Comment 2 for bug 1346868

lsusb:
Bus 001 Device 007: ID 04a9:1728 Canon, Inc. MX310 ser

$ ls -l /dev/usb/lp* /dev/bus/usb/*/*
crw-rw-r-- 1 root root 189, 0 Jul 21 19:49 /dev/bus/usb/001/001
crw-rw-r--+ 1 root lp 189, 6 Jul 21 19:49 /dev/bus/usb/001/007
crw-rw-r-- 1 root root 189, 128 Jul 21 19:49 /dev/bus/usb/002/001
crw-rw-r-- 1 root root 189, 132 Jul 21 19:49 /dev/bus/usb/002/005
crw-rw-r-- 1 root root 189, 256 Jul 21 19:49 /dev/bus/usb/003/001
crw-rw-r-- 1 root root 189, 384 Jul 21 19:49 /dev/bus/usb/004/001
crw-rw-r-- 1 root root 189, 512 Jul 21 19:49 /dev/bus/usb/005/001
crw-rw-r-- 1 root root 189, 513 Jul 21 19:49 /dev/bus/usb/005/002
crw-rw-r-- 1 root root 189, 514 Jul 21 19:49 /dev/bus/usb/005/003
crw-rw---- 1 root lp 180, 0 Jul 21 19:49 /dev/usb/lp0
crw-rw---- 1 root lp 180, 1 Jul 21 19:49 /dev/usb/lp1

$ sudo usb_printerid /dev/usb/lp0
GET_DEVICE_ID string:
MFG:Canon;CMD:BJL,BJRaster3,BSCCe,PLI;SOJ:TXT01;MDL:MX310 series;CLS:PRINTER;DES:Canon MX310 series;VER:1.040;STA:10;HRI:EU;MSI:E3;

$ sudo usb_printerid /dev/usb/lp1
GET_DEVICE_ID string:
MFG:Canon;CMD:MultiPASS 2.1;MDL:MX310 series FAX;CLS:PRINTER;DES:Canon MX310 series FAX;

$ lpinfo -v
network https
network http
network ipp
network ipps
network socket
network lpd
network ipp14
direct usb://Canon/MX310%20series?serial=470CDE&interface=1
direct usb://Canon/MX310%20series%20FAX?serial=470CDE&interface=2
direct hp
network smb
direct hpfax
$

Cups 1.7.2