diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index aa0903c..f0093ab 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -308,6 +308,13 @@
 }
 
 flag {
+   name: "run_fingerprint_detect_on_dismissible_keyguard"
+   namespace: "systemui"
+   description: "Run fingerprint detect instead of authenticate if the keyguard is dismissible."
+   bug: "311145851"
+}
+
+flag {
    name: "bluetooth_qs_tile_dialog_auto_on_toggle"
    namespace: "systemui"
    description: "Displays the auto on toggle in the bluetooth QS tile dialog"
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
index 4d84d0b..e6b08c8 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -113,6 +113,7 @@
 import com.android.settingslib.fuelgauge.BatteryStatus;
 import com.android.systemui.CoreStartable;
 import com.android.systemui.Dumpable;
+import com.android.systemui.Flags;
 import com.android.systemui.biometrics.AuthController;
 import com.android.systemui.biometrics.FingerprintInteractiveToAuthProvider;
 import com.android.systemui.broadcast.BroadcastDispatcher;
@@ -373,6 +374,7 @@
     private List<SubscriptionInfo> mSubscriptionInfo;
     @VisibleForTesting
     protected int mFingerprintRunningState = BIOMETRIC_STATE_STOPPED;
+    private boolean mFingerprintDetectRunning;
     private boolean mIsDreaming;
     private boolean mLogoutEnabled;
     private int mActiveMobileDataSubscription = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
@@ -986,6 +988,7 @@
         final boolean wasCancellingRestarting = mFingerprintRunningState
                 == BIOMETRIC_STATE_CANCELLING_RESTARTING;
         mFingerprintRunningState = BIOMETRIC_STATE_STOPPED;
+        mFingerprintDetectRunning = false;
         if (wasCancellingRestarting) {
             KeyguardUpdateMonitor.this.updateFingerprintListeningState(BIOMETRIC_ACTION_UPDATE);
         } else {
@@ -1094,6 +1097,9 @@
         boolean wasRunning = mFingerprintRunningState == BIOMETRIC_STATE_RUNNING;
         boolean isRunning = fingerprintRunningState == BIOMETRIC_STATE_RUNNING;
         mFingerprintRunningState = fingerprintRunningState;
+        if (mFingerprintRunningState == BIOMETRIC_STATE_STOPPED) {
+            mFingerprintDetectRunning = false;
+        }
         mLogger.logFingerprintRunningState(mFingerprintRunningState);
         // Clients of KeyguardUpdateMonitor don't care about the internal state about the
         // asynchronousness of the cancel cycle. So only notify them if the actually running state
@@ -2066,6 +2072,7 @@
     @VisibleForTesting
     void resetBiometricListeningState() {
         mFingerprintRunningState = BIOMETRIC_STATE_STOPPED;
+        mFingerprintDetectRunning = false;
     }
 
     @VisibleForTesting
@@ -2504,8 +2511,10 @@
             return;
         }
         final boolean shouldListenForFingerprint = shouldListenForFingerprint(isUdfpsSupported());
-        final boolean runningOrRestarting = mFingerprintRunningState == BIOMETRIC_STATE_RUNNING
+        final boolean running = mFingerprintRunningState == BIOMETRIC_STATE_RUNNING;
+        final boolean runningOrRestarting = running
                 || mFingerprintRunningState == BIOMETRIC_STATE_CANCELLING_RESTARTING;
+        final boolean runDetect = shouldRunFingerprintDetect();
         if (runningOrRestarting && !shouldListenForFingerprint) {
             if (action == BIOMETRIC_ACTION_START) {
                 mLogger.v("Ignoring stopListeningForFingerprint()");
@@ -2517,10 +2526,24 @@
                 mLogger.v("Ignoring startListeningForFingerprint()");
                 return;
             }
-            startListeningForFingerprint();
+            startListeningForFingerprint(runDetect);
+        } else if (running && runDetect && !mFingerprintDetectRunning) {
+            if (action == BIOMETRIC_ACTION_STOP) {
+                mLogger.v("Ignoring startListeningForFingerprint(detect)");
+                return;
+            }
+            // stop running authentication and start running fingerprint detection
+            stopListeningForFingerprint();
+            startListeningForFingerprint(true);
         }
     }
 
+    private boolean shouldRunFingerprintDetect() {
+        return !isUnlockingWithFingerprintAllowed()
+                || (Flags.runFingerprintDetectOnDismissibleKeyguard()
+                && getUserCanSkipBouncer(mSelectedUserInteractor.getSelectedUserId()));
+    }
+
     /**
      * If a user is encrypted or not.
      * This is NOT related to the lock screen being visible or not.
@@ -2776,7 +2799,6 @@
                         && biometricEnabledForUser
                         && !isUserInLockdown(user);
         final boolean strongerAuthRequired = !isUnlockingWithFingerprintAllowed();
-        final boolean isSideFps = isSfpsSupported() && isSfpsEnrolled();
         final boolean shouldListenBouncerState =
                 !strongerAuthRequired || !mPrimaryBouncerIsOrWillBeShowing;
 
