diff --git a/services/core/java/com/android/server/wm/ActivityStack.java b/services/core/java/com/android/server/wm/ActivityStack.java
index cd508d0e18608..959aedcd1e4a3 100644
--- a/services/core/java/com/android/server/wm/ActivityStack.java
+++ b/services/core/java/com/android/server/wm/ActivityStack.java
@@ -1990,7 +1990,7 @@ class ActivityStack extends Task {
         return mRootWindowContainer.resumeHomeActivity(prev, reason, getDisplayArea());
     }
 
-    void startActivityLocked(ActivityRecord r, ActivityRecord focusedTopActivity,
+    void startActivityLocked(ActivityRecord r, @Nullable ActivityRecord focusedTopActivity,
             boolean newTask, boolean keepCurTransition, ActivityOptions options) {
         Task rTask = r.getTask();
         final boolean allowMoveToFront = options == null || !options.getAvoidMoveToFront();
@@ -3336,7 +3336,11 @@ class ActivityStack extends Task {
         // Do not sleep activities in this stack if we're marked as focused and the keyguard
         // is in the process of going away.
         if (isFocusedStackOnDisplay()
-                && mStackSupervisor.getKeyguardController().isKeyguardGoingAway()) {
+                && mStackSupervisor.getKeyguardController().isKeyguardGoingAway()
+                // Avoid resuming activities on secondary displays since we don't want bubble
+                // activities to be resumed while bubble is still collapsed.
+                // TODO(b/113840485): Having keyguard going away state for secondary displays.
+                && display.isDefaultDisplay) {
             return false;
         }
 
diff --git a/services/core/java/com/android/server/wm/ActivityStarter.java b/services/core/java/com/android/server/wm/ActivityStarter.java
index b869eb56f536a..a78232c05397d 100644
--- a/services/core/java/com/android/server/wm/ActivityStarter.java
+++ b/services/core/java/com/android/server/wm/ActivityStarter.java
@@ -1697,8 +1697,9 @@ class ActivityStarter {
         mRootWindowContainer.sendPowerHintForLaunchStartIfNeeded(
                 false /* forceSend */, mStartActivity);
 
-        mTargetStack.startActivityLocked(mStartActivity, topStack.getTopNonFinishingActivity(),
-                newTask, mKeepCurTransition, mOptions);
+        mTargetStack.startActivityLocked(mStartActivity,
+                topStack != null ? topStack.getTopNonFinishingActivity() : null, newTask,
+                mKeepCurTransition, mOptions);
         if (mDoResume) {
             final ActivityRecord topTaskActivity =
                     mStartActivity.getTask().topRunningActivityLocked();
diff --git a/services/core/java/com/android/server/wm/RootWindowContainer.java b/services/core/java/com/android/server/wm/RootWindowContainer.java
index 049e46fb6cef8..f57c9164a6102 100644
--- a/services/core/java/com/android/server/wm/RootWindowContainer.java
+++ b/services/core/java/com/android/server/wm/RootWindowContainer.java
@@ -2305,10 +2305,6 @@ class RootWindowContainer extends WindowContainer<DisplayContent>
 
         for (int displayNdx = getChildCount() - 1; displayNdx >= 0; --displayNdx) {
             final DisplayContent display = getChildAt(displayNdx);
-            if (display.shouldSleep()) {
-                continue;
-            }
-
             boolean resumedOnDisplay = false;
             for (int tdaNdx = display.getTaskDisplayAreaCount() - 1; tdaNdx >= 0; --tdaNdx) {
                 final TaskDisplayArea taskDisplayArea = display.getTaskDisplayAreaAt(tdaNdx);
diff --git a/services/tests/wmtests/src/com/android/server/wm/ActivityStackTests.java b/services/tests/wmtests/src/com/android/server/wm/ActivityStackTests.java
index 1b42a0466cf73..e898c25733159 100644
--- a/services/tests/wmtests/src/com/android/server/wm/ActivityStackTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/ActivityStackTests.java
@@ -1206,19 +1206,22 @@ public class ActivityStackTests extends ActivityTestsBase {
     @Test
     public void testShouldSleepActivities() {
         // When focused activity and keyguard is going away, we should not sleep regardless
-        // of the display state
+        // of the display state, but keyguard-going-away should only take effects on default
+        // display since there is no keyguard on secondary displays (yet).
         verifyShouldSleepActivities(true /* focusedStack */, true /*keyguardGoingAway*/,
-                true /* displaySleeping */, false /* expected*/);
+                true /* displaySleeping */, true /* isDefaultDisplay */, false /* expected */);
+        verifyShouldSleepActivities(true /* focusedStack */, true /*keyguardGoingAway*/,
+                true /* displaySleeping */, false /* isDefaultDisplay */, true /* expected */);
 
