diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 7fd7762..af439f7 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -190,9 +190,15 @@
 }
 
 void Scheduler::setVsyncPeriod(const nsecs_t period) {
+    std::lock_guard<std::mutex> lock(mHWVsyncLock);
     mPrimaryDispSync->reset();
     mPrimaryDispSync->setPeriod(period);
-    enableHardwareVsync();
+
+    if (!mPrimaryHWVsyncEnabled) {
+        mPrimaryDispSync->beginResync();
+        mEventControlThread->setVsyncEnabled(true);
+        mPrimaryHWVsyncEnabled = true;
+    }
 }
 
 void Scheduler::addResyncSample(const nsecs_t timestamp) {
@@ -228,10 +234,19 @@
     mHWVsyncAvailable = makeAvailable;
 }
 
+bool Scheduler::getHWSyncAvailable() {
+    std::lock_guard<std::mutex> lock(mHWVsyncLock);
+    return mHWVsyncAvailable;
+}
+
 nsecs_t Scheduler::expectedPresentTime() {
     return mPrimaryDispSync->expectedPresentTime();
 }
 
+void Scheduler::dumpPrimaryDispSync(std::string& result) const {
+    mPrimaryDispSync->dump(result);
+}
+
 void Scheduler::addFramePresentTimeForLayer(const nsecs_t framePresentTime, bool isAutoTimestamp,
                                             const std::string layerName) {
     // This is V1 logic. It calculates the average FPS based on the timestamp frequency
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 03f2879..d628e40 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -109,6 +109,8 @@
     void addPresentFence(const std::shared_ptr<FenceTime>& fenceTime);
     void setIgnorePresentFences(bool ignore);
     void makeHWSyncAvailable(bool makeAvailable);
+    // returns HWSyncAvailable flag to SF would enable HW vsync based on this
+    bool getHWSyncAvailable();
     nsecs_t expectedPresentTime();
     // Adds the present time for given layer to the history of present times.
     void addFramePresentTimeForLayer(const nsecs_t framePresentTime, bool isAutoTimestamp,
@@ -122,6 +124,9 @@
     // Returns relevant information about Scheduler for dumpsys purposes.
     std::string doDump();
 
+    // calls DispSync::dump() on primary disp sync
+    void dumpPrimaryDispSync(std::string& result) const;
+
 protected:
     virtual std::unique_ptr<EventThread> makeEventThread(
             const char* connectionName, DispSync* dispSync, int64_t phaseOffsetNs,
diff --git a/services/surfaceflinger/Scheduler/VSyncModulator.h b/services/surfaceflinger/Scheduler/VSyncModulator.h
index d7ec733..0bf3ceb 100644
--- a/services/surfaceflinger/Scheduler/VSyncModulator.h
+++ b/services/surfaceflinger/Scheduler/VSyncModulator.h
@@ -124,7 +124,7 @@
             changed = true;
         }
         if (desired.app != current.app) {
-            if (mSfConnectionHandle != nullptr) {
+            if (mAppConnectionHandle != nullptr) {
                 mScheduler->setPhaseOffset(mAppConnectionHandle, desired.app);
             } else {
                 mAppEventThread->setPhaseOffset(desired.app);
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 7fd8a07..c127609 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -636,11 +636,11 @@
                 scheduler::RefreshRateConfigs::RefreshRateType::PERFORMANCE);
 
         mAppConnectionHandle =
-                mScheduler->createConnection("appConnection", mPhaseOffsets->getCurrentAppOffset(),
+                mScheduler->createConnection("app", mPhaseOffsets->getCurrentAppOffset(),
                                              resyncCallback,
                                              impl::EventThread::InterceptVSyncsCallback());
         mSfConnectionHandle =
-                mScheduler->createConnection("sfConnection", mPhaseOffsets->getCurrentSfOffset(),
+                mScheduler->createConnection("sf", mPhaseOffsets->getCurrentSfOffset(),
                                              resyncCallback, [this](nsecs_t timestamp) {
                                                  mInterceptor->saveVSyncEvent(timestamp);
                                              });
@@ -1408,17 +1408,23 @@
 
 void SurfaceFlinger::resyncToHardwareVsync(bool makeAvailable, nsecs_t period) {
     Mutex::Autolock _l(mHWVsyncLock);
-
-    if (makeAvailable) {
-        mHWVsyncAvailable = true;
-        // TODO(b/113612090): This is silly, but necessary evil until we turn on the flag for good.
-        if (mUseScheduler) {
+    // TODO(b/113612090): This is silly, but necessary evil until we turn on the flag for good.
+    if (mUseScheduler) {
+        if (makeAvailable) {
             mScheduler->makeHWSyncAvailable(true);
+        } else if (!mScheduler->getHWSyncAvailable()) {
+            // Hardware vsync is not currently available, so abort the resync
+            // attempt for now
+            return;
         }
-    } else if (!mHWVsyncAvailable) {
-        // Hardware vsync is not currently available, so abort the resync
-        // attempt for now
-        return;
+    } else {
+        if (makeAvailable) {
+            mHWVsyncAvailable = true;
+        } else if (!mHWVsyncAvailable) {
+            // Hardware vsync is not currently available, so abort the resync
+            // attempt for now
+            return;
+        }
     }
 
     if (period <= 0) {
@@ -4518,7 +4524,13 @@
                 {"--clear-layer-stats"s, dumper([this](std::string&) { mLayerStats.clear(); })},
                 {"--disable-layer-stats"s, dumper([this](std::string&) { mLayerStats.disable(); })},
                 {"--display-id"s, dumper(&SurfaceFlinger::dumpDisplayIdentificationData)},
-                {"--dispsync"s, dumper([this](std::string& s) { mPrimaryDispSync->dump(s); })},
+                {"--dispsync"s, dumper([this](std::string& s) {
+                     if (mUseScheduler) {
+                         mScheduler->dumpPrimaryDispSync(s);
+                     } else {
+                         mPrimaryDispSync->dump(s);
+                     }
+                 })},
                 {"--dump-layer-stats"s, dumper([this](std::string& s) { mLayerStats.dump(s); })},
                 {"--enable-layer-stats"s, dumper([this](std::string&) { mLayerStats.enable(); })},
                 {"--frame-composition"s, dumper(&SurfaceFlinger::dumpFrameCompositionInfo)},