diff -ur kde-workspace-4.8.0/libs/kworkspace/CMakeLists.txt kde-workspace-4.8.0-systemd-shutdown/libs/kworkspace/CMakeLists.txt
--- kde-workspace-4.8.0/libs/kworkspace/CMakeLists.txt	2012-01-18 21:08:42.000000000 +0100
+++ kde-workspace-4.8.0-systemd-shutdown/libs/kworkspace/CMakeLists.txt	2012-03-01 07:19:09.000000000 +0100
@@ -36,6 +36,11 @@
 endif(SOPRANO_PLUGIN_RAPTORPARSER_FOUND AND SHAREDDESKTOPONTOLOGIES_ROOT_DIR)
 
 
+option(KWORKSPACE_USE_SYSTEMD "Use systemd instead of ConsoleKit in libkworkspace" OFF)
+if (KWORKSPACE_USE_SYSTEMD)
+    add_definitions(-DKWORKSPACE_USE_SYSTEMD=1)
+endif (KWORKSPACE_USE_SYSTEMD)
+
 
 set(ksmserver_xml  ${KDEBASE_WORKSPACE_SOURCE_DIR}/ksmserver/org.kde.KSMServerInterface.xml)
 qt4_add_dbus_interface( kworkspace_LIB_SRCS ${ksmserver_xml} ksmserver_interface )
diff -ur kde-workspace-4.8.0/libs/kworkspace/kdisplaymanager.cpp kde-workspace-4.8.0-systemd-shutdown/libs/kworkspace/kdisplaymanager.cpp
--- kde-workspace-4.8.0/libs/kworkspace/kdisplaymanager.cpp	2012-01-18 21:08:42.000000000 +0100
+++ kde-workspace-4.8.0-systemd-shutdown/libs/kworkspace/kdisplaymanager.cpp	2012-03-14 04:19:46.000000000 +0100
@@ -40,6 +40,91 @@
 #include <errno.h>
 #include <stdio.h>
 
+#ifdef KWORKSPACE_USE_SYSTEMD
+struct NamedDBusObjectPath
+{
+    QString name;
+    QDBusObjectPath path;
+};
+Q_DECLARE_METATYPE(NamedDBusObjectPath)
+Q_DECLARE_METATYPE(QList<NamedDBusObjectPath>)
+
+// Marshall the NamedDBusObjectPath data into a D-Bus argument
+QDBusArgument &operator<<(QDBusArgument &argument, const NamedDBusObjectPath &namedPath)
+{
+    argument.beginStructure();
+    argument << namedPath.name << namedPath.path;
+    argument.endStructure();
+    return argument;
+}
+
+// Retrieve the NamedDBusObjectPath data from the D-Bus argument
+const QDBusArgument &operator>>(const QDBusArgument &argument, NamedDBusObjectPath &namedPath)
+{
+    argument.beginStructure();
+    argument >> namedPath.name >> namedPath.path;
+    argument.endStructure();
+    return argument;
+}
+
+struct NumberedDBusObjectPath
+{
+    uint num;
+    QDBusObjectPath path;
+};
+Q_DECLARE_METATYPE(NumberedDBusObjectPath)
+
+// Marshall the NumberedDBusObjectPath data into a D-Bus argument
+QDBusArgument &operator<<(QDBusArgument &argument, const NumberedDBusObjectPath &numberedPath)
+{
+    argument.beginStructure();
+    argument << numberedPath.num << numberedPath.path;
+    argument.endStructure();
+    return argument;
+}
+
+// Retrieve the NumberedDBusObjectPath data from the D-Bus argument
+const QDBusArgument &operator>>(const QDBusArgument &argument, NumberedDBusObjectPath &numberedPath)
+{
+    argument.beginStructure();
+    argument >> numberedPath.num >> numberedPath.path;
+    argument.endStructure();
+    return argument;
+}
+
+class SystemdManager : public QDBusInterface
+{
+public:
+    SystemdManager() :
+        QDBusInterface(
+                QLatin1String("org.freedesktop.login1"),
+                QLatin1String("/org/freedesktop/login1"),
+                QLatin1String("org.freedesktop.login1.Manager"),
+                QDBusConnection::systemBus()) {}
+};
+
+class SystemdSeat : public QDBusInterface
+{
+public:
+    SystemdSeat(const QDBusObjectPath &path) :
+        QDBusInterface(
+                QLatin1String("org.freedesktop.login1"),
+                path.path(),
+                QLatin1String("org.freedesktop.login1.Seat"),
+                QDBusConnection::systemBus()) {}
+};
+
+class SystemdSession : public QDBusInterface
+{
+public:
+    SystemdSession(const QDBusObjectPath &path) :
+        QDBusInterface(
+                QLatin1String("org.freedesktop.login1"),
+                path.path(),
+                QLatin1String("org.freedesktop.login1.Session"),
+                QDBusConnection::systemBus()) {}
+};
+#else
 class CKManager : public QDBusInterface
 {
 public:
@@ -68,10 +153,11 @@
     CKSession(const QDBusObjectPath &path) :
         QDBusInterface(
                 QLatin1String("org.freedesktop.ConsoleKit"),
-            path.path(),
+                path.path(),
                 QLatin1String("org.freedesktop.ConsoleKit.Session"),
                 QDBusConnection::systemBus()) {}
 };
+#endif
 
 class GDMFactory : public QDBusInterface
 {
@@ -131,6 +217,11 @@
     }
     switch (DMType) {
     default:
+#ifdef KWORKSPACE_USE_SYSTEMD
+        qDBusRegisterMetaType<NamedDBusObjectPath>();
+        qDBusRegisterMetaType<QList<NamedDBusObjectPath> >();
+        qDBusRegisterMetaType<NumberedDBusObjectPath>();
+#endif
         return;
     case NewKDM:
     case OldGDM:
@@ -242,6 +333,23 @@
 
 static bool getCurrentSeat(QDBusObjectPath *currentSession, QDBusObjectPath *currentSeat)
 {
+#ifdef KWORKSPACE_USE_SYSTEMD
+    SystemdManager man;
+    QDBusReply<QDBusObjectPath> r = man.call(QLatin1String("GetSessionByPID"), (uint) QCoreApplication::applicationPid());
+    if (r.isValid()) {
+        SystemdSession sess(r.value());
+        if (sess.isValid()) {
+            QVariant p = sess.property("Seat");
+            if (p.canConvert<NamedDBusObjectPath>()) {
+                NamedDBusObjectPath namedPath = p.value<NamedDBusObjectPath>();
+                if (currentSession)
+                    *currentSession = r.value();
+                *currentSeat = namedPath.path;
+                return true;
+            }
+        }
+    }
+#else
     CKManager man;
     QDBusReply<QDBusObjectPath> r = man.call(QLatin1String("GetCurrentSession"));
     if (r.isValid()) {
@@ -256,11 +364,28 @@
             }
         }
     }
+#endif
     return false;
 }
 
 static QList<QDBusObjectPath> getSessionsForSeat(const QDBusObjectPath &path)
 {
+#ifdef KWORKSPACE_USE_SYSTEMD
+    SystemdSeat seat(path);
+    if (seat.isValid()) {
+        QVariant p = seat.property("Sessions");
+        if (p.canConvert<QList<NamedDBusObjectPath> >()) {
+            QList<NamedDBusObjectPath> r = p.value<QList<NamedDBusObjectPath> >();
+            QList<QDBusObjectPath> result;
+            foreach (const NamedDBusObjectPath &namedPath, r)
+                result.append(namedPath.path);
+            // This will contain only local sessions:
+            // - this is only ever called when isSwitchable() is true => local seat
+            // - remote logins into the machine are assigned to other seats
+            return result;
+        }
+    }
+#else
     CKSeat seat(path);
     if (seat.isValid()) {
         QDBusReply<QList<QDBusObjectPath> > r = seat.call(QLatin1String("GetSessions"));
@@ -271,9 +396,18 @@
             return r.value();
         }
     }
+#endif
     return QList<QDBusObjectPath>();
 }
 
+#ifdef KWORKSPACE_USE_SYSTEMD
+static void getSessionLocation(SystemdSession &lsess, SessEnt &se)
+{
+    se.tty = (lsess.property("Type").toString() != QLatin1String("x11"));
+    se.display = lsess.property(se.tty ? "TTY" : "Display").toString();
+    se.vt = lsess.property("VTNr").toInt();
+}
+#else
 static void getSessionLocation(CKSession &lsess, SessEnt &se)
 {
     QString tty;
@@ -291,14 +425,20 @@
     }
     se.vt = tty.mid(strlen("/dev/tty")).toInt();
 }
+#endif
 
