[Solved]Problem printing with Canon UFR-II printer and CUPS

[tempUser2015]

This issue is related to being unable to print with a Canon network printer. I can't remember my username since I seldom post and the forum doesn't allow password reset via email only so pardon my polluting the forum database with a throwaway user/email.

I'd solved this issue while hoping for a reply on the lists but decided to post here for the sake of others as I couldn't find a solution on the web previously and the cause/solution would probably be applicable to plenty of other printers. It is not really hardware/system specific so I'm leaving out the unnecessary details.

The situation/symptoms.
- Printer can be added to CUPS, it is network accessible, the webGUI works and responds to pings but printing does not appear to work.
- System is up to date with latest drivers from manufacturer
- There are usually no error messages, the print job just stays in the queue forever.
- There is a process c3pldrv that uses 100% cpu cycles.

The cause: SELinux

Solution
- disable SELinux or set it to permissive
- Or use the setools to generate a set of policies from the audit log to allow the printer driver to be able to create/read/write some CUPS temporary file.