diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 3eb01e6..09fb244 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -845,7 +845,8 @@
      * width in {@link DeviceProfile#calculateCellWidth(int, int)}.
      */
     public int getUnusedHorizontalSpace() {
-        return getMeasuredWidth() - getPaddingLeft() - getPaddingRight() - (mCountX * mCellWidth);
+        return (mRotationMode.isTransposed ? getMeasuredHeight() : getMeasuredWidth())
+                - getPaddingLeft() - getPaddingRight() - (mCountX * mCellWidth);
     }
 
     public Drawable getScrimBackground() {
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 823fb6b..359d8d9 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -303,6 +303,7 @@
         LauncherAppState app = LauncherAppState.getInstance(this);
         mOldConfig = new Configuration(getResources().getConfiguration());
         mModel = app.setLauncher(this);
+        mRotationHelper = new RotationHelper(this);
         InvariantDeviceProfile idp = app.getInvariantDeviceProfile();
         initDeviceProfile(idp);
         idp.addOnChangeListener(this);
@@ -325,7 +326,6 @@
         setupViews();
         mPopupDataProvider = new PopupDataProvider(this);
 
-        mRotationHelper = new RotationHelper(this);
         mAppTransitionManager = LauncherAppTransitionManager.newInstance(this);
 
         boolean internalStateHandled = InternalStateHandler.handleCreate(this, getIntent());
@@ -396,12 +396,6 @@
                 }
             }
         });
-
-        if (FeatureFlags.FAKE_LANDSCAPE_UI.get()) {
-            WindowManager.LayoutParams lp = getWindow().getAttributes();
-            lp.rotationAnimation = WindowManager.LayoutParams.ROTATION_ANIMATION_SEAMLESS;
-            getWindow().setAttributes(lp);
-        }
     }
 
     @Override
@@ -428,9 +422,13 @@
         super.onConfigurationChanged(newConfig);
     }
 
+    private boolean supportsFakeLandscapeUI() {
+        return FeatureFlags.FAKE_LANDSCAPE_UI.get() && !mRotationHelper.homeScreenCanRotate();
+    }
+
     @Override
-    protected void reapplyUi() {
-        if (FeatureFlags.FAKE_LANDSCAPE_UI.get()) {
+    public void reapplyUi() {
+        if (supportsFakeLandscapeUI()) {
             mRotationMode = mStableDeviceProfile == null
                     ? RotationMode.NORMAL : UiFactory.getRotationMode(mDeviceProfile);
         }
@@ -486,7 +484,8 @@
             mDeviceProfile = mDeviceProfile.getMultiWindowProfile(this, mwSize);
         }
 
-        if (FeatureFlags.FAKE_LANDSCAPE_UI.get() && mDeviceProfile.isVerticalBarLayout()
+        if (supportsFakeLandscapeUI()
+                && mDeviceProfile.isVerticalBarLayout()
                 && !mDeviceProfile.isMultiWindowMode) {
             mStableDeviceProfile = mDeviceProfile.inv.portraitProfile;
             mRotationMode = UiFactory.getRotationMode(mDeviceProfile);
diff --git a/src/com/android/launcher3/config/BaseFlags.java b/src/com/android/launcher3/config/BaseFlags.java
index 70df97a..bad8282 100644
--- a/src/com/android/launcher3/config/BaseFlags.java
+++ b/src/com/android/launcher3/config/BaseFlags.java
@@ -111,7 +111,7 @@
             "Show chip hints and gleams on the overview screen");
 
     public static final TogglableFlag FAKE_LANDSCAPE_UI = new TogglableFlag(
-            "FAKE_LANDSCAPE_UI", false,
+            "FAKE_LANDSCAPE_UI", true,
             "Rotate launcher UI instead of using transposed layout");
 
     public static void initialize(Context context) {
diff --git a/src/com/android/launcher3/states/RotationHelper.java b/src/com/android/launcher3/states/RotationHelper.java
index fb41ea1..3727fa6 100644
--- a/src/com/android/launcher3/states/RotationHelper.java
+++ b/src/com/android/launcher3/states/RotationHelper.java
@@ -20,13 +20,16 @@
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
 import static android.util.DisplayMetrics.DENSITY_DEVICE_STABLE;
 
