~>  /usr/local/libexec/cups/backend/hp
usb_set_debug: Setting debugging level to 4 (on)
usb_os_find_busses: Found /dev/usb0
usb_os_find_busses: Found /dev/usb1
usb_os_find_busses: Found /dev/usb2
usb_os_find_busses: Found /dev/usb3
usb_os_find_busses: Found /dev/usb4
usb_os_find_busses: Found /dev/usb5
usb_os_find_busses: Found /dev/usb6
usb_os_find_busses: Found /dev/usb7
usb_os_find_devices: Found /dev/ugen0 on /dev/usb3
usb_control_msg: 128 6 512 0 0x7fffffff8600 8 1000
usb_control_msg: 128 6 512 0 0x802213080 124 1000
usb_control_msg: 128 6 770 1033 0x7fffffff8570 255 5000
usb_control_msg: 128 6 771 1033 0x7fffffff8570 255 5000
USB error: error sending control message: Input/output error
direct hp:/usb/Photosmart_C4200_series?serial=0 "HP Photosmart C4200 series" "HP Photosmart C4200 series USB 0 HPLIP" "MFG:HP;MDL:Photosmart C4200 series;CLS:PRINTER;DES:Photosmart C4200 series;SN:;"