         // When not the focused stack, defer to display sleeping state.
         verifyShouldSleepActivities(false /* focusedStack */, true /*keyguardGoingAway*/,
-                true /* displaySleeping */, true /* expected*/);
+                true /* displaySleeping */, true /* isDefaultDisplay */, true /* expected */);
 
         // If keyguard is going away, defer to the display sleeping state.
         verifyShouldSleepActivities(true /* focusedStack */, false /*keyguardGoingAway*/,
-                true /* displaySleeping */, true /* expected*/);
+                true /* displaySleeping */, true /* isDefaultDisplay */, true /* expected */);
         verifyShouldSleepActivities(true /* focusedStack */, false /*keyguardGoingAway*/,
-                false /* displaySleeping */, false /* expected*/);
+                false /* displaySleeping */, true /* isDefaultDisplay */, false /* expected */);
     }
 
     @Test
@@ -1428,9 +1431,11 @@ public class ActivityStackTests extends ActivityTestsBase {
     }
 
     private void verifyShouldSleepActivities(boolean focusedStack,
-            boolean keyguardGoingAway, boolean displaySleeping, boolean expected) {
+            boolean keyguardGoingAway, boolean displaySleeping, boolean isDefaultDisplay,
+            boolean expected) {
         final DisplayContent display = mock(DisplayContent.class);
         final KeyguardController keyguardController = mSupervisor.getKeyguardController();
+        display.isDefaultDisplay = isDefaultDisplay;
 
         doReturn(display).when(mStack).getDisplay();
         doReturn(keyguardGoingAway).when(keyguardController).isKeyguardGoingAway();
diff --git a/services/tests/wmtests/src/com/android/server/wm/RootActivityContainerTests.java b/services/tests/wmtests/src/com/android/server/wm/RootActivityContainerTests.java
index c848736a64c29..51db099676b03 100644
--- a/services/tests/wmtests/src/com/android/server/wm/RootActivityContainerTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/RootActivityContainerTests.java
@@ -896,24 +896,6 @@ public class RootActivityContainerTests extends ActivityTestsBase {
         assertEquals(taskDisplayArea.getTopStack(), taskDisplayArea.getRootHomeTask());
     }
 
-    @Test
-    public void testResumeFocusedStackOnSleepingDisplay() {
-        // Create an activity on secondary display.
-        final TestDisplayContent secondDisplay = addNewDisplayContentAt(
-                DisplayContent.POSITION_TOP);
-        final ActivityStack stack = secondDisplay.getDefaultTaskDisplayArea()
-                .createStack(WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, true /* onTop */);
-        final ActivityRecord activity = new ActivityBuilder(mService).setStack(stack).build();
-        spyOn(activity);
-        spyOn(stack);
-
-        // Cannot resumed activities on secondary display if the display should sleep.
-        doReturn(true).when(secondDisplay).shouldSleep();
-        mRootWindowContainer.resumeFocusedStacksTopActivities();
-        verify(stack, never()).resumeTopActivityUncheckedLocked(any(), any());
-        verify(activity, never()).makeActiveIfNeeded(any());
-    }
-
     /**
      * Mock {@link RootWindowContainer#resolveHomeActivity} for returning consistent activity
      * info for test cases.