What you describe sounds like an effect of switching from X11 to Wayland, not a regression in Qt.
In X11, the window decorations can be drawn either by the window manager or by the application itself. Qt relied on window manager, so the decorations looked uniform. In Wayland, there is no choice, and Qt draws its own window decorations, which may be different from GNOME ones. If you signed into a Wayland session in Ubuntu 22.04, you would likely get the same effect. There is a third-party package which may make things better for Qt applications in GNOME: qgnomeplatform-qt5. After installing it, try running your application with QT_QPA_PLATFORMTHEME=gnome environment variable. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2063332 Title: Multiple problems Ubuntu 24.04 with Qt5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/2063332/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
