The file is /etc/cups/cupsd.conf (d at the end) can you attach it's content together with a complete cups error log after trying to print duplex with debugging enabled as described here: https://wiki.ubuntu.com/DebuggingPrintingProblems. Can your follow the instructions of the sections "CUPS error_log", "Capturing print job data", and "Getting the data which would go to the printer". Can you also attach the file(s) which you tried to print? Please do this for all situations with problems (LibreOffice, evince, ...).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1390994 Title: Lost ability to print duplex To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1390994/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs