Qt Wayland

Display server

To utilize Wayland for Qt-based applications install the qt5-wayland and qt6-wayland packages. Optionally, also install qt5ct and qt6ct if you're on a non-KDE desktop environment.

Then set the QT_QPA_PLATFORM environment variable to:

• wayland for the wayland plugin
• xcb for the X11 plugin
• qt6ct for running Qt6-based applications on non-KDE desktop environments
• qt5ct for running Qt5-based applications on non-KDE desktop environments

TIP: It may prove useful to set multiple values separated by ;. In case one is not available, the next one is used.

QT_QPA_PLATFORM="wayland;qt5ct;xcb"

Use KDE dialogs

If some applications (e.g. Telegram) don't use default KDE dialogs, set the following environment variable:

QT_QPA_PLATFORMTHEME="flatpak"