Comment 17 for bug 1806352

After a lot of wrong trying, I worsen the problem. So I reinstall Ubuntu again. This time I followed instructions from:
https://wiki.ubuntu.com/DebuggingPrintingProblems
and I typed the command
tail -f /var/log/syslog
From the screen report, I saw missing of systray and plugin. I concluded that systray is not essential so didn't install it at all. I just put the:
sudo hp-plugin -i

After that printer worked fine.
Conclusion. Brian you were right this was the bug 1807051.

Thanks