Xubuntu 12.04 no detection or list of printers

[Albert Wagner]

In Xubuntu 12.04 there is no detection of my printer, nor is there a 
list of printers to choose from when adding a printer.  It just requests 
a device URI, such as ipp://cups-server/printers/printer-queue.
This seems pretty primitive.  I suspect something needs to be done more 
useful than trying to find a URI for my printer: Epson WP-4020.
Xubuntu 11.10 had no problem detecting, finding the correct driver, and 
installing.  What can be done in 12.04?