diff --git a/core/java/android/app/WallpaperManager.java b/core/java/android/app/WallpaperManager.java
index 0ea53ce52a521..ff69491352ffc 100644
--- a/core/java/android/app/WallpaperManager.java
+++ b/core/java/android/app/WallpaperManager.java
@@ -2458,7 +2458,12 @@ public class WallpaperManager {
 
         public void waitForCompletion() {
             try {
-                mLatch.await(30, TimeUnit.SECONDS);
+                final boolean completed = mLatch.await(30, TimeUnit.SECONDS);
+                if (completed) {
+                    Log.d(TAG, "Wallpaper set completion.");
+                } else {
+                    Log.d(TAG, "Timeout waiting for wallpaper set completion!");
+                }
             } catch (InterruptedException e) {
                 // This might be legit: the crop may take a very long time. Don't sweat
                 // it in that case; we are okay with display lagging behind in order to
diff --git a/core/java/android/service/wallpaper/WallpaperService.java b/core/java/android/service/wallpaper/WallpaperService.java
index e5792a9ef4e2b..5e86f2b27035a 100644
--- a/core/java/android/service/wallpaper/WallpaperService.java
+++ b/core/java/android/service/wallpaper/WallpaperService.java
@@ -578,6 +578,7 @@ public abstract class WallpaperService extends Service {
          */
         public void reportEngineShown(boolean waitForEngineShown) {
             if (mIWallpaperEngine.mShownReported) return;
+            Log.d(TAG, "reportEngineShown: shouldWait=" + waitForEngineShown);
             if (!waitForEngineShown) {
                 Message message = mCaller.obtainMessage(MSG_REPORT_SHOWN);
                 mCaller.removeMessages(MSG_REPORT_SHOWN);
diff --git a/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java b/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
index 189b86fd0ff15..414d927ec5095 100644
--- a/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
+++ b/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
@@ -320,9 +320,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
                                 IRemoteCallback.Stub callback = new IRemoteCallback.Stub() {
                                     @Override
                                     public void sendResult(Bundle data) throws RemoteException {
-                                        if (DEBUG) {
-                                            Slog.d(TAG, "publish system wallpaper changed!");
-                                        }
+                                        Slog.d(TAG, "publish system wallpaper changed!");
                                         notifyWallpaperChanged(wallpaper);
                                     }
                                 };
@@ -1551,6 +1549,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
                         mReply.sendResult(null);
                     } catch (RemoteException e) {
                         Binder.restoreCallingIdentity(ident);
+                        Slog.d(TAG, "failed to send callback!", e);
                     }
                     mReply = null;
                 }