diff --git a/libs/dumputils/dump_utils.cpp b/libs/dumputils/dump_utils.cpp
index a6585c5..067ce17 100644
--- a/libs/dumputils/dump_utils.cpp
+++ b/libs/dumputils/dump_utils.cpp
@@ -208,5 +208,5 @@
     cmdline = std::string(cmdline.c_str());
 
     return cmdline == "zygote" || cmdline == "zygote64" || cmdline == "usap32" ||
-            cmdline == "usap64";
+            cmdline == "usap64" || cmdline == "webview_zygote";
 }
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index 67a226e..c9c0143 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -155,6 +155,7 @@
         "DisplayRenderArea.cpp",
         "Effects/Daltonizer.cpp",
         "EventLog/EventLog.cpp",
+        "FrontEnd/TransactionHandler.cpp",
         "FlagManager.cpp",
         "FpsReporter.cpp",
         "FrameTracer/FrameTracer.cpp",
@@ -193,7 +194,6 @@
         "Tracing/TransactionTracing.cpp",
         "Tracing/TransactionProtoParser.cpp",
         "TransactionCallbackInvoker.cpp",
-        "TransactionHandler.cpp",
         "TunnelModeEnabledReporter.cpp",
     ],
 }
diff --git a/services/surfaceflinger/TransactionHandler.cpp b/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
similarity index 100%
rename from services/surfaceflinger/TransactionHandler.cpp
rename to services/surfaceflinger/FrontEnd/TransactionHandler.cpp
diff --git a/services/surfaceflinger/TransactionHandler.h b/services/surfaceflinger/FrontEnd/TransactionHandler.h
similarity index 100%
rename from services/surfaceflinger/TransactionHandler.h
rename to services/surfaceflinger/FrontEnd/TransactionHandler.h
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index b517568..d4660ff 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1294,7 +1294,6 @@
     if (fps) {
         surfaceFrame->setRenderRate(*fps);
     }
-    // TODO(b/178542907): Implement onSurfaceFrameCreated for BQLayer as well.
     onSurfaceFrameCreated(surfaceFrame);
     return surfaceFrame;
 }
@@ -2703,6 +2702,10 @@
 
 void Layer::onSurfaceFrameCreated(
         const std::shared_ptr<frametimeline::SurfaceFrame>& surfaceFrame) {
+    if (!hasBufferOrSidebandStreamInDrawing()) {
+        return;
+    }
+
     while (mPendingJankClassifications.size() >= kPendingClassificationMaxSurfaceFrames) {
         // Too many SurfaceFrames pending classification. The front of the deque is probably not
         // tracked by FrameTimeline and will never be presented. This will only result in a memory
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 7e46d1c..b2d7cbc 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -1082,6 +1082,10 @@
         return ((mSidebandStream != nullptr) || (mBufferInfo.mBuffer != nullptr));
     }
 
+    bool hasBufferOrSidebandStreamInDrawing() const {
+        return ((mDrawingState.sidebandStream != nullptr) || (mDrawingState.buffer != nullptr));
+    }
+
     bool hasSomethingToDraw() const { return hasEffect() || hasBufferOrSidebandStream(); }
 
     void updateChildrenSnapshots(bool updateGeometry);
@@ -1157,7 +1161,7 @@
 
     std::deque<std::shared_ptr<android::frametimeline::SurfaceFrame>> mPendingJankClassifications;
     // An upper bound on the number of SurfaceFrames in the pending classifications deque.
-    static constexpr int kPendingClassificationMaxSurfaceFrames = 25;
+    static constexpr int kPendingClassificationMaxSurfaceFrames = 50;
 
     const std::string mBlastTransactionName{"BufferTX - " + mName};
     // This integer is incremented everytime a buffer arrives at the server for this layer,
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index f3148cb..6cd57c4 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -7764,7 +7764,7 @@
     IPCThreadState* ipc = IPCThreadState::self();
     const int pid = ipc->getCallingPid();
     const int uid = ipc->getCallingUid();
-    if ((uid != AID_GRAPHICS) &&
+    if ((uid != AID_GRAPHICS) && (uid != AID_SYSTEM) &&
         !PermissionCache::checkPermission(sControlDisplayBrightness, pid, uid)) {
         ALOGE("Permission Denial: can't control brightness pid=%d, uid=%d", pid, uid);
         return PERMISSION_DENIED;
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index d403f47..674f21f 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -65,6 +65,7 @@
 #include "DisplayIdGenerator.h"
 #include "Effects/Daltonizer.h"
 #include "FlagManager.h"
+#include "FrontEnd/TransactionHandler.h"
 #include "LayerVector.h"
 #include "Scheduler/RefreshRateConfigs.h"
 #include "Scheduler/RefreshRateStats.h"
@@ -75,7 +76,6 @@
 #include "Tracing/LayerTracing.h"
 #include "Tracing/TransactionTracing.h"
 #include "TransactionCallbackInvoker.h"
-#include "TransactionHandler.h"
 #include "TransactionState.h"
 
 #include <atomic>
diff --git a/services/surfaceflinger/Tracing/tools/main.cpp b/services/surfaceflinger/Tracing/tools/main.cpp
index f3cf42d..9f9ae48 100644
--- a/services/surfaceflinger/Tracing/tools/main.cpp
+++ b/services/surfaceflinger/Tracing/tools/main.cpp
@@ -52,6 +52,10 @@
     ;
     ALOGD("Generating %s...", outputLayersTracePath);
     std::cout << "Generating " << outputLayersTracePath << "\n";
+
+    // sink any log spam from the stubbed surfaceflinger
+    __android_log_set_logger([](const struct __android_log_message* /* log_message */) {});
+
     if (!LayerTraceGenerator().generate(transactionTraceFile, outputLayersTracePath)) {
         std::cout << "Error: Failed to generate layers trace " << outputLayersTracePath;
         return -1;
diff --git a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
index db438b7..de84faa 100644
--- a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
@@ -30,8 +30,8 @@
 #include <vector>
 #include <binder/Binder.h>
 
+#include "FrontEnd/TransactionHandler.h"
 #include "TestableSurfaceFlinger.h"
-#include "TransactionHandler.h"
 #include "mock/MockEventThread.h"
 #include "mock/MockVsyncController.h"