diff --git a/abstract_output.h b/abstract_output.h
--- a/abstract_output.h
+++ b/abstract_output.h
@@ -30,6 +30,8 @@
 #include <QSize>
 #include <QVector>
 
+#include <KWayland/Server/outputdevice_interface.h>
+
 namespace KWayland
 {
 namespace Server
@@ -88,7 +90,6 @@
      * This sets the changes and tests them against the specific output
      */
     void setChanges(KWayland::Server::OutputChangeSet *changeset);
-    virtual bool commitChanges() { return false; }
 
     QPointer<KWayland::Server::OutputInterface> waylandOutput() const {
         return m_waylandOutput;
@@ -103,9 +104,7 @@
     }
 
 protected:
-    QPointer<KWayland::Server::OutputChangeSet> changes() const {
-        return m_changeset;
-    }
+    void initWaylandOutput();
 
     QPointer<KWayland::Server::XdgOutputInterface> xdgOutput() const {
         return m_xdgOutput;
@@ -137,10 +136,14 @@
     void setInternal(bool set) {
         m_internal = set;
     }
-    void initWaylandOutput();
+    virtual void updateMode(int modeIndex) {
+        Q_UNUSED(modeIndex);
+    }
+    virtual void transform(KWayland::Server::OutputDeviceInterface::Transform transform) {
+        Q_UNUSED(transform);
+    }
 
 private:
-    QPointer<KWayland::Server::OutputChangeSet> m_changeset;
     QPointer<KWayland::Server::OutputInterface> m_waylandOutput;
     QPointer<KWayland::Server::XdgOutputInterface> m_xdgOutput;
     QPointer<KWayland::Server::OutputDeviceInterface> m_waylandOutputDevice;
diff --git a/abstract_output.cpp b/abstract_output.cpp
--- a/abstract_output.cpp
+++ b/abstract_output.cpp
@@ -24,7 +24,6 @@
 #include <KWayland/Server/display.h>
 #include <KWayland/Server/output_interface.h>
 #include <KWayland/Server/outputchangeset.h>
-#include <KWayland/Server/outputdevice_interface.h>
 #include <KWayland/Server/xdgoutput_interface.h>
 // KF5
 #include <KLocalizedString>
@@ -105,9 +104,32 @@
 
 void AbstractOutput::setChanges(KWayland::Server::OutputChangeSet *changes)
 {
-    m_changeset = changes;
-    qCDebug(KWIN_CORE) << "set changes in AbstractOutput";
-    commitChanges();
+    qCDebug(KWIN_CORE) << "Set changes in AbstractOutput.";
+    Q_ASSERT(!m_waylandOutputDevice.isNull());
+
+    if (!changes) {
+        qCDebug(KWIN_CORE) << "No changes.";
+        // No changes to an output is an entirely valid thing
+    }
+    //enabledChanged is handled by plugin code
+    if (changes->modeChanged()) {
+        qCDebug(KWIN_CORE) << "Setting new mode:" << changes->mode();
+        m_waylandOutputDevice->setCurrentMode(changes->mode());
+        updateMode(changes->mode());
+    }
+    if (changes->transformChanged()) {
+        qCDebug(KWIN_CORE) << "Server setting transform: " << (int)(changes->transform());
+        transform(changes->transform());
+    }
+    if (changes->positionChanged()) {
+        qCDebug(KWIN_CORE) << "Server setting position: " << changes->position();
+        setGlobalPos(changes->position());
+        // may just work already!
+    }
+    if (changes->scaleChanged()) {
+        qCDebug(KWIN_CORE) << "Setting scale:" << changes->scale();
+        setScale(changes->scaleF());
+    }
 }
 
 void AbstractOutput::createXdgOutput()
diff --git a/plugins/platforms/drm/drm_output.h b/plugins/platforms/drm/drm_output.h
--- a/plugins/platforms/drm/drm_output.h
+++ b/plugins/platforms/drm/drm_output.h
@@ -31,8 +31,6 @@
 #include <QVector>
 #include <xf86drmMode.h>
 
-#include <KWayland/Server/outputdevice_interface.h>
-
 namespace KWin
 {
 
@@ -75,8 +73,6 @@
      */
     void setEnabled(bool enabled);
 
-    bool commitChanges() override;
-
     QSize pixelSize() const override;
 
     int currentRefreshRate() const;
@@ -135,9 +131,9 @@
     void dpmsOffHandler();
     bool dpmsAtomicOff();
     bool atomicReqModesetPopulate(drmModeAtomicReq *req, bool enable);
-    void updateMode(int modeIndex);
+    void updateMode(int modeIndex) override;
 
-    void transform(KWayland::Server::OutputDeviceInterface::Transform transform);
+    void transform(KWayland::Server::OutputDeviceInterface::Transform transform) override;
     void automaticRotation();
 
     int getGammaRampSize() const override;
diff --git a/plugins/platforms/drm/drm_output.cpp b/plugins/platforms/drm/drm_output.cpp
--- a/plugins/platforms/drm/drm_output.cpp
+++ b/plugins/platforms/drm/drm_output.cpp
@@ -752,40 +752,6 @@
     return wlOutput->refreshRate();
 }
 
-bool DrmOutput::commitChanges()
-{
-    auto wlOutputDevice = waylandOutputDevice();
-    Q_ASSERT(!wlOutputDevice.isNull());
-
-    auto changeset = changes();
-
-    if (changeset.isNull()) {
-        qCDebug(KWIN_DRM) << "no changes";
-        // No changes to an output is an entirely valid thing
-        return true;
-    }
-    //enabledChanged is handled by drmbackend
-    if (changeset->modeChanged()) {
-        qCDebug(KWIN_DRM) << "Setting new mode:" << changeset->mode();
-        wlOutputDevice->setCurrentMode(changeset->mode());
-        updateMode(changeset->mode());
-    }
-    if (changeset->transformChanged()) {
-        qCDebug(KWIN_DRM) << "Server setting transform: " << (int)(changeset->transform());
-        transform(changeset->transform());
-    }
-    if (changeset->positionChanged()) {
-        qCDebug(KWIN_DRM) << "Server setting position: " << changeset->position();
-        setGlobalPos(changeset->position());
-        // may just work already!
-    }
-    if (changeset->scaleChanged()) {
-        qCDebug(KWIN_DRM) << "Setting scale:" << changeset->scale();
-        setScale(changeset->scaleF());
-    }
-    return true;
-}
-
 void DrmOutput::transform(KWayland::Server::OutputDeviceInterface::Transform transform)
 {
     waylandOutputDevice()->setTransform(transform);