usb 3.0 support on Linux

>  
> Hey guys,
>
> I'm having troubles with enchanting application (
> http://enchanting.robotclub.ab.ca/Enchanting+On+Linux), as you know based
> on squeak. In particular the problem is, running Enchanting on Ubuntu 12.04
> and squeak-vm 4.10, the frontend isn't detect the presence of the Lego
> Brick when is connected through USB port.
>
> I guess that the problem is the type of USB port, because when use
> Enchanting on a PC with USB 2.0 with the same software environment, Ubuntu
> 12.04 + squeak-vm +Enchanting version, all work fine.
>
> However when i try on a PC with USB 3.0 the frontend isn't detecte the
> brick.
>
> Other additional information, Ubuntu 12.04  use for USB 2.0 ehci-pci driver
> module and for 3.0 use xhci_hcd.
>
> So my guess is,  could be some incompatibility with xhci_hcd driver module.
>
> My question is, where I can start to find this issue, on squeak-vm or on
> enchanting image ?
>
> Where is handle the usb connection on squeak-vm or at image level ?