diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index f94afda..8ba9526 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -94,7 +94,6 @@
 using android::os::dumpstate::CommandOptions;
 using android::os::dumpstate::DumpFileToFd;
 using android::os::dumpstate::DumpstateSectionReporter;
-using android::os::dumpstate::GetPidByName;
 using android::os::dumpstate::PropertiesHelper;
 
 typedef Dumpstate::ConsentCallback::ConsentResult UserConsentResult;
@@ -421,108 +420,6 @@
     closedir(d);
 }
 
-
-
-// dump anrd's trace and add to the zip file.
-// 1. check if anrd is running on this device.
-// 2. send a SIGUSR1 to its pid which will dump anrd's trace.
-// 3. wait until the trace generation completes and add to the zip file.
-static bool dump_anrd_trace() {
-    int pid;
-    char buf[50], path[PATH_MAX];
-    struct dirent *trace;
-    struct stat st;
-    DIR *trace_dir;
-    int retry = 5;
-    long max_ctime = 0, old_mtime;
-    long long cur_size = 0;
-    const char *trace_path = "/data/misc/anrd/";
-
-    if (!ds.IsZipping()) {
-        MYLOGE("Not dumping anrd trace because it's not a zipped bugreport\n");
-        return false;
-    }
-
-    // find anrd's pid if it is running.
-    pid = GetPidByName("/system/bin/anrd");
-
-    if (pid > 0) {
-        if (stat(trace_path, &st) == 0) {
-            old_mtime = st.st_mtime;
-        } else {
-            MYLOGE("Failed to find: %s\n", trace_path);
-            return false;
-        }
-
-        // send SIGUSR1 to the anrd to generate a trace.
-        sprintf(buf, "%d", pid);
-        if (RunCommand("ANRD_DUMP", {"kill", "-SIGUSR1", buf},
-                       CommandOptions::WithTimeout(1).Build())) {
-            MYLOGE("anrd signal timed out. Please manually collect trace\n");
-            return false;
-        }
-
-        while (retry-- > 0 && old_mtime == st.st_mtime) {
-            sleep(1);
-            stat(trace_path, &st);
-        }
-
-        if (retry < 0 && old_mtime == st.st_mtime) {
-            MYLOGE("Failed to stat %s or trace creation timeout\n", trace_path);
-            return false;
-        }
-
-        // identify the trace file by its creation time.
-        if (!(trace_dir = opendir(trace_path))) {
-            MYLOGE("Can't open trace file under %s\n", trace_path);
-        }
-        while ((trace = readdir(trace_dir))) {
-            if (strcmp(trace->d_name, ".") == 0
-                    || strcmp(trace->d_name, "..") == 0) {
-                continue;
-            }
-            sprintf(path, "%s%s", trace_path, trace->d_name);
-            if (stat(path, &st) == 0) {
-                if (st.st_ctime > max_ctime) {
-                    max_ctime = st.st_ctime;
-                    sprintf(buf, "%s", trace->d_name);
-                }
-            }
-        }
-        closedir(trace_dir);
-
-        // Wait until the dump completes by checking the size of the trace.
-        if (max_ctime > 0) {
-            sprintf(path, "%s%s", trace_path, buf);
-            while(true) {
-                sleep(1);
-                if (stat(path, &st) == 0) {
-                    if (st.st_size == cur_size) {
-                        break;
-                    } else if (st.st_size > cur_size) {
-                        cur_size = st.st_size;
-                    } else {
-                        return false;
-                    }
-                } else {
-                    MYLOGE("Cant stat() %s anymore\n", path);
-                    return false;
-                }
-            }
-            // Add to the zip file.
-            if (!ds.AddZipEntry("anrd_trace.txt", path)) {
-                MYLOGE("Unable to add anrd_trace file %s to zip file\n", path);
-            } else {
-                android::os::UnlinkAndLogOnError(path);
-                return true;
-            }
-        } else {
-            MYLOGE("Can't stats any trace file under %s\n", trace_path);
-        }
-    }
-    return false;
-}
-
 static bool skip_not_stat(const char *path) {
     static const char stat[] = "/stat";
     size_t len = strlen(path);
@@ -1380,7 +1277,7 @@
     /* Dump Bluetooth HCI logs */
     ds.AddDir("/data/misc/bluetooth/logs", true);
 
