OKULAR - can't set print default to duplex

[Amnon Yekutieli]

I filed this bug report with KDE:
https://bugs.kde.org/show_bug.cgi?id=395517

They suggested
"What you can try to do is open a bug against Ubuntu and ask whether they can backport the commit mentioned in comment 1 to the Qt version in Ubuntu 18.04... "

https://wiki.qt.io/Qt_5.12_Release
https://codereview.qt-project.org/#/c/226881/

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: okular 4:17.12.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Jun 19 11:57:15 2018
InstallationDate: Installed on 2018-06-15 (3 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: okular
UpgradeStatus: No upgrade log present (probably fresh install)

[Amnon Yekutieli (amyekut)]

Any progress? Let me mention the bug again:

As of the latest version:
  KUBUNTU 18.04
  OKULAR 1.3.3
that I installed a few says ago, OKULAR ignores the system-wide printer default "long side duplex", and offers "none" as the default.

This causes frequent wasteful printing!

[Amnon Yekutieli (amyekut)]

Nobody seems to want to do anything about this...

Is there a good alternative to send a pdf file to print, other than OKULAR?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Robert Bredereck (rbredereck)]

It should be linked/merged to this bug:
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1776173

[Robert Bredereck (rbredereck)]

There is a working backported patch fixing the bug linked here:
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1776173

I even set up a PPA where a patched version of qt is available.

Dear ubuntu maintainers, please include this patch into the official ubuntu packages so that everyone can profit. Also for environmental reasons (with this bug it is very likely that people waste paper) this should be done. The patch is very simple.