@@ -2839,7 +2861,7 @@
         }
     }
 
-    private void startListeningForFingerprint() {
+    private void startListeningForFingerprint(boolean runDetect) {
         final int userId = mSelectedUserInteractor.getSelectedUserId();
         final boolean unlockPossible = isUnlockWithFingerprintPossible(userId);
         if (mFingerprintCancelSignal != null) {
@@ -2869,18 +2891,20 @@
                         mFingerprintInteractiveToAuthProvider.getVendorExtension(userId));
             }
 
-            if (!isUnlockingWithFingerprintAllowed()) {
+            if (runDetect) {
                 mLogger.v("startListeningForFingerprint - detect");
                 mFpm.detectFingerprint(
                         mFingerprintCancelSignal,
                         mFingerprintDetectionCallback,
                         fingerprintAuthenticateOptions);
+                mFingerprintDetectRunning = true;
             } else {
                 mLogger.v("startListeningForFingerprint");
                 mFpm.authenticate(null /* crypto */, mFingerprintCancelSignal,
                         mFingerprintAuthenticationCallback,
                         null /* handler */,
                         fingerprintAuthenticateOptions);
+                mFingerprintDetectRunning = false;
             }
             setFingerprintRunningState(BIOMETRIC_STATE_RUNNING);
         }
@@ -3876,6 +3900,7 @@
                 mSelectedUserInteractor.getSelectedUserId()));
         pw.println("  getUserUnlockedWithBiometric()="
                 + getUserUnlockedWithBiometric(mSelectedUserInteractor.getSelectedUserId()));
+        pw.println("  mFingerprintDetectRunning=" + mFingerprintDetectRunning);
         pw.println("  SIM States:");
         for (SimData data : mSimDatas.values()) {
             pw.println("    " + data.toString());
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt b/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt
index 6345312..45967c6 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt
@@ -32,13 +32,13 @@
 import com.android.settingslib.Utils
 import com.android.systemui.CoreStartable
 import com.android.systemui.Flags.lightRevealMigration
-import com.android.systemui.res.R
 import com.android.systemui.biometrics.shared.model.UdfpsOverlayParams
 import com.android.systemui.dagger.SysUISingleton
-import com.android.systemui.flags.FeatureFlags
+import com.android.systemui.deviceentry.shared.DeviceEntryUdfpsRefactor
 import com.android.systemui.keyguard.WakefulnessLifecycle
 import com.android.systemui.log.core.LogLevel
 import com.android.systemui.plugins.statusbar.StatusBarStateController
+import com.android.systemui.res.R
 import com.android.systemui.statusbar.CircleReveal
 import com.android.systemui.statusbar.LiftReveal
 import com.android.systemui.statusbar.LightRevealEffect
@@ -50,6 +50,7 @@
 import com.android.systemui.statusbar.policy.ConfigurationController
 import com.android.systemui.statusbar.policy.KeyguardStateController
 import com.android.systemui.util.ViewController
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import java.io.PrintWriter
 import javax.inject.Inject
 import javax.inject.Provider
@@ -62,6 +63,7 @@
  *
  * The ripple uses the accent color of the current theme.
  */
+@ExperimentalCoroutinesApi
 @SysUISingleton
 class AuthRippleController @Inject constructor(
     private val sysuiContext: Context,
@@ -75,7 +77,6 @@
     private val udfpsControllerProvider: Provider<UdfpsController>,
     private val statusBarStateController: StatusBarStateController,
     private val displayMetrics: DisplayMetrics,
-    private val featureFlags: FeatureFlags,
     private val logger: KeyguardLogger,
     private val biometricUnlockController: BiometricUnlockController,
     private val lightRevealScrim: LightRevealScrim,
@@ -313,6 +314,18 @@
                 mView.fadeDwellRipple()
             }
         }
+
+        override fun onBiometricDetected(
+                userId: Int,
+                biometricSourceType: BiometricSourceType,
+                isStrongBiometric: Boolean
+        ) {
+            // TODO (b/309804148): add support detect auth ripple for deviceEntryUdfpsRefactor
+            if (!DeviceEntryUdfpsRefactor.isEnabled &&
+                    keyguardUpdateMonitor.getUserCanSkipBouncer(userId)) {
+                showUnlockRipple(biometricSourceType)
+            }
+        }
     }
 