-    if (!ds.do_early_screenshot_) {
+    if (ds.options_->do_fb && !ds.do_early_screenshot_) {
         MYLOGI("taking late screenshot\n");
         ds.TakeScreenshot();
     }
@@ -1538,9 +1435,6 @@
  * with the caller.
  */
 static Dumpstate::RunStatus DumpstateDefault() {
-    // Try to dump anrd trace if the daemon is running.
-    dump_anrd_trace();
-
     // Invoking the following dumpsys calls before DumpTraces() to try and
     // keep the system stats as close to its initial state as possible.
     RUN_SLOW_FUNCTION_WITH_CONSENT_CHECK(RunDumpsysCritical);
@@ -2625,13 +2519,8 @@
     }
 
     if (options_->do_fb && do_early_screenshot_) {
-        if (screenshot_path_.empty()) {
-            // should not have happened
-            MYLOGE("INTERNAL ERROR: skipping early screenshot because path was not set\n");
-        } else {
-            MYLOGI("taking early screenshot\n");
-            TakeScreenshot();
-        }
+        MYLOGI("taking early screenshot\n");
+        TakeScreenshot();
     }
 
     if (options_->do_zip_file && zip_file != nullptr) {
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 3ca6ef5..cae1b46 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -158,18 +158,26 @@
     }
 }
 
-void Layer::onRemovedFromCurrentState() {
-    mRemovedFromCurrentState = true;
+void Layer::removeRelativeZ(const std::vector<Layer*>& layersInTree) {
+    if (mCurrentState.zOrderRelativeOf == nullptr) {
+        return;
+    }
 
-    // the layer is removed from SF mCurrentState to mLayersPendingRemoval
-    if (mCurrentState.zOrderRelativeOf != nullptr) {
-        sp<Layer> strongRelative = mCurrentState.zOrderRelativeOf.promote();
-        if (strongRelative != nullptr) {
-            strongRelative->removeZOrderRelative(this);
-            mFlinger->setTransactionFlags(eTraversalNeeded);
-        }
+    sp<Layer> strongRelative = mCurrentState.zOrderRelativeOf.promote();
+    if (strongRelative == nullptr) {
+        setZOrderRelativeOf(nullptr);
+        return;
+    }
+
+    if (!std::binary_search(layersInTree.begin(), layersInTree.end(), strongRelative.get())) {
+        strongRelative->removeZOrderRelative(this);
+        mFlinger->setTransactionFlags(eTraversalNeeded);
         setZOrderRelativeOf(nullptr);
     }
+}
+
+void Layer::removeFromCurrentState() {
+    mRemovedFromCurrentState = true;
 
     // Since we are no longer reachable from CurrentState SurfaceFlinger
     // will no longer invoke doTransaction for us, and so we will
@@ -186,13 +194,18 @@
     mLocalSyncPoints.clear();
     }
 
-    for (const auto& child : mCurrentChildren) {
-        child->onRemovedFromCurrentState();
-    }
-
     mFlinger->markLayerPendingRemovalLocked(this);
 }
 
+void Layer::onRemovedFromCurrentState() {
+    auto layersInTree = getLayersInTree(LayerVector::StateSet::Current);
+    std::sort(layersInTree.begin(), layersInTree.end());
+    for (const auto& layer : layersInTree) {
+        layer->removeFromCurrentState();
+        layer->removeRelativeZ(layersInTree);
+    }
+}
+
 void Layer::addToCurrentState() {
     mRemovedFromCurrentState = false;
 
