diff --git a/plugins/platforms/drm/drm_backend.cpp b/plugins/platforms/drm/drm_backend.cpp
--- a/plugins/platforms/drm/drm_backend.cpp
+++ b/plugins/platforms/drm/drm_backend.cpp
@@ -387,6 +387,7 @@
         }
         drmoutput->setChanges(changeset);
     }
+    emit screens()->changed();
 }
 
 DrmOutput *DrmBackend::findOutput(quint32 connector)
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
@@ -604,6 +604,7 @@
         qCDebug(KWIN_DRM) << "Server setting position: " << m_changeset->position();
         m_waylandOutput->setGlobalPosition(m_changeset->position());
         m_waylandOutputDevice->setGlobalPosition(m_changeset->position());
+        setGlobalPos(m_changeset->position());
         // may just work already!
     }
     if (m_changeset->scaleChanged()) {