I had previously created this question + answer, but that would not work for me after a while.I am looking for an alternative. 
How to make the printer Canon Laser Shot LBP-1120 work in Elementary OS Luna (Ubuntu 12.04 TLS) - 32-bit version?
drivers;cups;elementary os
As eOS Luna is based on Ubuntu 12.04 LTS, I have followed the method presented here (most below is just a translation from French).So, download 2.6 driver from here and install the deb files.Then, run these commands:sudo /usr/sbin/lpadmin -p LBP1120 -m CNCUPSLBP1120CAPTK.ppd -v  ccp://localhost:59787 -Esudo /usr/sbin/ccpdadmin -p LBP1120 -o /dev/usb/lp0sudo service ccpd startsudo service ccpd statusYou should get two numbers.If you do not get two numbers:-edit with administrative rights /etc/ccpd.conf(gedit text editor in this case)sudo gedit /etc/ccpd.confand add this:<Printer LBP1120>DevicePath / dev/usb/lp0</ Printer>Then restart the daemon and check the status:sudo service ccpd restartsudo service ccpd statusrestart and try againFinally set the system so that the demon ccpd starts correctly when turning on the printer; this requires two conditions: that the ccpd is started or restarted at each operation of the printer, and that the CUPS service is active when starting ccpd.Start or restart ccpd with the printer; this can be automated using udev:Open or create with administrative rights the file: /etc/udev/rules.d/85-canon-capt.rules sudo gedit /etc/udev/rules.d/85-canon-capt.rulesand add these lines:KERNEL==lp*, SUBSYSTEMS==usb, ACTION==add, ATTRS{idVendor}==04a9, RUN+=/etc/init.d/ccpd startKERNEL==lp*, SUBSYSTEMS==usb, ACTION==remove, RUN+=/etc/init.d/ccpd stopFinish by saving the file.UDEV automatically detect this new rule, it is not necessary to restart.If you used the automated installation using a BASH script (or you had already automated at startup as indicated in my askubuntu answer linked above), the ccpd daemon will not take into account the two above conditions, it is simply launched every time with the PC.It is therefore necessary to cancel this systematic action so that it would not interfere with the new udev rule.Type the following command in a terminal:sudo update-rc.d-f remove ccpdAutomatic detection of printers defined in the file system /lib/udev/rules.d/70-printers.rules may come against the udev rule you just created.Open with administrative rights the file: /lib/udev/rules.d/70-printers.rules sudo gedit /lib/udev/rules.d/70-printers.rulesand comment all lines:# Low-level USB device add trigger#ACTION==add, SUBSYSTEM==usb, ATTR{bInterfaceClass}==07, ATTR{bInterfaceSubClass}==01, TAG+=udev-configure-printer, RUN+=udev-configure-printer add %p# usblp device add trigger (needed when usblp is already loaded)#ACTION==add, KERNEL==lp*, TAG+=udev-configure-printer, RUN+=udev-configure-printer add %p# Low-level USB device remove trigger#ACTION==remove, SUBSYSTEM==usb, ENV{ID_USB_INTERFACES}==*:0701*:*, RUN+=udev-configure-printer remove %pIf the ccpd daemon is running before CUPS at the first print request it will be stuck with no error message. It will may then take 100 % of the CPU and may need to be stopped by kill -9 or by going to console - ctrl-alt-f1 - and force logout: after user name and password: pkill -KILL -u *username*.This situation can occur if the printer is on and connected before the PC is started (the sequence of Ubuntu boot UDEV starts before CUPS. So UDEV rule we just created will detect the printer and launch ccpd before CUPS) or in the case of an update of CUPS : the service is stopped and then restarted while ccpd remains active.To overcome these specific problems you need to generate an Upstart job, in addition to the UDEV rule created earlier. It will restart ccpd to ensure correct operation when the printer is detected on the USB bus.Create with administrative rights the file: /etc/init/ccpd-restart.conf sudo gedit /etc/init/ccpd-restart.confand insert this:# ccpd-restart - Relance ccpd si l'imprimante est allume avant le PC.description    restart daemon ccpd for Canon printer LBP-seriestart on started cupsstop on runlevel [016]script    if [ -e /dev/usb/lp* ]; then                /etc/init.d/ccpd stop        sleep 5        /etc/init.d/ccpd start    fiend scriptSave and close.Restart computer.Solutions to problems:If just 2 numbers after service ccpd status - restart cups: sudo service ccpd restart. Possibly logout or restart.If the 2 numbers are there but it will not print (the print job is in the print queue):check under Printing, right click the printer and 'View print queue', select the job, right click and click 'Release' if activerun captstatusui -P LBP1120 and check 'Resume job' if activerestart the printer from its power buttonpossibly restart the computer  try with printer connected and then disconnected.