* Your usb printers will be managed via libusb which collides with kernel module.
 * cups-1.4.8 requires the USB_PRINTER support disabled.
 * Please disable it:
 *     CONFIG_USB_PRINTER=n
 * in /usr/src/linux/.config or
 *     Device Drivers --->
 *         USB support  --->
 *             [ ] USB Printer support
 * Alternatively, just disable the usb useflag for cups (your printer will still work).