@@ -415,7 +428,7 @@
         auto& parentState = parent->getDrawingState();
         const int parentType = parentState.metadata.getInt32(METADATA_WINDOW_TYPE, 0);
         const int parentAppId = parentState.metadata.getInt32(METADATA_OWNER_UID, 0);
-        if (parentType >= 0 || parentAppId >= 0) {
+        if (parentType > 0 && parentAppId > 0) {
             type = parentType;
             appId = parentAppId;
         }
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index bbbc5b0..5c55111 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -571,6 +571,17 @@
     virtual bool isBufferLatched() const { return false; }
 
     /*
+     * Remove relative z for the layer if its relative parent is not part of the
+     * provided layer tree.
+     */
+    void removeRelativeZ(const std::vector<Layer*>& layersInTree);
+
+    /*
+     * Remove from current state and mark for removal.
+     */
+    void removeFromCurrentState();
+
+    /*
      * called with the state lock from a binder thread when the layer is
      * removed from the current list to the pending removal list
      */
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 50fabe3..87c1bf9 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1530,10 +1530,25 @@
 
 void SurfaceFlinger::setPrimaryVsyncEnabled(bool enabled) {
     ATRACE_CALL();
-    Mutex::Autolock lock(mStateLock);
+
+    // Enable / Disable HWVsync from the main thread to avoid race conditions with
+    // display power state.
+    postMessageAsync(new LambdaMessage(
+            [=]() NO_THREAD_SAFETY_ANALYSIS { setPrimaryVsyncEnabledInternal(enabled); }));
+}
+
+void SurfaceFlinger::setPrimaryVsyncEnabledInternal(bool enabled) {
+    ATRACE_CALL();
+
     if (const auto displayId = getInternalDisplayIdLocked()) {
-        getHwComposer().setVsyncEnabled(*displayId,
-                                        enabled ? HWC2::Vsync::Enable : HWC2::Vsync::Disable);
+        sp<DisplayDevice> display = getDefaultDisplayDeviceLocked();
+        if (display && display->isPoweredOn()) {
+            getHwComposer().setVsyncEnabled(*displayId,
+                                            enabled ? HWC2::Vsync::Enable : HWC2::Vsync::Disable);
+        } else {
+            // Cache the latest vsync state and apply it when screen is on again
+            mEnableHWVsyncScreenOn = enabled;
+        }
     }
 }
 
@@ -4431,6 +4446,11 @@
         // Turn on the display
         getHwComposer().setPowerMode(*displayId, mode);
         if (display->isPrimary() && mode != HWC_POWER_MODE_DOZE_SUSPEND) {
+            if (mEnableHWVsyncScreenOn) {
+                setPrimaryVsyncEnabledInternal(mEnableHWVsyncScreenOn);
+                mEnableHWVsyncScreenOn = false;
+            }
+
             mScheduler->onScreenAcquired(mAppConnectionHandle);
             mScheduler->resyncToHardwareVsync(true, getVsyncPeriod());
         }
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 74fefa7..46fc4d2 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -293,6 +293,9 @@
     // TODO: this should be made accessible only to EventThread
     void setPrimaryVsyncEnabled(bool enabled);
 
+    // main thread function to enable/disable h/w composer event
+    void setPrimaryVsyncEnabledInternal(bool enabled);
+
     // called on the main thread by MessageQueue when an internal message
     // is received
     // TODO: this should be made accessible only to MessageQueue
@@ -1168,6 +1171,9 @@
     // The Layer pointer is removed from the set when the destructor is called so there shouldn't
     // be any issues with a raw pointer referencing an invalid object.
     std::unordered_set<Layer*> mOffscreenLayers;
+
+    // Flag to indicate whether to re-enable HWVsync when screen is on
+    bool mEnableHWVsyncScreenOn = false;
 };
 
