It is not a bug. We intentionally disable debug output in Debian/Ubuntu (Fedora also does the same thing). It was done in order to solve https://bugs.debian.org/805399.
There are easy workarounds: either what you suggested, or exporting QT_LOGGING_RULES="*.debug=true". ** Bug watch added: Debian Bug tracker #805399 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=805399 ** Changed in: qtbase-opensource-src (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qtbase-opensource-src in Ubuntu. https://bugs.launchpad.net/bugs/1731646 Title: missing qDebug output when creating QT applications Status in qtbase-opensource-src package in Ubuntu: Invalid Bug description: This bug seems to be connected to: https://bugzilla.redhat.com/show_bug.cgi?id=1227295 in the above link I have found a workaround for the problem. I have created an empty file in: ~/.config/QtProject called qtlogging.ini and the problem is resolved. the problem was not present in ubuntu 17.04 ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: libqt5core5a 5.9.1+dfsg-10ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 CurrentDesktop: KDE Date: Sat Nov 11 16:59:49 2017 InstallationDate: Installed on 2016-11-09 (366 days ago) InstallationMedia: Kubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1) SourcePackage: qtbase-opensource-src UpgradeStatus: Upgraded to artful on 2017-10-30 (11 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1731646/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
