diff --git a/uniauth-backend/src/serviceinterface.cpp b/uniauth-backend/src/serviceinterface.cpp
index 6969efb..1399dae 100644
--- a/uniauth-backend/src/serviceinterface.cpp
+++ b/uniauth-backend/src/serviceinterface.cpp
@@ -41,7 +41,7 @@
 #include <openssl/pem.h>
 
 #define UKUI_GREETER        "/usr/sbin/ukui-greeter"
-#define UKUI_SCREENSAVER    "/usr/bin/ukui-screensaver-dialog"
+#define UKUI_SCREENSAVER    "/usr/bin/ukui-screensaver-backend"
 
 #define GREETER_DBUS_PATH           "/"
 #define GREETER_DBUS_INTERFACE      "org.ukui.greeter"
@@ -916,13 +916,13 @@ bool ServiceInterface::sendPassword(QString username,QByteArray password)
     rsac.decrypt(password, decryptText, priKey);     // 解密
     //如果处于登录状态
 
-    qDebug()<<"sendPassword"<<loginAppList.count();
+    qDebug()<<"sendPassword"<<loginAppList.count()<<loginAppList;
     if(loginAppList.contains("lightdm")){
         qDebug()<<"login:";
         isFirstLogin = false;
-        QString publicKey = getLoginPubKey(loginAppList.value("lightdm"),GREETER_DBUS_PATH,GREETER_DBUS_INTERFACE);
+        QString publicKey = getLoginPubKey(loginAppList.value("lightdm"),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE);
         rsac.encrypt(decryptText, encryptText, publicKey.toLatin1());
-        return sendLoginPassword(loginAppList.value("lightdm"),GREETER_DBUS_PATH,GREETER_DBUS_INTERFACE,username,encryptText);
+        return sendLoginPassword(loginAppList.value("lightdm"),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE,username,encryptText);
     }
 
     //处于锁屏状态
@@ -934,6 +934,14 @@ bool ServiceInterface::sendPassword(QString username,QByteArray password)
         return sendLoginPassword(loginAppList.value(username),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE,username,encryptText);
     }
 
+    if(loginAppList.count()>0){
+	qDebug()<<"login by screensaver:";
+	isFirstLogin = false;
+        QString publicKey = getLoginPubKey(loginAppList.value(loginAppList.firstKey()),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE);
+        rsac.encrypt(decryptText, encryptText, publicKey.toLatin1());
+        return sendLoginPassword(loginAppList.value(loginAppList.firstKey()),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE,username,encryptText);
+    }
+
     //如果是第一次调用，则配置自动登录
     if(isFirstLogin){
         qDebug()<<"isFirstLogin:";
@@ -965,13 +973,13 @@ bool ServiceInterface::handleFirstSingleLogn(QString username,QByteArray decrypt
      qDebug()<<loginAppList.count();
      if(loginAppList.contains("lightdm")){
          isFirstLogin = false;
-         QString publicKey = getLoginPubKey(loginAppList.value("lightdm"),GREETER_DBUS_PATH,GREETER_DBUS_INTERFACE);
+         QString publicKey = getLoginPubKey(loginAppList.value("lightdm"),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE);
          if(publicKey.isEmpty()){
              qDebug()<<"get Login PubKey failed!";
              return false;
          }
          rsac.encrypt(decryptText, encryptText, publicKey.toLatin1());
-         return sendLoginPassword(loginAppList.value("lightdm"),GREETER_DBUS_PATH,GREETER_DBUS_INTERFACE,username,encryptText);
+         return sendLoginPassword(loginAppList.value("lightdm"),SCREENSAVER_DBUS_PATH,SCREENSAVER_DBUS_INTERFACE,username,encryptText);
      }
      return ret;
 }
@@ -1018,7 +1026,6 @@ bool  ServiceInterface::sendLoginPassword(QString service,QString path,QString i
                          path,
                          interface,
                          QDBusConnection::systemBus());
-
     QDBusReply<bool> stateReply = iface.call("sendPassword",username,array);
     if(!stateReply.isValid()){
         disconnect(connection);