Thanks for the reply. I am on Ubuntu Linux. I had added my printer, but for some reason Darktable didn't like the way it was added. I added it again and Darktable's print dialog works for me, now.
I have a number of print jobs that I need to do, that will fix the same profile: A4 paper, landscape, two image areas to a page. I figured out how to set up one print job the way I want it, but I'm wondering if there's a way to save my print settings so I can load them up this way, by default.
Is it possible? I'm getting the idea, from the comments on this forum, that Darktable's print functionality is still pretty new.