Okay, is one of the USB devices an external drive? If so, test with the external drive disconnected.
One of your USB devices is not responding correctly when the USB controller attempts to assign it an address. A common reason for this is the USB device isn’t getting enough power, which can happen with hubs and external hard drives during the boot process if they are not externally powered (because the PC is using power for other stuff).
ok, disconnecting the hub and using the pc-usb only seems to have worked around the booting issue (but i don’t really understand, since it worked few weeks ago just fine and i’d like to keep using the hub as the pc is build in and i’d have a easy connection outside) though the xone-dongle still don’t work , but i guess, i need to open a new thread for it, don’t i? 