hype-o-thetic?com

1. Edit /etc/default/grub and add:
   GRUB_CMDLINE_LINUX="usbcore.autosuspend=-1"
2. Run update-grub
3. Edit /etc/crontab add:
   @reboot root echo -n USB0 > /proc/acpi/wakeup
4. Plug the USB Receiver into the lowest port under the PS/2 connector
5. Reboot

I am using Ubuntu 9.10 and XBMC 9.11.

SOURCE: http://www.minimyth.org/forum/viewtopic.php?f=6&t=2524