Just installed 18.04, my wireless printer appears in Settings > Devices > Printers but doesn't connect/print.
I have therefore downloaded the printer driver from the manufacturer, Pantum, and installed it, this has created a new printer in the list which works.
Now I want to remove the non working one, I can delete it but then if I return to the page it is back.
I have followed these instructions: Cannot remove printer cups adds it back with no result. In CUPS I only have one printer (the working one).
Never had these issues with 16.04 and missing Unity already...