 } // namespace android
diff --git a/services/surfaceflinger/tests/SurfaceFlinger_test.filter b/services/surfaceflinger/tests/SurfaceFlinger_test.filter
index 5ebae1e..6b4634a 100644
--- a/services/surfaceflinger/tests/SurfaceFlinger_test.filter
+++ b/services/surfaceflinger/tests/SurfaceFlinger_test.filter
@@ -1,5 +1,5 @@
 {
         "presubmit": {
-            "filter": "CredentialsTest.*:SurfaceFlingerStress.*:SurfaceInterceptorTest.*:LayerTransactionTest.*:LayerTypeTransactionTest.*:LayerUpdateTest.*:GeometryLatchingTest.*:CropLatchingTest.*:ChildLayerTest.*:ScreenCaptureTest.*:ScreenCaptureChildOnlyTest.*:DereferenceSurfaceControlTest.*:BoundlessLayerTest.*:MultiDisplayLayerBoundsTest.*:InvalidHandleTest.*:VirtualDisplayTest.*"
+            "filter": "CredentialsTest.*:SurfaceFlingerStress.*:SurfaceInterceptorTest.*:LayerTransactionTest.*:LayerTypeTransactionTest.*:LayerUpdateTest.*:GeometryLatchingTest.*:CropLatchingTest.*:ChildLayerTest.*:ScreenCaptureTest.*:ScreenCaptureChildOnlyTest.*:DereferenceSurfaceControlTest.*:BoundlessLayerTest.*:MultiDisplayLayerBoundsTest.*:InvalidHandleTest.*:VirtualDisplayTest.*:RelativeZTest.*"
         }
 }
diff --git a/services/surfaceflinger/tests/Transaction_test.cpp b/services/surfaceflinger/tests/Transaction_test.cpp
index 62db5ec..f83b3ea 100644
--- a/services/surfaceflinger/tests/Transaction_test.cpp
+++ b/services/surfaceflinger/tests/Transaction_test.cpp
@@ -385,6 +385,18 @@
         return createLayer(mClient, name, width, height, flags, parent);
     }
 
+    sp<SurfaceControl> createColorLayer(const char* name, const Color& color,
+                                        SurfaceControl* parent = nullptr) {
+        auto colorLayer = createSurface(mClient, name, 0 /* buffer width */, 0 /* buffer height */,
+                                        PIXEL_FORMAT_RGBA_8888,
+                                        ISurfaceComposerClient::eFXSurfaceColor, parent);
+        asTransaction([&](Transaction& t) {
+            t.setColor(colorLayer, half3{color.r / 255.0f, color.g / 255.0f, color.b / 255.0f});
+            t.setAlpha(colorLayer, color.a / 255.0f);
+        });
+        return colorLayer;
+    }
+
     ANativeWindow_Buffer getBufferQueueLayerBuffer(const sp<SurfaceControl>& layer) {
         // wait for previous transactions (such as setSize) to complete
         Transaction().apply(true);
@@ -5875,4 +5887,126 @@
                 allowedConfigs.end());
 }
 
