diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
index 49843008af9f8..f7681e8240e8d 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -466,6 +466,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
                     FACE_AUTH_TRIGGERED_TRUST_DISABLED);
         }
 
+        mLogger.logTrustChanged(wasTrusted, enabled, userId);
         for (int i = 0; i < mCallbacks.size(); i++) {
             KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
             if (cb != null) {
@@ -487,6 +488,10 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
                     }
                 }
             }
+
+            if (message != null) {
+                mLogger.logShowTrustGrantedMessage(message.toString());
+            }
             for (int i = 0; i < mCallbacks.size(); i++) {
                 KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
                 if (cb != null) {
@@ -743,6 +748,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
         mFingerprintCancelSignal = null;
         updateBiometricListeningState(BIOMETRIC_ACTION_UPDATE,
                 FACE_AUTH_UPDATED_FP_AUTHENTICATED);
+        mLogger.d("onFingerprintAuthenticated");
         for (int i = 0; i < mCallbacks.size(); i++) {
             KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
             if (cb != null) {
@@ -986,6 +992,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
         mFaceCancelSignal = null;
         updateBiometricListeningState(BIOMETRIC_ACTION_UPDATE,
                 FACE_AUTH_UPDATED_ON_FACE_AUTHENTICATED);
+        mLogger.d("onFaceAuthenticated");
         for (int i = 0; i < mCallbacks.size(); i++) {
             KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
             if (cb != null) {
@@ -3445,6 +3452,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
         mUserFaceAuthenticated.clear();
         mTrustManager.clearAllBiometricRecognized(BiometricSourceType.FINGERPRINT, unlockedUser);
         mTrustManager.clearAllBiometricRecognized(BiometricSourceType.FACE, unlockedUser);
+        mLogger.d("clearBiometricRecognized");
 
         for (int i = 0; i < mCallbacks.size(); i++) {
             KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
@@ -3694,6 +3702,9 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
     @Override
     public void dump(PrintWriter pw, String[] args) {
         pw.println("KeyguardUpdateMonitor state:");
+        pw.println("  getUserHasTrust()=" + getUserHasTrust(getCurrentUser()));
+        pw.println("  getUserUnlockedWithBiometric()="
+                + getUserUnlockedWithBiometric(getCurrentUser()));
         pw.println("  SIM States:");
         for (SimData data : mSimDatas.values()) {
             pw.println("    " + data.toString());
diff --git a/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt b/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt
index 2bc98f1a535c1..7a00cd930f2a3 100644
--- a/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt
+++ b/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt
@@ -340,4 +340,40 @@ class KeyguardUpdateMonitorLogger @Inject constructor(
                     bool1 = dismissKeyguard
                 }, { "reportUserRequestedUnlock origin=$str1 reason=$str2 dismissKeyguard=$bool1" })
     }
+
+    fun logShowTrustGrantedMessage(
+            message: String
+    ) {
+        logBuffer.log(TAG, DEBUG, {
+            str1 = message
+        }, { "showTrustGrantedMessage message$str1" })
+    }
+
+    fun logTrustChanged(
+            wasTrusted: Boolean,
+            isNowTrusted: Boolean,
+            userId: Int
+    ) {
+        logBuffer.log(TAG, DEBUG, {
+            bool1 = wasTrusted
+            bool2 = isNowTrusted
+            int1 = userId
+        }, { "onTrustChanged[user=$int1] wasTrusted=$bool1 isNowTrusted=$bool2" })
+    }
+
+    fun logKeyguardStateUpdate(
+            secure: Boolean,
+            canDismissLockScreen: Boolean,
+            trusted: Boolean,
+            trustManaged: Boolean
+
+    ) {
+        logBuffer.log("KeyguardState", DEBUG, {
+            bool1 = secure
+            bool2 = canDismissLockScreen
+            bool3 = trusted
+            bool4 = trustManaged
+        }, { "#update secure=$bool1 canDismissKeyguard=$bool2" +
+                " trusted=$bool3 trustManaged=$bool4" })
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardStateControllerImpl.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardStateControllerImpl.java
index bdac88837969d..f4d08e01d5c32 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardStateControllerImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardStateControllerImpl.java
@@ -31,6 +31,7 @@ import androidx.annotation.VisibleForTesting;
 import com.android.internal.widget.LockPatternUtils;
 import com.android.keyguard.KeyguardUpdateMonitor;
 import com.android.keyguard.KeyguardUpdateMonitorCallback;
+import com.android.keyguard.logging.KeyguardUpdateMonitorLogger;
 import com.android.systemui.Dumpable;
 import com.android.systemui.R;
 import com.android.systemui.dagger.SysUISingleton;
@@ -60,6 +61,7 @@ public class KeyguardStateControllerImpl implements KeyguardStateController, Dum
     private final KeyguardUpdateMonitorCallback mKeyguardUpdateMonitorCallback =
             new UpdateMonitorCallback();
     private final Lazy<KeyguardUnlockAnimationController> mUnlockAnimationControllerLazy;
+    private final KeyguardUpdateMonitorLogger mLogger;
 
     private boolean mCanDismissLockScreen;
     private boolean mShowing;
@@ -107,8 +109,10 @@ public class KeyguardStateControllerImpl implements KeyguardStateController, Dum
             KeyguardUpdateMonitor keyguardUpdateMonitor,
             LockPatternUtils lockPatternUtils,
             Lazy<KeyguardUnlockAnimationController> keyguardUnlockAnimationController,
+            KeyguardUpdateMonitorLogger logger,
             DumpManager dumpManager) {
         mContext = context;
+        mLogger = logger;
         mKeyguardUpdateMonitor = keyguardUpdateMonitor;
         mLockPatternUtils = lockPatternUtils;
         mKeyguardUpdateMonitor.registerCallback(mKeyguardUpdateMonitorCallback);
@@ -245,6 +249,8 @@ public class KeyguardStateControllerImpl implements KeyguardStateController, Dum
             mTrusted = trusted;
             mTrustManaged = trustManaged;
             mFaceAuthEnabled = faceAuthEnabled;
+            mLogger.logKeyguardStateUpdate(
+                    mSecure, mCanDismissLockScreen, mTrusted, mTrustManaged);
             notifyUnlockedChanged();
         }
         Trace.endSection();
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/KeyguardStateControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/KeyguardStateControllerTest.java
index 4a8170fc2955d..8f363efd9f519 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/KeyguardStateControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/KeyguardStateControllerTest.java
@@ -31,6 +31,7 @@ import androidx.test.filters.SmallTest;
 
 import com.android.internal.widget.LockPatternUtils;
 import com.android.keyguard.KeyguardUpdateMonitor;
+import com.android.keyguard.logging.KeyguardUpdateMonitorLogger;
 import com.android.systemui.SysuiTestCase;
 import com.android.systemui.dump.DumpManager;
 import com.android.systemui.keyguard.KeyguardUnlockAnimationController;
@@ -57,6 +58,8 @@ public class KeyguardStateControllerTest extends SysuiTestCase {
     private DumpManager mDumpManager;
     @Mock
     private Lazy<KeyguardUnlockAnimationController> mKeyguardUnlockAnimationControllerLazy;
+    @Mock
+    private KeyguardUpdateMonitorLogger mLogger;
 
     @Before
     public void setup() {
@@ -66,6 +69,7 @@ public class KeyguardStateControllerTest extends SysuiTestCase {
                 mKeyguardUpdateMonitor,
                 mLockPatternUtils,
                 mKeyguardUnlockAnimationControllerLazy,
+                mLogger,
                 mDumpManager);
     }