w8@w8-FJ463AAR-ABA-a6528p:~$ sudo rmmod usblp
[sudo] password for w8: 
ERROR: Module usblp does not exist in /proc/modules
w8@w8-FJ463AAR-ABA-a6528p:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 067b:3507 Prolific Technology, Inc. PL3507 ATAPI6 Bridge
Bus 001 Device 004: ID 058f:6377 Alcor Micro Corp. Multimedia Card Reader
Bus 002 Device 002: ID 050d:0002 Belkin Components 
Bus 001 Device 005: ID 0951:1603 Kingston Technology DataTraveler 1GB/2GB Pen Drive
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ ls -l /dev/usb/lp*
ls: cannot access /dev/usb/lp*: No such file or directory
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ sudo /usr/lib/cups/backend/usb
DEBUG: list_devices
DEBUG: usb_find_busses=2
DEBUG: usb_find_devices=6
direct usb://Unknown/Printer "Unknown" "Unknown" "" ""
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ ldd /usr/lib/cups/backend/usb | grep usb
	libusb-0.1.so.4 => /lib/libusb-0.1.so.4 (0x0098b000)
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ lpinfo -v
network http
network lpd
network socket
direct scsi
network ipp
direct hp
direct usb://Unknown/Printer
network beh
network smb
direct hpfax
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ sudo modprobe usblp
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ lsmod | grep usb
usblp                  17833  0 
usb_storage            44173  5 
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ ls -l /dev/usb/lp*
crw-rw---- 1 root lp 180, 0 2012-01-21 11:31 /dev/usb/lp0
w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ for d in `ls -1 /dev/usb/lp*`; do sudo usb_printerid $d; done
GET_DEVICE_ID string:

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w8@w8-FJ463AAR-ABA-a6528p:~$ 
w8@w8-FJ463AAR-ABA-a6528p:~$ sudo rmmod usblp
w8@w8-FJ463AAR-ABA-a6528p:~$