     private val configurationChangedListener =
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
index c5ce856..9642895 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
@@ -120,6 +120,7 @@
 import com.android.keyguard.KeyguardUpdateMonitor.BiometricAuthenticated;
 import com.android.keyguard.logging.KeyguardUpdateMonitorLogger;
 import com.android.settingslib.fuelgauge.BatteryStatus;
+import com.android.systemui.Flags;
 import com.android.systemui.SysuiTestCase;
 import com.android.systemui.biometrics.AuthController;
 import com.android.systemui.biometrics.FingerprintInteractiveToAuthProvider;
@@ -923,8 +924,7 @@
     @Test
     public void trustAgentHasTrust() {
         // WHEN user has trust
-        mKeyguardUpdateMonitor.onTrustChanged(true, true,
-                mSelectedUserInteractor.getSelectedUserId(), 0, null);
+        givenSelectedUserCanSkipBouncerFromTrustedState();
 
         // THEN user is considered as "having trust" and bouncer can be skipped
         Assert.assertTrue(mKeyguardUpdateMonitor.getUserHasTrust(
@@ -948,8 +948,7 @@
     @Test
     public void trustAgentHasTrust_fingerprintLockout() {
         // GIVEN user has trust
-        mKeyguardUpdateMonitor.onTrustChanged(true, true,
-                mSelectedUserInteractor.getSelectedUserId(), 0, null);
+        givenSelectedUserCanSkipBouncerFromTrustedState();
         Assert.assertTrue(mKeyguardUpdateMonitor.getUserHasTrust(
                 mSelectedUserInteractor.getSelectedUserId()));
 
@@ -1992,6 +1991,43 @@
     }
 
     @Test
+    public void runFpDetectFlagDisabled_sideFps_keyguardDismissible_fingerprintAuthenticateRuns() {
+        mSetFlagsRule.disableFlags(Flags.FLAG_RUN_FINGERPRINT_DETECT_ON_DISMISSIBLE_KEYGUARD);
+
+        // Clear invocations, since previous setup (e.g. registering BiometricManager callbacks)
+        // will trigger updateBiometricListeningState();
+        clearInvocations(mFingerprintManager);
+        mKeyguardUpdateMonitor.resetBiometricListeningState();
+
+        // GIVEN the user can skip the bouncer
+        givenSelectedUserCanSkipBouncerFromTrustedState();
+        when(mStrongAuthTracker.isUnlockingWithBiometricAllowed(anyBoolean())).thenReturn(true);
+        mKeyguardUpdateMonitor.dispatchStartedGoingToSleep(0 /* why */);
+        mTestableLooper.processAllMessages();
+
+        // WHEN verify authenticate runs
+        verifyFingerprintAuthenticateCall();
+    }
+
+    @Test
+    public void sideFps_keyguardDismissible_fingerprintDetectRuns() {
+        mSetFlagsRule.enableFlags(Flags.FLAG_RUN_FINGERPRINT_DETECT_ON_DISMISSIBLE_KEYGUARD);
+        // Clear invocations, since previous setup (e.g. registering BiometricManager callbacks)
+        // will trigger updateBiometricListeningState();
+        clearInvocations(mFingerprintManager);
+        mKeyguardUpdateMonitor.resetBiometricListeningState();
+
+        // GIVEN the user can skip the bouncer
+        givenSelectedUserCanSkipBouncerFromTrustedState();
+        when(mStrongAuthTracker.isUnlockingWithBiometricAllowed(anyBoolean())).thenReturn(true);
+        mKeyguardUpdateMonitor.dispatchStartedGoingToSleep(0 /* why */);
+        mTestableLooper.processAllMessages();
+
+        // WHEN verify detect runs
+        verifyFingerprintDetectCall();
+    }
+
+    @Test
     public void testFingerprintSensorProperties() throws RemoteException {
         mFingerprintAuthenticatorsRegisteredCallback.onAllAuthenticatorsRegistered(
                 new ArrayList<>());
@@ -2096,6 +2132,11 @@
         verify(callback).onBiometricEnrollmentStateChanged(BiometricSourceType.FACE);
     }
 
+    private void givenSelectedUserCanSkipBouncerFromTrustedState() {
+        mKeyguardUpdateMonitor.onTrustChanged(true, true,
+                mSelectedUserInteractor.getSelectedUserId(), 0, null);
+    }
+
     private void verifyFingerprintAuthenticateNeverCalled() {
         verify(mFingerprintManager, never()).authenticate(any(), any(), any(), any(), any());
         verify(mFingerprintManager, never()).authenticate(any(), any(), any(), any(), anyInt(),
diff --git a/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt b/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt
index 1f7dd6d..c143bc0 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt
@@ -123,7 +123,6 @@
             udfpsControllerProvider,
             statusBarStateController,
             displayMetrics,
-            featureFlags,
             KeyguardLogger(logcatLogBuffer(AuthRippleController.TAG)),
             biometricUnlockController,
             lightRevealScrim,