Index: src/daemon/Greeter.cpp
--- src/daemon/Greeter.cpp.orig
+++ src/daemon/Greeter.cpp
@@ -229,7 +229,7 @@ namespace SDDM {
             qDebug() << "Greeter starting...";
 
             // start greeter
-            m_auth->setUser(QStringLiteral("sddm"));
+            m_auth->setUser(QStringLiteral("_sddm"));
             m_auth->setDisplayServerCommand(m_displayServerCmd);
             m_auth->setGreeter(true);
             m_auth->setSession(cmd.join(QLatin1Char(' ')));
