diff --git a/services/core/java/com/android/server/display/DisplayManagerService.java b/services/core/java/com/android/server/display/DisplayManagerService.java
index 0a4b137fa6cdd..f75f3e1f2f79e 100644
--- a/services/core/java/com/android/server/display/DisplayManagerService.java
+++ b/services/core/java/com/android/server/display/DisplayManagerService.java
@@ -1282,6 +1282,7 @@ public final class DisplayManagerService extends SystemService {
         // this point.
         sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
         scheduleTraversalLocked(false);
+        mPersistentDataStore.saveIfNeeded();
     }
 
     private void handleLogicalDisplayFrameRateOverridesChangedLocked(
@@ -2884,6 +2885,7 @@ public final class DisplayManagerService extends SystemService {
                     if (dpc != null) {
                         dpc.putScreenBrightnessSetting(brightness);
                     }
+                    mPersistentDataStore.saveIfNeeded();
                 }
             } finally {
                 Binder.restoreCallingIdentity(token);