diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
index d14666de4b3e6..cc8668e62d3c4 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -2319,7 +2319,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
      */
     public void requestFaceAuth(boolean userInitiatedRequest,
             @FaceAuthApiRequestReason String reason) {
-        mLogger.logFaceAuthRequested(userInitiatedRequest);
+        mLogger.logFaceAuthRequested(userInitiatedRequest, reason);
         updateFaceListeningState(BIOMETRIC_ACTION_START, apiRequestReasonToUiEvent(reason));
     }
 
diff --git a/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt b/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt
index bf9f4c88bde34..8703c4ba99132 100644
--- a/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt
+++ b/packages/SystemUI/src/com/android/keyguard/logging/KeyguardUpdateMonitorLogger.kt
@@ -108,10 +108,11 @@ class KeyguardUpdateMonitorLogger @Inject constructor(
                 }, { "Face help received, msgId: $int1 msg: $str1" })
     }
 
-    fun logFaceAuthRequested(userInitiatedRequest: Boolean) {
-        logBuffer.log(TAG, DEBUG,
-                { bool1 = userInitiatedRequest },
-                { "requestFaceAuth() userInitiated=$bool1" })
+    fun logFaceAuthRequested(userInitiatedRequest: Boolean, reason: String) {
+        logBuffer.log(TAG, DEBUG, {
+            bool1 = userInitiatedRequest
+            str1 = reason
+        }, { "requestFaceAuth() userInitiated=$bool1 reason=$str1" })
     }
 
     fun logFaceAuthSuccess(userId: Int) {
diff --git a/packages/SystemUI/src/com/android/systemui/log/dagger/LogModule.java b/packages/SystemUI/src/com/android/systemui/log/dagger/LogModule.java
index d298ff9a8de98..529d0662028ae 100644
--- a/packages/SystemUI/src/com/android/systemui/log/dagger/LogModule.java
+++ b/packages/SystemUI/src/com/android/systemui/log/dagger/LogModule.java
@@ -322,7 +322,7 @@ public class LogModule {
     @SysUISingleton
     @KeyguardUpdateMonitorLog
     public static LogBuffer provideKeyguardUpdateMonitorLogBuffer(LogBufferFactory factory) {
-        return factory.create("KeyguardUpdateMonitorLog", 200);
+        return factory.create("KeyguardUpdateMonitorLog", 400);
     }
 
     /**