(Note: steps 1-3 may not be completely necessary, but I did them anyway in the interest documenting a path to resolution)Ĥ) From there, I accessed CUPS through: (Note: after logging in I noticed the same thing that you did - that the printer wasn't listed at all)ĥ) From here I proceeded to Add a new printer directly through the CUPS admin page I also noticed the CUPS errors when attempting to add the printer generically through settings, and after researching CUPS errors here is what I did that resolved the issue:ġ) Removed the printer through the interfaceĢ) Shut down the printer completely and re-connected it to the WIFI network.ģ) Added the printer back selecting the driverless option through the Add Printer interface It seems to be related to an error between adding a printer directly through CUPS vs. I was having the same issue after upgrading to 18.04 and was finally able to resolve it. The error log, accessible in the localhost CUPS page, shows this:Į Unable to create PPD file: Printer does not support required IPP attributes or document formats.Į copy_model: empty PPD fileĮ Returning IPP server-error-internal-error for CUPS-Add-Modify-Printer (ipp://localhost/printers/Canon-MX920-series) from localhost It's odd that the CUPS localhost page doesn't see the printer but the Ubuntu printers settings does. And when I choose the "Find new printers" option under the Administration page, it says that no printers are found. On the CUPS printer list page ( ) the printer is not listed. I tried removing the printer, but it gets added automatically by the OS. I can select it as a target printer in Chrome and print to it, but nothing happens. The printer is automatically detected by the OS, but it shows "Does not accept jobs" as show below.However, I can't print to it from my new Ubuntu 18.04 computer. Its on my home wifi, and other Macbook computers on the network can access it.