 #ifndef KDM_NO_SHUTDOWN
 bool
 KDisplayManager::canShutdown()
 {
     if (DMType == NewGDM || DMType == NoDM || DMType == LightDM) {
+#ifdef KWORKSPACE_USE_SYSTEMD
+        QDBusReply<QString> canPowerOff = SystemdManager().call(QLatin1String("CanPowerOff"));
+        return (canPowerOff.isValid() && canPowerOff.value() != QLatin1String("no"));
+#else
         QDBusReply<bool> canStop = CKManager().call(QLatin1String("CanStop"));
         return (canStop.isValid() && canStop.value());
+#endif
     }
 
     if (DMType == OldKDM)
@@ -329,9 +469,21 @@
             return;
 
         if (DMType == NewGDM || DMType == NoDM || DMType == LightDM) {
+#ifdef KWORKSPACE_USE_SYSTEMD
+            // systemd supports only 2 modes:
+            // * interactive = true: brings up a PolicyKit prompt if other sessions are active
+            // * interactive = false: rejects the shutdown if other sessions are active
+            // There are no schedule or force modes.
+            // We try to map our 4 shutdown modes in the sanest way.
+            bool interactive = (shutdownMode == KWorkSpace::ShutdownModeInteractive
+                                || shutdownMode == KWorkSpace::ShutdownModeForceNow);
+            SystemdManager().call(QLatin1String(
+                    shutdownType == KWorkSpace::ShutdownTypeReboot ? "Reboot" : "PowerOff"), interactive);
+#else
             // FIXME: entirely ignoring shutdownMode
             CKManager().call(QLatin1String(
                     shutdownType == KWorkSpace::ShutdownTypeReboot ? "Restart" : "Stop"));
+#endif
             return;
         }
 
@@ -406,12 +558,18 @@
     if (DMType == NewGDM || DMType == LightDM) {
         QDBusObjectPath currentSeat;
         if (getCurrentSeat(0, &currentSeat)) {
+#ifdef KWORKSPACE_USE_SYSTEMD
+            SystemdSeat seat(currentSeat);
+            if (seat.isValid())
+                return seat.property("CanMultiSession").toBool();
+#else
             CKSeat seat(currentSeat);
             if (seat.isValid()) {
                 QDBusReply<bool> r = seat.call(QLatin1String("CanActivateSessions"));
                 if (r.isValid())
                     return r.value();
             }
+#endif
         }
         return false;
     }
@@ -469,6 +627,21 @@
         QDBusObjectPath currentSession, currentSeat;
         if (getCurrentSeat(&currentSession, &currentSeat)) {
             foreach (const QDBusObjectPath &sp, getSessionsForSeat(currentSeat)) {
+#ifdef KWORKSPACE_USE_SYSTEMD
+                SystemdSession lsess(sp);
+                if (lsess.isValid()) {
+                    SessEnt se;
+                    getSessionLocation(lsess, se);
+                    if (lsess.property("Class").toString() != QLatin1String("greeter")) {
+                        QVariant p = lsess.property("User");
+                        NumberedDBusObjectPath numberedPath = p.value<NumberedDBusObjectPath>();
+                        se.user = KUser(K_UID(numberedPath.num)).loginName();
+                        se.session = "<unknown>";
+                    }
+                    se.self = (sp == currentSession);
+                    list.append(se);
+                }
+#else
                 CKSession lsess(sp);
                 if (lsess.isValid()) {
                     SessEnt se;
@@ -484,6 +657,7 @@
                     se.self = (sp == currentSession);
                     list.append(se);
                 }
+#endif
             }
             return true;
         }
@@ -567,6 +741,21 @@
         QDBusObjectPath currentSeat;
         if (getCurrentSeat(0, &currentSeat)) {
             foreach (const QDBusObjectPath &sp, getSessionsForSeat(currentSeat)) {
+#ifdef KWORKSPACE_USE_SYSTEMD
+                SystemdSession lsess(sp);
+                if (lsess.isValid()) {
+                    SessEnt se;
+                    getSessionLocation(lsess, se);
+                    if (se.vt == vt) {
+#if 0
+                        if (se.tty) // FIXME: Does systemd ignore these like ConsoleKit does?
+                            return false;
+#endif
+                        lsess.call(QLatin1String("Activate"));
+                        return true;
+                    }
+                }
+#else
                 CKSession lsess(sp);
                 if (lsess.isValid()) {
                     SessEnt se;
@@ -578,6 +767,7 @@
                         return true;
                     }
                 }
+#endif
             }
         }
         return false;