diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessController.kt b/packages/SystemUI/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessController.kt
index a7d17e128ff32..b4137fa80f19f 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessController.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessController.kt
@@ -64,7 +64,8 @@ open class FaceAuthScreenBrightnessController(
     private val globalSettings: GlobalSettings,
     private val systemSettings: SystemSettings,
     private val mainHandler: Handler,
-    private val dumpManager: DumpManager
+    private val dumpManager: DumpManager,
+    private val enabled: Boolean
 ) : Dumpable {
 
     private var userDefinedBrightness: Float = 1f
@@ -86,7 +87,7 @@ open class FaceAuthScreenBrightnessController(
                 return
             }
             // TODO enable only when receiving a low-light error
-            overridingBrightness = running
+            overridingBrightness = if (enabled) running else false
         }
     }
     private lateinit var whiteOverlay: View
@@ -188,6 +189,7 @@ open class FaceAuthScreenBrightnessController(
             println("brightnessAnimationDuration: $brightnessAnimationDuration")
             println("maxScreenBrightness: $maxScreenBrightness")
             println("userDefinedBrightness: $userDefinedBrightness")
+            println("enabled: $enabled")
         }
     }
 }
\ No newline at end of file
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java b/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java
index d7b5eea84c363..626abfcc85fde 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java
@@ -142,8 +142,9 @@ public class KeyguardModule {
             return Optional.empty();
         }
 
+        // currently disabled (doesn't ramp up brightness or use scrim) see b/175918367
         return Optional.of(new FaceAuthScreenBrightnessController(
                 notificationShadeWindowController, keyguardUpdateMonitor, resources,
-                globalSetting, systemSettings, handler, dumpManager));
+                globalSetting, systemSettings, handler, dumpManager, false));
     }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessControllerTest.kt b/packages/SystemUI/tests/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessControllerTest.kt
index 73a7ca93507d2..cb05a6b21b3a1 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessControllerTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/FaceAuthScreenBrightnessControllerTest.kt
@@ -83,7 +83,7 @@ class FaceAuthScreenBrightnessControllerTest : SysuiTestCase() {
         MockitoAnnotations.initMocks(this)
         faceAuthScreenBrightnessController = object : FaceAuthScreenBrightnessController(
                 notificationShadeWindowController, keyguardUpdateMonitor, resources, globalSettings,
-                systemSettings, mainHandler, dumpManager) {
+                systemSettings, mainHandler, dumpManager, true) {
             override fun createAnimator(start: Float, end: Float) = animator
         }
         `when`(systemSettings.getFloat(eq(SCREEN_BRIGHTNESS_FLOAT))).thenReturn(INITIAL_BRIGHTNESS)