I have been looking for a Driver for a Canon Pixma MG5520 all in one under Ubuntu 12.04. I have not found any in various searches. The michael-gruz PPA does not have it.
Canon claims: There is no driver for the OS Version you selected. The driver may be included in your OS or you may not need a driver.
My system does find the printer but mg 5500 series drivers don't show up in the install list. Am I just out of luck? (another mg5520 question does not look as if it was resolved ...)