Public bug reported:

Please backport Qt patch 213391 to qtbase-opensource-src in Bionic:
https://codereview.qt-project.org/#/c/213391/


[Impact]
On Kubuntu 18.04 (bionic), any applications using Qt5 are unable to fully 
configure printers from within the "Print..." dialog because the "Advanced" tab 
is no longer present.  Settings shown here will differ by printer, but this 
includes important settings such as paper type (plain, glossy, photo, etc.), 
print resolution, and ink usage strategies.  Gwenview and Okular are notable 
affected applications.  GTK applications are unaffected and do show the 
advanced options provided by the printer driver.  As a workaround for Qt5 
applications, the printer *default* advanced settings can be successfully 
accessed and changed from within the "Printers" section of Plasma's "System 
Settings", but this is cumbersome, unintuitive, and is not the intended way of 
interacting with these settings on a per-print-job basis.


[Additional Information]
This was identified as a bug in Qt5 upstream:
https://bugreports.qt.io/browse/QTBUG-54464

The bug was fixed upstream in Qt 5.11, but Bionic is stable on Qt 5.9.
I'd like to request that this patch be backported to Bionic, please.


[Regression Potential]
OpenSUSE has already backported this patch to their Qt 5.9 stable branch, so 
there is precedent for this patch being low risk:
https://build.opensuse.org/package/view_file/KDE:Qt:5.9/libqt5-qtbase/0010-Reintroduce-the-Advanced-tab-in-the-QPrintProperties.patch?expand=1


Software Versions:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.3 LTS
Release:        18.04
Codename:       bionic

$ apt-cache policy libqt5printsupport5
libqt5printsupport5:
  Installed: 5.9.5+dfsg-0ubuntu2.4
  Candidate: 5.9.5+dfsg-0ubuntu2.4
  Version table:
 *** 5.9.5+dfsg-0ubuntu2.4 500
        500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
        100 /var/lib/dpkg/status
     5.9.5+dfsg-0ubuntu2.1 500
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 
Packages
     5.9.5+dfsg-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

** Affects: qtbase-opensource-src (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1858141

Title:
  "Advanced" tab is missing from Print dialog in Qt5 applications

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