Can't use network printer via samba, how to debug the problem?

Maybe it will be helpful for someone.

I encountered the same problem on Ubuntu 14.04. Steps below solved it for me:

• remove printer added via System Settings->Printers
• open localhost:631 in the browser
• go to Administration tab, click Add Printer button and follow the instructions

I don't know why, but only after adding printer in such way it works for me and for my colleagues.

I solved this by modifying the printer Device URI to include the username and password, in the format:

smb://username:[email protected]/printer

(to change this, go to System settings > Printers, then right-click on the printer icon)