diff --git a/src/output.cpp b/src/output.cpp
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -27,6 +27,7 @@
 #include <QStringList>
 #include <QScopedPointer>
 #include <QRect>
+#include <QCryptographicHash>
 
 using namespace KScreen;
 
@@ -215,7 +216,9 @@
     if (edid() && edid()->isValid()) {
         return edid()->hash();
     }
-    return name();
+    const auto hash = QCryptographicHash::hash(name().toLatin1(),
+                                               QCryptographicHash::Md5);
+    return QString::fromLatin1(hash.toHex());
 }
 
 Output::Type Output::type() const