$ hp-setup --logging=debug

HP Linux Imaging and Printing System (ver. 3.14.3)
Printer/Fax Setup Utility ver. 9.0

Copyright (c) 2001-13 Hewlett-Packard Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

hp-setup[5493]: debug: param=
hp-setup[5493]: debug: selected_device_name=None
hp-setup[5493]: debug: Sys.argv=['/usr/bin/hp-setup', '--logging=debug'] printer_name=None param= jd_port=1 device_uri=None remove=False
hp-setup[5493]: debug: Starting GUI loop...
Searching... (bus=usb, search=(None), desc=0)
hp-setup[5493]: debug: Bus 002 Device 003: ID 03f0:4f17 Hewlett-Packard Color LaserJet CM1312 MFP
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 004: ID 044e:3012 Alps Electric Co., Ltd
Bus 007 Device 003: ID 044e:3013 Alps Electric Co., Ltd
Bus 007 Device 002: ID 044e:3011 Alps Electric Co., Ltd
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 002: ID 046d:c01b Logitech, Inc. MX310 Optical Mouse
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 05ca:183b Ricoh Co., Ltd Visual Communication Camera VGP-VCC8 [R5U870]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

hp-setup[5493]: debug: Product['HP Color LaserJet CM1312nfi MFP'],Interfaces[5],InterfaceClass[255]
hp-setup[5493]: debug: No Smart Install Device found
hp-setup[5493]: debug: Probing bus: usb
error: No devices found on bus: usb