In my case, my scanner problem has been fixed (so far) by tuning off autosuspend:
# echo -1 >/sys/module/usbcore/parameters/autosuspend -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
