problem with usb hub when plugging in usb hard drive or usb flash disk

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1

Hi, all:
I have one powered usb hub. but when I have the usb hard drive inside,
it will give message like this: usb 1-1.4: reset high speed USB device using musb_6.
Then mouse and key board won’t work.
does anybody meet same situation or know how to fix it?
Thank you very much
Frank
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2

Here is one theory is to what is going on:

http://elinux.org/BeagleBoardFAQ#USB_OTG_connection_.233

3

If this theory works it would probably help to use two usb hubs in
cascade.
idea is that you connect to the 2nd one and that the 1st one will
dampen the power glitch
Appreciate any reports on experiences.