Re: Cups automatic duplex printing problems

Valentijn,

> On Jan 23, 2024, at 7:16=E2=80=AFAM, Valentijn Sessink =
<[email protected]> wrote:
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> Hi Michael, hi list,
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> As per your advice, I set up Cups debugging. I removed all printers, =
waited a while, saw the printers added to Cups:
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> I sent a duplex job - which printed non-duplex. Please find the debug =
logging entries of the print job below. I'm seeing =
"Duplex=3DDuplexNoTumble", but also "sides=3Done-sided".
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> Is the latter the problem? Or is that just coincidence? What can I do =
more to find the culprit?

So the "sides=3Done-sided" (IPP option) specifies a single-sided print =
while "Duplex=3DDuplexNoTumble" (PPD option) specifies a two-sided long =
edge print.

CUPS itself will give priority to the PPD option but I'm not sure what =
the backend will do with it (and I'm not familiar with the =
'implicitclass' backend, it isn't a standard part of CUPS.

________________________
Michael Sweet