Could you please attach the PPD files of your printer, once of a Ubuntu
version in which the duplex works correctly (19.04 for example) and once
for a Ubuntu version where duplex printing does not work correctly
(19.10 for example). Could you also supply a CUPS error_log for one
working job (from 19.04 for example) and one non-working job (from 19.10
for example). Follow the instructions of the section "CUPS error_log" on
https://wiki.ubuntu.com/DebuggingPrintingProblems.
Also run the command
driverless
to get your printer's IPP URI and then run
ipptool -tv <IPP URI> get-printer-attributes-2.0.test > attrs.txt
If attrs.txt contains only a few lines or is empty, run
ipptool -tv <IPP URI> get-printer-attributes.test > attrs.txt
This you only need to do on 19.10, not on both systems.
Please attach your PPDs, error_logs, and attrs.txt, one by one. Do not
compress them and do not package them together.
** Changed in: cups (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1853879
Title:
Dell E310dw: Default driver doesn't work, driverless fails on sides
=two-sided-long-edge
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