Did you "
discover" your printer using the printer control panel under administration? (I use Mint 18 so I'm assuming that Ubuntu has similar admin controls.)
If I try to add a printer using the control panel app I get a "
network" section I can expand where I find my HP Photosmart printer. (it shows it's connected to localhost too.)
If your Canon isn't there, there's a "
Find network printer" choice which would search your network and hopefully, er... find it.
If you're still having problems can you tell us what your downloaded drivers were and what you did to install them. Are they for Linux or Windows?
Giving us a step by step description of what you did can help in getting a quick resolution.
Play Bonny!
