Comment 7 for bug 878794

ass@ass-GA-790XT-USB3:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 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 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 004: ID 04a5:7008 Acer Peripherals Inc. (now BenQ Corp.)
Bus 003 Device 003: ID 1bcf:0002 Sunplus Innovation Technology Inc.
Bus 004 Device 002: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel Port
ass@ass-GA-790XT-USB3:~$ ls -l /dev/bus/usb/*/*
crw-rw-r-- 1 root root 189, 0 2012-01-15 18:09 /dev/bus/usb/001/001
crw-rw-r-- 1 root root 189, 128 2012-01-15 18:09 /dev/bus/usb/002/001
crw-rw-r-- 1 root root 189, 256 2012-01-15 18:09 /dev/bus/usb/003/001
crw-rw-r-- 1 root root 189, 258 2012-01-16 03:17 /dev/bus/usb/003/003
crw-rw-r-- 1 root root 189, 384 2012-01-15 18:09 /dev/bus/usb/004/001
crw-rw-r-- 1 root lp 189, 385 2012-01-16 07:30 /dev/bus/usb/004/002
crw-rw-r-- 1 root root 189, 512 2012-01-15 18:09 /dev/bus/usb/005/001
crw-rw-r-- 1 root root 189, 640 2012-01-15 18:09 /dev/bus/usb/006/001
crw-rw-r-- 1 root root 189, 643 2012-01-16 03:17 /dev/bus/usb/006/004
crw-rw-r-- 1 root root 189, 768 2012-01-15 18:09 /dev/bus/usb/007/001
crw-rw-r-- 1 root root 189, 896 2012-01-15 18:09 /dev/bus/usb/008/001
crw-rw-r-- 1 root root 189, 1024 2012-01-15 18:09 /dev/bus/usb/009/001
ass@ass-GA-790XT-USB3:~$ ls -l /dev/usb/lp*
ls: Zugriff auf /dev/usb/lp* nicht möglich: Datei oder Verzeichnis nicht gefunden
ass@ass-GA-790XT-USB3:~$ sudo /usr/lib/cups/backend/usb
[sudo] password for ass:
DEBUG: list_devices
DEBUG: libusb_get_device_list=12
ass@ass-GA-790XT-USB3:~$ ldd /usr/lib/cups/backend/usb | grep usb
        libusb-1.0.so.0 => /lib/x86_64-linux-gnu/libusb-1.0.so.0 (0x00007fcb2ef8a000)
ass@ass-GA-790XT-USB3:~$ lpinfo -v
network socket
serial serial:/dev/ttyS0?baud=115200
network ipp
network http
network lpd
network smb
network beh
direct hp
direct hpfax
ass@ass-GA-790XT-USB3:~$