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