When trying to print with a Canon iP2702 printer on Ubuntu 16.04 recently, every job was being created with a "Stopped" status. Nothing was printing and there were no error messages.
After investigating, I found the issue by expanding the job attributes for one job: (System Settings → Printer → View Print Queue → Right-click job → View Attributes)
job-printer-state-message: The PPD version (5.2.10-pre2) is not compatible with Gutenprint 5.2.11.
...which lead me to a thread that had a solution. In order to fix the issue, I had to run the following:
sudo /usr/sbin/cups-genppdupdate sudo service cups restart