+class RelativeZTest : public LayerTransactionTest {
+protected:
+    virtual void SetUp() {
+        LayerTransactionTest::SetUp();
+        ASSERT_EQ(NO_ERROR, mClient->initCheck());
+
+        const auto display = SurfaceComposerClient::getInternalDisplayToken();
+        ASSERT_FALSE(display == nullptr);
+
+        // Back layer
+        mBackgroundLayer = createColorLayer("Background layer", Color::RED);
+
+        // Front layer
+        mForegroundLayer = createColorLayer("Foreground layer", Color::GREEN);
+
+        asTransaction([&](Transaction& t) {
+            t.setDisplayLayerStack(display, 0);
+            t.setLayer(mBackgroundLayer, INT32_MAX - 2).show(mBackgroundLayer);
+            t.setLayer(mForegroundLayer, INT32_MAX - 1).show(mForegroundLayer);
+        });
+    }
+
+    virtual void TearDown() {
+        LayerTransactionTest::TearDown();
+        mBackgroundLayer = 0;
+        mForegroundLayer = 0;
+    }
+
+    sp<SurfaceControl> mBackgroundLayer;
+    sp<SurfaceControl> mForegroundLayer;
+};
+
+// When a layer is reparented offscreen, remove relative z order if the relative parent
+// is still onscreen so that the layer is not drawn.
+TEST_F(RelativeZTest, LayerRemoved) {
+    std::unique_ptr<ScreenCapture> sc;
+
+    // Background layer (RED)
+    //   Child layer (WHITE) (relative to foregroud layer)
+    // Foregroud layer (GREEN)
+    sp<SurfaceControl> childLayer =
+            createColorLayer("Child layer", Color::BLUE, mBackgroundLayer.get());
+
+    Transaction{}
+            .setRelativeLayer(childLayer, mForegroundLayer->getHandle(), 1)
+            .show(childLayer)
+            .apply();
+
+    {
+        // The childLayer should be in front of the FG control.
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(1, 1, Color::BLUE.r, Color::BLUE.g, Color::BLUE.b);
+    }
+
+    // Background layer (RED)
+    // Foregroud layer (GREEN)
+    Transaction{}.reparent(childLayer, nullptr).apply();
+
+    // Background layer (RED)
+    //   Child layer (WHITE)
+    // Foregroud layer (GREEN)
+    Transaction{}.reparent(childLayer, mBackgroundLayer->getHandle()).apply();
+
+    {
+        // The relative z info for child layer should be reset, leaving FG control on top.
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(1, 1, Color::GREEN.r, Color::GREEN.g, Color::GREEN.b);
+    }
+}
+
+// When a layer is reparented offscreen, preseve relative z order if the relative parent
+// is also offscreen. Regression test b/132613412
+TEST_F(RelativeZTest, LayerRemovedOffscreenRelativeParent) {
+    std::unique_ptr<ScreenCapture> sc;
+
+    // Background layer (RED)
+    // Foregroud layer (GREEN)
+    //   child level 1 (WHITE)
+    //     child level 2a (BLUE)
+    //       child level 3 (GREEN) (relative to child level 2b)
+    //     child level 2b (BLACK)
+    sp<SurfaceControl> childLevel1 =
+            createColorLayer("child level 1", Color::WHITE, mForegroundLayer.get());
+    sp<SurfaceControl> childLevel2a =
+            createColorLayer("child level 2a", Color::BLUE, childLevel1.get());
+    sp<SurfaceControl> childLevel2b =
+            createColorLayer("child level 2b", Color::BLACK, childLevel1.get());
+    sp<SurfaceControl> childLevel3 =
+            createColorLayer("child level 3", Color::GREEN, childLevel2a.get());
+
+    Transaction{}
+            .setRelativeLayer(childLevel3, childLevel2b->getHandle(), 1)
+            .show(childLevel2a)
+            .show(childLevel2b)
+            .show(childLevel3)
+            .apply();
+
+    {
+        // The childLevel3 should be in front of childLevel2b.
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(1, 1, Color::GREEN.r, Color::GREEN.g, Color::GREEN.b);
+    }
+
+    // Background layer (RED)
+    // Foregroud layer (GREEN)
+    Transaction{}.reparent(childLevel1, nullptr).apply();
+
+    // Background layer (RED)
+    // Foregroud layer (GREEN)
+    //   child level 1 (WHITE)
+    //     child level 2 back (BLUE)
+    //       child level 3 (GREEN) (relative to child level 2b)
+    //     child level 2 front (BLACK)
+    Transaction{}.reparent(childLevel1, mForegroundLayer->getHandle()).apply();
+
+    {
+        // Nothing should change at this point since relative z info was preserved.
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(1, 1, Color::GREEN.r, Color::GREEN.g, Color::GREEN.b);
+    }
+}
+
 } // namespace android