diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index 4e18222355e6d..71f438eb0455d 100644
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -341,6 +341,8 @@
 
     <uses-permission android:name="android.permission.SET_UNRESTRICTED_KEEP_CLEAR_AREAS" />
 
+    <uses-permission android:name="android.permission.MONITOR_KEYBOARD_BACKLIGHT" />
+
     <protected-broadcast android:name="com.android.settingslib.action.REGISTER_SLICE_RECEIVER" />
     <protected-broadcast android:name="com.android.settingslib.action.UNREGISTER_SLICE_RECEIVER" />
     <protected-broadcast android:name="com.android.settings.flashlight.action.FLASHLIGHT_CHANGED" />
diff --git a/packages/SystemUI/src/com/android/systemui/keyboard/data/repository/KeyboardRepository.kt b/packages/SystemUI/src/com/android/systemui/keyboard/data/repository/KeyboardRepository.kt
index 70faf406d6213..dd5c5d31fae3b 100644
--- a/packages/SystemUI/src/com/android/systemui/keyboard/data/repository/KeyboardRepository.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyboard/data/repository/KeyboardRepository.kt
@@ -18,15 +18,19 @@
 package com.android.systemui.keyboard.data.repository
 
 import android.hardware.input.InputManager
+import android.hardware.input.InputManager.KeyboardBacklightListener
+import android.hardware.input.KeyboardBacklightState
 import com.android.systemui.common.coroutine.ChannelExt.trySendWithFailureLogging
 import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.dagger.qualifiers.Background
 import com.android.systemui.keyboard.data.model.BacklightModel
+import java.util.concurrent.Executor
 import javax.inject.Inject
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.channels.SendChannel
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted
@@ -51,24 +55,22 @@ constructor(
 
     private val connectedDeviceIds: Flow<Set<Int>> =
         conflatedCallbackFlow {
-                fun send(element: Set<Int>) = trySendWithFailureLogging(element, TAG)
-
                 var connectedKeyboards = inputManager.inputDeviceIds.toSet()
                 val listener =
                     object : InputManager.InputDeviceListener {
                         override fun onInputDeviceAdded(deviceId: Int) {
                             connectedKeyboards = connectedKeyboards + deviceId
-                            send(connectedKeyboards)
+                            sendWithLogging(connectedKeyboards)
                         }
 
                         override fun onInputDeviceChanged(deviceId: Int) = Unit
 
                         override fun onInputDeviceRemoved(deviceId: Int) {
                             connectedKeyboards = connectedKeyboards - deviceId
-                            send(connectedKeyboards)
+                            sendWithLogging(connectedKeyboards)
                         }
                     }
-                send(connectedKeyboards)
+                sendWithLogging(connectedKeyboards)
                 inputManager.registerInputDeviceListener(listener, /* handler= */ null)
                 awaitClose { inputManager.unregisterInputDeviceListener(listener) }
             }
@@ -78,6 +80,16 @@ constructor(
                 replay = 1,
             )
 
+    private val backlightStateListener: Flow<KeyboardBacklightState> = conflatedCallbackFlow {
+        val listener = KeyboardBacklightListener { _, state, isTriggeredByKeyPress ->
+            if (isTriggeredByKeyPress) {
+                sendWithLogging(state)
+            }
+        }
+        inputManager.registerKeyboardBacklightListener(Executor(Runnable::run), listener)
+        awaitClose { inputManager.unregisterKeyboardBacklightListener(listener) }
+    }
+
     override val keyboardConnected: Flow<Boolean> =
         connectedDeviceIds
             .map { it.any { deviceId -> isPhysicalFullKeyboard(deviceId) } }
@@ -85,9 +97,13 @@ constructor(
             .flowOn(backgroundDispatcher)
 
     override val backlight: Flow<BacklightModel> =
-        conflatedCallbackFlow {
-            // TODO(b/268645734) register BacklightListener
-        }
+        backlightStateListener
+            .map { BacklightModel(it.brightnessLevel, it.maxBrightnessLevel) }
+            .flowOn(backgroundDispatcher)
+
+    private fun <T> SendChannel<T>.sendWithLogging(element: T) {
+        trySendWithFailureLogging(element, TAG)
+    }
 
     private fun isPhysicalFullKeyboard(deviceId: Int): Boolean {
         val device = inputManager.getInputDevice(deviceId)