diff --git a/services/core/java/com/android/server/am/EventLogTags.logtags b/services/core/java/com/android/server/am/EventLogTags.logtags
index 421b755..cf0de06 100644
--- a/services/core/java/com/android/server/am/EventLogTags.logtags
+++ b/services/core/java/com/android/server/am/EventLogTags.logtags
@@ -146,4 +146,7 @@
 30065 am_on_top_resumed_lost_called (Token|1|5),(Component Name|3),(Reason|3)
 
 # An activity been add into stopping list
-30066 am_add_to_stopping (User|1|5),(Token|1|5),(Component Name|3),(Reason|3)
\ No newline at end of file
+30066 am_add_to_stopping (User|1|5),(Token|1|5),(Component Name|3),(Reason|3)
+
+# Keyguard status changed
++30067 am_set_keyguard_shown (keyguardShowing|1),(aodShowing|1),(keyguardGoingAway|1),(Reason|3)
\ No newline at end of file
diff --git a/services/core/java/com/android/server/wm/KeyguardController.java b/services/core/java/com/android/server/wm/KeyguardController.java
index ca4749f..422b6e5 100644
--- a/services/core/java/com/android/server/wm/KeyguardController.java
+++ b/services/core/java/com/android/server/wm/KeyguardController.java
@@ -43,11 +43,13 @@
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.Trace;
+import android.util.EventLog;
 import android.util.Slog;
 import android.util.SparseArray;
 import android.util.proto.ProtoOutputStream;
 
 import com.android.internal.policy.IKeyguardDismissCallback;
+import com.android.server.am.EventLogTags;
 import com.android.server.policy.WindowManagerPolicy;
 import com.android.server.wm.ActivityTaskManagerInternal.SleepToken;
 
@@ -142,6 +144,11 @@
         if (!keyguardChanged && !aodChanged) {
             return;
         }
+        EventLog.writeEvent(EventLogTags.AM_SET_KEYGUARD_SHOWN,
+                keyguardShowing ? 1 : 0,
+                aodShowing ? 1 : 0,
+                mKeyguardGoingAway ? 1 : 0,
+                "setKeyguardShown");
         mKeyguardShowing = keyguardShowing;
         mAodShowing = aodShowing;
         mWindowManager.setAodShowing(aodShowing);
@@ -178,6 +185,11 @@
         mWindowManager.deferSurfaceLayout();
         try {
             setKeyguardGoingAway(true);
+            EventLog.writeEvent(EventLogTags.AM_SET_KEYGUARD_SHOWN,
+                    1 /* keyguardShowing */,
+                    mAodShowing ? 1 : 0,
+                    1 /* keyguardGoingAway */,
+                    "keyguardGoingAway");
             mRootActivityContainer.getDefaultDisplay().mDisplayContent
                     .prepareAppTransition(TRANSIT_KEYGUARD_GOING_AWAY,
                             false /* alwaysKeepCurrent */, convertTransitFlags(flags),