(In reply to Wolfgang Bauer from comment #9) > Maybe quassel would just need to disable Qt's fallback session management, > that closes the window automatically on logout. > > I.e. call QGuiApplication::setFallbackSessionManagementEnabled(false) on > start. > > See > https://doc.qt.io/qt-5/qguiapplication. > html#isFallbackSessionManagementEnabled It already does: https://github.com/quassel/quassel/blob/93f36a585e19397a4c68734b45ea59798d1f2ed1/src/qtui/qtuiapplication.cpp#L37