On both Mac and Windows when I print a document there is an advanced screen that allows me to select an option called Simulate Overprinting, however such an option doesn't appear on the Ubuntu version.

Wikipedia on overprinting:

Overprinting refers to the process of printing one colour on top of another in reprographics. This is closely linked to the reprographic technique of 'trapping'. Another use of overprinting is to create a rich black (often regarded as a colour that is "blacker than black") by printing black over another dark colour.

This is an issue for us, as we're trying to print documents that need flattening (this is what overprinting does).

Am I missing something here, is there a way to enable overprinting on printed PDFs?

Note: Please don't confuse simulate overprinting with overprint preview, of which doesn't apply when printing.

Just to show you what I'm looking for, this is the Print > Advanced screen...

And this is what I see on the Ubuntu screen, not no option for overprinting