Chris, Till, thanks for putting me on track.

I get the picture more clearly now. Although, I am a bit in the dark how
the CIDFonts turn up. To my understanding the PDF produced for printing
can't contain CIDFonts, since (as Chris explained) they are an exclusive
PostScript construct. So, it must be the `ps2write` filter creating
PostScript level 3 ad-hoc that introduces the CIDFonts along the way. Am
I right about that?

Till, the workaround for PDF printing you propose is perfectly valid of
course, were it not that I am developing a cups-pdf like solution
myself, and I am looking for a way to get the PDF, meant for printing,
streamed directly into my CUPS backend.

How can I prevent conversion of the PDF print stream to PostScript? As
you applied a patch to cups-pdf to make it accept PDF as input, can you
please give me some pointers?

(Should I use a special PPD format for that? My CUPS backend is
currently tied to a printer configured with the ghostpdf.ppd)

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https://bugs.launchpad.net/bugs/942866

Title:
  Ubuntu 11.10: printing to PDF produces unsearchable PDF (contrary to
  10.04)

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