The possible workaround is unsetting `QT_QPA_PLATFORMTHEME` in ~/.profile file. A workaround is described in this askUbuntu answer written by me http://askubuntu.com/a/817066/61218
You put these in ~/.profile ## Fixing QT style override problem if [ "x$XDG_SESSION_DESKTOP" == "xKDE" ]; then unset QT_STYLE_OVERRIDE unset QT_QPA_PLATFORMTHEME fi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1434516 Title: KDE Applications Use Oxygen Widget style eventhough Breeze is selected (Plasma 5) To manage notifications about this bug go to: https://bugs.launchpad.net/appmenu-qt5/+bug/1434516/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs