I've just ran into this issue once again on a freshly installed Ubuntu. It exports QT_STYLE_OVERRIDE=gtk somewhere, and that makes e.g. Dropbox not work correctly.
-- 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/1695618 Title: Qt5 apps don’t pick up the GTK+ style anymore Status in qtbase-opensource-src package in Ubuntu: New Bug description: Since I upgraded to Qt 5.7.1, Qt5 apps stopped picking up the Ubuntu (GTK+, I presume) theme, and look very Windowsy. I have qt5-gtk- platformtheme installed, and I tried forcing it by setting QT_QPA_PLATFORMTHEME, but to no avail. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1695618/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp