--- sddm-0.12.0/src/common/Session.cpp~	2015-09-07 13:40:47.000000000 +0300
+++ sddm-0.12.0/src/common/Session.cpp	2015-09-07 13:40:41.000000000 +0300
@@ -150,6 +150,14 @@ namespace SDDM {
 
         file.close();
 
+	if( m_desktopNames.isEmpty() ) {
+	    m_desktopNames = desktopSession();
+	    if (m_desktopNames.contains(QStringLiteral("PLASMA"), Qt::CaseInsensitive)
+		|| m_desktopNames.contains(QStringLiteral("KDE"), Qt::CaseInsensitive) ) {
+		m_desktopNames = QStringLiteral("KDE");
+            }
+	}
+
         m_type = type;
         m_valid = true;
     }