-import android.app.Activity;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.content.res.Resources;
+import android.view.WindowManager;
+import android.view.WindowManager.LayoutParams;
 
+import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.UiThreadHelper;
 
 /**
@@ -49,7 +52,7 @@
     public static final int REQUEST_ROTATE = 1;
     public static final int REQUEST_LOCK = 2;
 
-    private final Activity mActivity;
+    private final Launcher mLauncher;
     private final SharedPreferences mPrefs;
 
     private boolean mIgnoreAutoRotateSettings;
@@ -70,13 +73,13 @@
 
     private int mLastActivityFlags = -1;
 
-    public RotationHelper(Activity activity) {
-        mActivity = activity;
+    public RotationHelper(Launcher launcher) {
+        mLauncher = launcher;
 
         // On large devices we do not handle auto-rotate differently.
-        mIgnoreAutoRotateSettings = mActivity.getResources().getBoolean(R.bool.allow_rotation);
+        mIgnoreAutoRotateSettings = mLauncher.getResources().getBoolean(R.bool.allow_rotation);
         if (!mIgnoreAutoRotateSettings) {
-            mPrefs = Utilities.getPrefs(mActivity);
+            mPrefs = Utilities.getPrefs(mLauncher);
             mPrefs.registerOnSharedPreferenceChangeListener(this);
             mAutoRotateEnabled = mPrefs.getBoolean(ALLOW_ROTATION_PREFERENCE_KEY,
                     getAllowRotationDefaultValue());
@@ -85,11 +88,32 @@
         }
     }
 
+    public boolean homeScreenCanRotate() {
+        return mIgnoreAutoRotateSettings || mAutoRotateEnabled
+                || mStateHandlerRequest != REQUEST_NONE;
+    }
+
+    private void updateRotationAnimation() {
+        if (FeatureFlags.FAKE_LANDSCAPE_UI.get()) {
+            WindowManager.LayoutParams lp = mLauncher.getWindow().getAttributes();
+            lp.rotationAnimation = homeScreenCanRotate()
+                    ? WindowManager.LayoutParams.ROTATION_ANIMATION_ROTATE
+                    : WindowManager.LayoutParams.ROTATION_ANIMATION_SEAMLESS;
+            mLauncher.getWindow().setAttributes(lp);
+        }
+    }
+
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String s) {
+        boolean wasRotationEnabled = mAutoRotateEnabled;
         mAutoRotateEnabled = mPrefs.getBoolean(ALLOW_ROTATION_PREFERENCE_KEY,
                 getAllowRotationDefaultValue());
-        notifyChange();
+        if (mAutoRotateEnabled != wasRotationEnabled) {
+
+            notifyChange();
+            updateRotationAnimation();
+            mLauncher.reapplyUi();
+        }
     }
 
     public void setStateHandlerRequest(int request) {
@@ -109,7 +133,7 @@
     // Used by tests only.
     public void forceAllowRotationForTesting(boolean allowRotation) {
         mIgnoreAutoRotateSettings =
-                allowRotation || mActivity.getResources().getBoolean(R.bool.allow_rotation);
+                allowRotation || mLauncher.getResources().getBoolean(R.bool.allow_rotation);
         notifyChange();
     }
 
@@ -117,6 +141,7 @@
         if (!mInitialized) {
             mInitialized = true;
             notifyChange();
+            updateRotationAnimation();
         }
     }
 
@@ -150,7 +175,7 @@
         }
         if (activityFlags != mLastActivityFlags) {
             mLastActivityFlags = activityFlags;
-            UiThreadHelper.setOrientationAsync(mActivity, activityFlags);
+            UiThreadHelper.setOrientationAsync(mLauncher, activityFlags);
         }
     }