diff --git a/kcm/src/outputconfig.cpp b/kcm/src/outputconfig.cpp
--- a/kcm/src/outputconfig.cpp
+++ b/kcm/src/outputconfig.cpp
@@ -84,6 +84,7 @@
 
     connect(mOutput.data(), &KScreen::Output::scaleChanged,
             this, [=]() {
+                qDebug() << mOutput->scale();
                 const int index = mScale->findData(mOutput->scale());
                 mScale->setCurrentIndex(index);
             });
@@ -128,8 +129,20 @@
 
     if (mShowScaleOption) {
         mScale = new QComboBox(this);
-        mScale->addItem(i18nc("Scale multiplier, show everything at 1 times normal scale", "1x"), 1);
-        mScale->addItem(i18nc("Scale multiplier, show everything at 2 times normal scale", "2x"), 2);
+        mScale->addItem(i18nc("Scale multiplier, show everything at normal scale", "1x"), 1.0);
+
+    //FIXME #if Qt > 5.12
+        //this is needed as without Qt having XDGOutput support when Plasma tries to full screen a window it will still have the wrong logical size and explode
+//not added yet as Roman wanted to test and probably doesn't use dev.
+        //obviously it won't be merged as is.
+        mScale->addItem(i18nc("Scale multiplier, show everything at 125% normal scale",
+"1.25x"), 1.25);
+        mScale->addItem(i18nc("Scale multiplier, show everything at 150% normal scale",
+"1.5x"), 1.5);
+        mScale->addItem(i18nc("Scale multiplier, show everything at 175% normal scale",
+"1.75x"), 1.75);
+
+        mScale->addItem(i18nc("Scale multiplier, show everything at 200% normal scale", "2x"), 2.0);
         connect(mScale, static_cast<void(QComboBox::*)(int)>(&QComboBox::activated),
                 this, &OutputConfig::slotScaleChanged);
         mScale->setCurrentIndex(mScale->findData(mOutput->scale()));
@@ -244,7 +257,7 @@
 
 void OutputConfig::slotScaleChanged(int index)
 {
-    auto scale = mScale->itemData(index).toInt();
+    auto scale = mScale->itemData(index).toDouble();
     mOutput->setScale(scale);
     Q_EMIT changed();
 }