Same here. With windows everything works fine. With Ubuntu 8.10 everything 
works as long as no usb hub is connected. (I tried 2 different hubs that both 
work without problem in Windows XP on the same computer.) Front USB is always 
low speed, back USB is high speed.
If an usb hub is connected, most USB devices stop working as soon as anything 
apart from an USB mouse is connected to the hub or to the standard usb ports. 
My USB keyboard continues working all the time, as long as I don't connect it 
to the usb hub.
Details attached.


The good news: I just tested the 9.04 alpha 2 live CD and everything worked 
fine with exactly the same setup! With 8.10 live CD it did not.

** Attachment added: "usbhub"
   http://launchpadlibrarian.net/20726578/usbhub

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usb hub causes usb device freeze
https://bugs.launchpad.net/bugs/225718
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