Printer prints a test page but nothing from Apps

[Guy Shelemy]

I installed Kubuntu 18.04 and everything works nicely. I tested my printer and it printed off the test page. But I can't print anything from Apps. I see the page sitting in the printer que and it says it printed but nothing came out of the printer.
I read somewhere that this new release is buggy for printers. Any solutions?

[GreyGeek]

My crystal ball is broken. I can't see what the make and model of your printer is, what driver you are using, and if you've set that printer as the default.

[Guy Shelemy]

I have a Samsung ML-2165 B&W laser printer. The Kubuntu printer driver is for the ML-2165. The document goes to the print que and says printed.
Everything works fine on Ubuntu Studio. I think the problem is somewhere between the Apps and the Cups. I'm not sure how to troubleshoot however.

[GreyGeek]

What does /var/log/cups/error_log have in it?

If nothing if interest then in the printer dialog go to 'Image Quality' tab, or click on 'Properties' then go to 'Image Quality' tab and try different resolutions then click 'Print'. See which resolution, if any, prints.



If nothing prints then try deactivating the AppArmor protection with
sudo aa-complain cupsd.
If this helps, look for messages containing audit in the /var/log/syslog file. These show which components are accessed by the printing system for which there is no explicit permission given in /etc/apparmor.d/usr.sbin.cupsd. You can re-activate AppArmor via
sudo aa-enforce cupsd.

The following site has some excellent trouble shooting tips, which is where I got the one above: https://wiki.ubuntu.com/DebuggingPrintingProblems