diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index 27e2995..61023be 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -394,6 +394,9 @@
     }
 
     private void onConfigChanged(Context context) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "IDP.onConfigChanged");
+        }
         // Config changes, what shall we do?
         InvariantDeviceProfile oldProfile = new InvariantDeviceProfile(this);
 
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 30dd548..a54c791 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -551,11 +551,16 @@
     @Override
     public void onConfigurationChanged(Configuration newConfig) {
         int diff = newConfig.diff(mOldConfig);
-
         if ((diff & (CONFIG_ORIENTATION | CONFIG_SCREEN_SIZE)) != 0) {
             onIdpChanged(mDeviceProfile.inv);
         }
 
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "onConfigurationChanged: diff=" + diff);
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "newConfig=" + newConfig);
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "oldConfig=" + mOldConfig);
+        }
+
         mOldConfig.setTo(newConfig);
         super.onConfigurationChanged(newConfig);
     }
@@ -567,7 +572,7 @@
 
     private void onIdpChanged(InvariantDeviceProfile idp) {
         if (TestProtocol.sDebugTracing) {
-            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "onIdpChanged", new Throwable());
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "onIdpChanged");
         }
         initDeviceProfile(idp);
         dispatchDeviceProfileChanged();
diff --git a/src/com/android/launcher3/util/ConfigMonitor.java b/src/com/android/launcher3/util/ConfigMonitor.java
index b3b69f6..f7023e8 100644
--- a/src/com/android/launcher3/util/ConfigMonitor.java
+++ b/src/com/android/launcher3/util/ConfigMonitor.java
@@ -26,6 +26,7 @@
 import android.graphics.Point;
 import android.util.Log;
 
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.DisplayController.DisplayInfoChangeListener;
 import com.android.launcher3.util.DisplayController.Info;
 
@@ -72,6 +73,10 @@
 
         // Listen for configuration change
         mContext.registerReceiver(this, new IntentFilter(Intent.ACTION_CONFIGURATION_CHANGED));
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "ConfigMonitor.register: this="
+                    + System.identityHashCode(this) + " callback=" + callback.getClass().getName());
+        }
     }
 
     @Override
@@ -113,6 +118,10 @@
     }
 
     public void unregister() {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.LAUNCHER_NOT_TRANSPOSED, "ConfigMonitor.unregister: this="
+                    + System.identityHashCode(this));
+        }
         try {
             mContext.unregisterReceiver(this);
             DisplayController.getDefaultDisplay(mContext).removeChangeListener(this);