I'm trying to set up a Canon MP 420 Series printer on Ubuntu 11.10, but for some reason the wizard can't find the corresponding drivers. I looked for the drivers in , but they are not there. Even though the printer appears as installed and functioning, I cannot print with it form Ubuntu. Does anyone know how I can fix this? I'd really appreciate your help.
I'm assuming in this answer that you have made a typo - possibly you are asking for the MX420 series drivers or the MP240 drivers.
There is a PPA which you can install to add these drivers:
Then for the MX420:
For the MP240:
More information can be found on launchpad.