I've have now played around a bit and backported the patch mentioned in my last comment. It seems to work fine. You may want to test it installing "libqt5printsupport5" from my ppa: https://launchpad.net/~rbredereck/+archive/ubuntu/qtbase-opensource-src-duplexpatch
I've have now played around a bit and backported the patch mentioned in my last comment. It seems to work fine. You may want to test it installing "libqt5printsup port5" from my ppa: https:/ /launchpad. net/~rbredereck /+archive/ ubuntu/ qtbase- opensource- src-duplexpatch