w8@w8-Aspire-5000:~$ sudo rmmod usblp
[sudo] password for w8: 
ERROR: Module usblp does not exist in /proc/modules
w8@w8-Aspire-5000:~$ 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 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 050d:0002 Belkin Components 
Bus 003 Device 002: ID 0461:4d16 Primax Electronics, Ltd 
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ ls -l /dev/bus/usb/*/*
crw-rw-r-- 1 root root 189,   0 2012-01-21 11:55 /dev/bus/usb/001/001
crw-rw-r-- 1 root root 189, 128 2012-01-21 11:55 /dev/bus/usb/002/001
crw-rw-r-- 1 root lp   189, 129 2012-01-21 12:45 /dev/bus/usb/002/002
crw-rw-r-- 1 root root 189, 256 2012-01-21 11:55 /dev/bus/usb/003/001
crw-rw-r-- 1 root root 189, 257 2012-01-21 12:46 /dev/bus/usb/003/002
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ ls -l /dev/usb/lp*
ls: cannot access /dev/usb/lp*: No such file or directory
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ sudo /usr/lib/cups/backend/usb
DEBUG: list_devices
DEBUG: usb_find_busses=3
DEBUG: usb_find_devices=5
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ ldd /usr/lib/cups/backend/usb | grep usb
	libusb-0.1.so.4 => /lib/libusb-0.1.so.4 (0x001cf000)
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ lpinfo -v
direct scsi
network http
network ipp
network socket
network lpd
network beh
network smb
direct parallel:/dev/lp0
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ sudo modprobe usblp
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ lsmod | grep usb
usblp                  17833  0 
usb_storage            44173  0 
usbhid                 41905  0 
hid                    77367  1 usbhid
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ ls -l /dev/usb/lp*
ls: cannot access /dev/usb/lp*: No such file or directory
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ for d in `ls -1 /dev/usb/lp*`; do sudo usb_printerid $d; done
ls: cannot access /dev/usb/lp*: No such file or directory
w8@w8-Aspire-5000:~$ 
w8@w8-Aspire-5000:~$ sudo rmmod usblp