diff --git a/tdecore/tdehw/tderootsystemdevice.cpp b/tdecore/tdehw/tderootsystemdevice.cpp
index b9a0bef9c..09613778b 100644
--- a/tdecore/tdehw/tderootsystemdevice.cpp
+++ b/tdecore/tdehw/tderootsystemdevice.cpp
@@ -698,41 +698,32 @@ bool TDERootSystemDevice::setPowerState(TDESystemPowerState::TDESystemPowerState
 
 #ifdef WITH_LOGINDPOWER
 		{
-		  // No support for "freeze" in org.freedesktop.login1
+			// 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;
+						}
 					}
-				}
-				else if (ps == TDESystemPowerState::HybridSuspend) {
-					TQT_DBusMessage msg = TQT_DBusMessage::methodCall(
-								"org.freedesktop.login1",
-								"/org/freedesktop/login1",
-								"org.freedesktop.login1.Manager",
-								"HybridSleep");
-					TQT_DBusMessage reply = dbusConn.sendWithReply(msg);
-					if (reply.type() == TQT_DBusMessage::ReplyMessage) {
-						return true;
+					else if (ps == TDESystemPowerState::HybridSuspend) {
+						TQT_DBusMessage reply = logindProxy.sendWithReply("HybridSleep", params);
+						if (reply.type() == TQT_DBusMessage::ReplyMessage) {
+							return true;
+						}
 					}
 				}
 			}
@@ -927,14 +918,15 @@ 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;
+					}
 				}
 			}
 		}
@@ -994,14 +986,15 @@ 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;
+					}
 				}
 			}
 		}