diff --git a/core/java/com/android/internal/protolog/ProtoLogGroup.java b/core/java/com/android/internal/protolog/ProtoLogGroup.java
index 7f36c79..1c07ecd 100644
--- a/core/java/com/android/internal/protolog/ProtoLogGroup.java
+++ b/core/java/com/android/internal/protolog/ProtoLogGroup.java
@@ -88,6 +88,7 @@
     WM_DEBUG_WALLPAPER(Consts.ENABLE_DEBUG, Consts.ENABLE_LOG_TO_PROTO_DEBUG, false, Consts.TAG_WM),
     WM_DEBUG_BACK_PREVIEW(Consts.ENABLE_DEBUG, Consts.ENABLE_LOG_TO_PROTO_DEBUG, true,
             "CoreBackPreview"),
+    WM_DEBUG_DREAM(Consts.ENABLE_DEBUG, Consts.ENABLE_LOG_TO_PROTO_DEBUG, true, Consts.TAG_WM),
     TEST_GROUP(true, true, false, "WindowManagerProtoLogTest");
 
     private final boolean mEnabled;
diff --git a/data/etc/services.core.protolog.json b/data/etc/services.core.protolog.json
index ce6df20..b1ecb43 100644
--- a/data/etc/services.core.protolog.json
+++ b/data/etc/services.core.protolog.json
@@ -3091,6 +3091,12 @@
       "group": "WM_DEBUG_STARTING_WINDOW",
       "at": "com\/android\/server\/wm\/WindowStateAnimator.java"
     },
+    "829869827": {
+      "message": "Cannot launch dream activity due to invalid state. dreaming: %b packageName: %s",
+      "level": "ERROR",
+      "group": "WM_DEBUG_DREAM",
+      "at": "com\/android\/server\/wm\/ActivityTaskManagerService.java"
+    },
     "835814848": {
       "message": "%s",
       "level": "INFO",
@@ -4123,6 +4129,12 @@
       "group": "WM_DEBUG_WINDOW_ORGANIZER",
       "at": "com\/android\/server\/wm\/TaskOrganizerController.java"
     },
+    "1918771553": {
+      "message": "Dream packageName does not match active dream. Package %s does not match %s or %s",
+      "level": "ERROR",
+      "group": "WM_DEBUG_DREAM",
+      "at": "com\/android\/server\/wm\/ActivityTaskManagerService.java"
+    },
     "1921821199": {
       "message": "Preserving %s until the new one is added",
       "level": "VERBOSE",
@@ -4365,6 +4377,9 @@
     "WM_DEBUG_DRAW": {
       "tag": "WindowManager"
     },
+    "WM_DEBUG_DREAM": {
+      "tag": "WindowManager"
+    },
     "WM_DEBUG_FOCUS": {
       "tag": "WindowManager"
     },
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 75e24a8..0398cc8 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -68,6 +68,7 @@
 import static android.view.WindowManagerPolicyConstants.KEYGUARD_GOING_AWAY_FLAG_TO_LAUNCHER_CLEAR_SNAPSHOT;
 
 import static com.android.internal.protolog.ProtoLogGroup.WM_DEBUG_CONFIGURATION;
+import static com.android.internal.protolog.ProtoLogGroup.WM_DEBUG_DREAM;
 import static com.android.internal.protolog.ProtoLogGroup.WM_DEBUG_FOCUS;
 import static com.android.internal.protolog.ProtoLogGroup.WM_DEBUG_IMMERSIVE;
 import static com.android.internal.protolog.ProtoLogGroup.WM_DEBUG_LOCKTASK;
@@ -1446,6 +1447,8 @@
 
     boolean canLaunchDreamActivity(String packageName) {
         if (!mDreaming || packageName == null) {
+            ProtoLog.e(WM_DEBUG_DREAM, "Cannot launch dream activity due to invalid state. "
+                    + "dreaming: %b packageName: %s", mDreaming, packageName);
             return false;
         }
         final DreamManagerInternal dreamManager =
@@ -1461,6 +1464,9 @@
         if (activeDoze != null && packageName.equals(activeDoze.getPackageName())) {
             return true;
         }
+        ProtoLog.e(WM_DEBUG_DREAM,
+                "Dream packageName does not match active dream. Package %s does not match %s or %s",
+                packageName, String.valueOf(activeDream), String.valueOf(activeDoze));
         return false;
     }