denny@serenity ~ $ lsmod | grep usb
snd_usb_audio         153617  1 
snd_usbmidi_lib        29215  1 snd_usb_audio
snd_hwdep              13602  2 snd_usb_audio,snd_hda_codec
snd_pcm               102099  4 snd_usb_audio,snd_hda_codec,snd_hda_intel
snd_rawmidi            30144  2 snd_usbmidi_lib,snd_seq_midi
usblp                  22891  0 
snd                    69322  23 snd_hda_codec_realtek,snd_usb_audio,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
usbhid                 52659  0 
hid                   106148  3 hid_generic,hid_logitech,usbhid

denny@serenity ~ $ tail -f -n 0 /var/log/syslog    # and plug printer USB cable back in
Nov 25 23:01:23 serenity kernel: [463597.166540] usb 5-2: new full-speed USB device number 3 using uhci_hcd
Nov 25 23:01:23 serenity kernel: [463597.350603] usb 5-2: New USB device found, idVendor=043d, idProduct=00cc
Nov 25 23:01:23 serenity kernel: [463597.350606] usb 5-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov 25 23:01:23 serenity kernel: [463597.350608] usb 5-2: Product: Lexmark E120n
Nov 25 23:01:23 serenity kernel: [463597.350610] usb 5-2: Manufacturer: Lexmark International
Nov 25 23:01:23 serenity kernel: [463597.350612] usb 5-2: SerialNumber: 995CMR1
Nov 25 23:01:23 serenity mtp-probe: checking bus 5, device 3: "/sys/devices/pci0000:00/0000:00:1a.2/usb5/5-2"
Nov 25 23:01:23 serenity mtp-probe: bus: 5, device: 3 was not an MTP device
Nov 25 23:01:23 serenity kernel: [463597.355805] usblp 5-2:1.0: usblp2: USB Bidirectional printer dev 3 if 0 alt 0 proto 2 vid 0x043D pid 0x00CC
Nov 25 23:01:23 serenity udev-configure-printer: add /devices/pci0000:00/0000:00:1a.2/usb5/5-2/5-2:1.0
Nov 25 23:01:23 serenity udev-configure-printer: device devpath is /devices/pci0000:00/0000:00:1a.2/usb5/5-2/5-2:1.0
Nov 25 23:01:23 serenity udev-configure-printer: MFG:Lexmark International MDL:Lexmark E120n SERN:- serial:-
Nov 25 23:01:24 serenity kernel: [463598.382845] usblp2: removed
Nov 25 23:01:24 serenity kernel: [463598.393461] usblp 5-2:1.0: usblp2: USB Bidirectional printer dev 3 if 0 alt 0 proto 2 vid 0x043D pid 0x00CC
Nov 25 23:01:24 serenity udev-configure-printer: URI matches without serial number: usb://Lexmark/E120n?serial=995CMR1
Nov 25 23:01:24 serenity udev-configure-printer: No serial number URI matches so using those without
Nov 25 23:01:24 serenity udev-configure-printer: URI of detected printer: usb://Lexmark/E120n?serial=995CMR1, normalized: lexmark e120n serial 995cmr1
Nov 25 23:01:24 serenity udev-configure-printer: URI of print queue: usb://Lexmark/E120n?serial=995CMR1, normalized: lexmark e120n serial 995cmr1
Nov 25 23:01:24 serenity udev-configure-printer: Queue ipp://localhost:631/printers/Lexmark-E120n has matching device URI

denny@serenity ~ $ lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 003: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser
Bus 007 Device 002: ID 046d:c50e Logitech, Inc. Cordless Mouse Receiver
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 001 Device 003: ID 046d:082d Logitech, Inc. HD Pro Webcam C920
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 003: ID 043d:00cc Lexmark International, Inc. E120(n)
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 062a:4102 Creative Labs 
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
Bus 009 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 010 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

denny@serenity ~ $ ls -l /dev/usb/lp* /dev/bus/usb/*/*
crw-rw-r-- 1 root root 189,    0 Nov 20 14:12 /dev/bus/usb/001/001
crw-rw-r-- 1 root root 189,    2 Nov 20 14:12 /dev/bus/usb/001/003
crw-rw-r-- 1 root root 189,  128 Nov 20 14:12 /dev/bus/usb/002/001
crw-rw-r-- 1 root root 189,  256 Nov 20 14:12 /dev/bus/usb/003/001
crw-rw-r-- 1 root root 189,  384 Nov 20 14:12 /dev/bus/usb/004/001
crw-rw-r-- 1 root root 189,  385 Nov 20 14:12 /dev/bus/usb/004/002
crw-rw-r-- 1 root root 189,  512 Nov 20 14:12 /dev/bus/usb/005/001
crw-rw-r-- 1 root lp   189,  514 Nov 25 23:01 /dev/bus/usb/005/003
crw-rw-r-- 1 root root 189,  640 Nov 20 14:12 /dev/bus/usb/006/001
crw-rw-r-- 1 root root 189,  768 Nov 20 14:12 /dev/bus/usb/007/001
crw-rw-r-- 1 root root 189,  769 Nov 25 23:03 /dev/bus/usb/007/002
crw-rw-r-- 1 root root 189,  770 Nov 20 14:12 /dev/bus/usb/007/003
crw-rw-r-- 1 root root 189,  896 Nov 20 14:12 /dev/bus/usb/008/001
crw-rw-r-- 1 root root 189, 1024 Nov 20 14:12 /dev/bus/usb/009/001
crw-rw-r-- 1 root root 189, 1152 Nov 20 14:12 /dev/bus/usb/010/001
crw-rw---- 1 root lp   180,    2 Nov 25 23:01 /dev/usb/lp2

denny@serenity ~ $ sudo usb_printerid /dev/usb/lp2
GET_DEVICE_ID string:
MANUFACTURER:Lexmark International;COMMAND SET:PCL 6 Emulation, PostScript Level 3 For Mac Emulation, NPAP, PJL;MODEL:Lexmark E120n;CLS:PRINTER;DES:Lexmark E120n;CID:Lexmark_InternationaC99C, Lexmark_InternationaCC02, Lexmark_Internationa0D83;COMMENT:ECP1.0, LV_043D, LP_00CC, LF_003F;

denny@serenity ~ $ lpinfo -v
network ipp14
network http
network lpd
network ipp
network socket
network https
direct hp
network smb
network ipps
direct usb://Lexmark/E120n?serial=995CMR1
direct hpfax


I believe the command I entered to get it working was:
lpadmin -p Lexmark-E120n -o usb-no-reattach-default=true


Hope that helps!