diff --git a/tdecore/tdehw/tderootsystemdevice.cpp b/tdecore/tdehw/tderootsystemdevice.cpp
index 92c95fcc2..a57a1c5d3 100644
--- a/tdecore/tdehw/tderootsystemdevice.cpp
+++ b/tdecore/tdehw/tderootsystemdevice.cpp
@@ -599,29 +599,26 @@ bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState
 
 #ifdef WITH_LOGINDPOWER
 		{
+			// No support for "freeze" and "standby" in org.freedesktop.login1
 			TQT_DBusConnection dbusConn;
 			dbusConn = TQT_DBusConnection::addConnection(TQT_DBusConnection::SystemBus);
 			if ( dbusConn.isConnected() ) {
-				if (ps == TDESystemPowerState::Suspend) {
-					TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
-								"org.freedesktop.login1",
-								"/org/freedesktop/login1",
-								"org.freedesktop.login1.Manager",
-								"Suspend");
-					TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
-					if (reply.type() == TQT_DBusMessage::ReplyMessage) {
-						return true;
+				TQT_DBusProxy logindProxy("org.freedesktop.login1", "/org/freedesktop/login1",
+				                          "org.freedesktop.login1.Manager", dbusConn);
+				TQValueList<TQT_DBusData> params;
+				params << TQT_DBusData::fromBool(true);
+				if (logindProxy.canSend()) {
+					if (ps == TDESystemPowerState::Suspend) {
+						TQT_DBusMessage reply = logindProxy.sendWithReply("Suspend", params);
+						if (reply.type() == TQT_DBusMessage::ReplyMessage) {
+							return true;
+						}
 					}
-				}
-				else if (ps == TDESystemPowerState::Hibernate) {
-					TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
-								"org.freedesktop.login1",
-								"/org/freedesktop/login1",
-								"org.freedesktop.login1.Manager",
-								"Hibernate");
-					TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
-					if (reply.type() == TQT_DBusMessage::ReplyMessage) {
-						return true;
+					else if (ps == TDESystemPowerState::Hibernate) {
+						TQT_DBusMessage reply = logindProxy.sendWithReply("Hibernate", params);
+						if (reply.type() == TQT_DBusMessage::ReplyMessage) {
+							return true;
+						}
 					}
 				}
 			}
@@ -789,14 +786,15 @@ bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState
 			TQT_DBusConnection dbusConn;
 			dbusConn = TQT_DBusConnection::addConnection(TQT_DBusConnection::SystemBus);
 			if ( dbusConn.isConnected() ) {
-				TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
-							"org.trinitydesktop.login1",
-							"/org/freedesktop/login1",
-							"org.freedesktop.login1.Manager",
-							"PowerOff");
-				TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
-				if (reply.type() == TQT_DBusMessage::ReplyMessage) {
-					return true;
+				TQT_DBusProxy logindProxy("org.freedesktop.login1", "/org/freedesktop/login1",
+				                          "org.freedesktop.login1.Manager", dbusConn);
+				TQValueList<TQT_DBusData> params;
+				params << TQT_DBusData::fromBool(true);
+				if (logindProxy.canSend()) {
+					TQT_DBusMessage reply = logindProxy.sendWithReply("PowerOff", params);
+					if (reply.type() == TQT_DBusMessage::ReplyMessage) {
+						return true;
+					}
 				}
 			}
 		}
@@ -839,14 +837,15 @@ bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState
 			TQT_DBusConnection dbusConn;
 			dbusConn = TQT_DBusConnection::addConnection(TQT_DBusConnection::SystemBus);
 			if ( dbusConn.isConnected() ) {
-				TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
-							"org.trinitydesktop.login1",
-							"/org/freedesktop/login1",
-							"org.freedesktop.login1.Manager",
-							"Reboot");
-				TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
-				if (reply.type() == TQT_DBusMessage::ReplyMessage) {
-					return true;
+				TQT_DBusProxy logindProxy("org.freedesktop.login1", "/org/freedesktop/login1",
+				                          "org.freedesktop.login1.Manager", dbusConn);
+				TQValueList<TQT_DBusData> params;
+				params << TQT_DBusData::fromBool(true);
+				if (logindProxy.canSend()) {
+					TQT_DBusMessage reply = logindProxy.sendWithReply("Reboot", params);
+					if (reply.type() == TQT_DBusMessage::ReplyMessage) {
+						return true;
+					}
 				}
 			}
 		}