diff --git a/src/backendlauncher/main.cpp b/src/backendlauncher/main.cpp
--- a/src/backendlauncher/main.cpp
+++ b/src/backendlauncher/main.cpp
@@ -19,6 +19,7 @@
 
 #include <QGuiApplication>
 #include <QDBusConnection>
+#include <QSessionManager>
 
 #include "kscreen_backendLauncher_debug.h"
 #include "backendloader.h"
@@ -30,6 +31,12 @@
     QGuiApplication::setDesktopSettingsAware(false);
     QGuiApplication app(argc, argv);
 
+    auto disableSessionManagement = [](QSessionManager &sm) {
+        sm.setRestartHint(QSessionManager::RestartNever);
+    };
+    QObject::connect(&app, &QGuiApplication::commitDataRequest, disableSessionManagement);
+    QObject::connect(&app, &QGuiApplication::saveStateRequest, disableSessionManagement);
+
     if (!QDBusConnection::sessionBus().registerService(QStringLiteral("org.kde.KScreen"))) {
         qCWarning(KSCREEN_BACKEND_LAUNCHER) << "Cannot register org.kde.KScreen service. Another launcher already running?";
         return -1;