diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index bcad6ac..9c7bd99 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -5804,12 +5804,15 @@
         }
 
         getHwComposer().setPowerMode(displayId, mode);
-        if (displayId == mActiveDisplayId && mode != hal::PowerMode::DOZE_SUSPEND) {
+        if (mode != hal::PowerMode::DOZE_SUSPEND &&
+            (displayId == mActiveDisplayId || FlagManager::getInstance().multithreaded_present())) {
             const bool enable =
                     mScheduler->getVsyncSchedule(displayId)->getPendingHardwareVsyncState();
             requestHardwareVsync(displayId, enable);
 
-            mScheduler->enableSyntheticVsync(false);
+            if (displayId == mActiveDisplayId) {
+                mScheduler->enableSyntheticVsync(false);
+            }
 
             constexpr bool kAllowToEnable = true;
             mScheduler->resyncToHardwareVsync(displayId, kAllowToEnable, activeMode.get());
@@ -5818,8 +5821,8 @@
         mVisibleRegionsDirty = true;
         scheduleComposite(FrameHint::kActive);
     } else if (mode == hal::PowerMode::OFF) {
+        const bool currentModeNotDozeSuspend = (*currentModeOpt != hal::PowerMode::DOZE_SUSPEND);
         // Turn off the display
-
         if (displayId == mActiveDisplayId) {
             if (const auto display = getActivatableDisplay()) {
                 onActiveDisplayChangedLocked(activeDisplay.get(), *display);
@@ -5833,14 +5836,24 @@
                           strerror(errno));
                 }
 
-                if (*currentModeOpt != hal::PowerMode::DOZE_SUSPEND) {
-                    mScheduler->disableHardwareVsync(displayId, true);
+                if (currentModeNotDozeSuspend) {
+                    if (!FlagManager::getInstance().multithreaded_present()) {
+                        mScheduler->disableHardwareVsync(displayId, true);
+                    }
                     mScheduler->enableSyntheticVsync();
                 }
             }
         }
+        if (currentModeNotDozeSuspend && FlagManager::getInstance().multithreaded_present()) {
+            constexpr bool kDisallow = true;
+            mScheduler->disableHardwareVsync(displayId, kDisallow);
+        }
 
-        // Disable VSYNC before turning off the display.
+        // We must disable VSYNC *before* turning off the display. The call to
+        // disableHardwareVsync, above, schedules a task to turn it off after
+        // this method returns. But by that point, the display is OFF, so the
+        // call just updates the pending state, without actually disabling
+        // VSYNC.
         requestHardwareVsync(displayId, false);
         getHwComposer().setPowerMode(displayId, mode);
 
@@ -5849,18 +5862,24 @@
     } else if (mode == hal::PowerMode::DOZE || mode == hal::PowerMode::ON) {
         // Update display while dozing
         getHwComposer().setPowerMode(displayId, mode);
-        if (displayId == mActiveDisplayId && *currentModeOpt == hal::PowerMode::DOZE_SUSPEND) {
-            ALOGI("Force repainting for DOZE_SUSPEND -> DOZE or ON.");
-            mVisibleRegionsDirty = true;
-            scheduleRepaint();
-            mScheduler->enableSyntheticVsync(false);
-            mScheduler->resyncToHardwareVsync(displayId, true /* allowToEnable */,
-                                              activeMode.get());
+        if (*currentModeOpt == hal::PowerMode::DOZE_SUSPEND &&
+            (displayId == mActiveDisplayId || FlagManager::getInstance().multithreaded_present())) {
+            if (displayId == mActiveDisplayId) {
+                ALOGI("Force repainting for DOZE_SUSPEND -> DOZE or ON.");
+                mVisibleRegionsDirty = true;
+                scheduleRepaint();
+                mScheduler->enableSyntheticVsync(false);
+            }
+            constexpr bool kAllowToEnable = true;
+            mScheduler->resyncToHardwareVsync(displayId, kAllowToEnable, activeMode.get());
         }
     } else if (mode == hal::PowerMode::DOZE_SUSPEND) {
         // Leave display going to doze
+        if (displayId == mActiveDisplayId || FlagManager::getInstance().multithreaded_present()) {
+            constexpr bool kDisallow = true;
+            mScheduler->disableHardwareVsync(displayId, kDisallow);
+        }
         if (displayId == mActiveDisplayId) {
-            mScheduler->disableHardwareVsync(displayId, true);
             mScheduler->enableSyntheticVsync();
         }
         getHwComposer().setPowerMode(displayId, mode);