diff --git a/include/binder/CursorWindow.h b/include/binder/CursorWindow.h
index 5d490ed..f0284de 100644
--- a/include/binder/CursorWindow.h
+++ b/include/binder/CursorWindow.h
@@ -80,8 +80,7 @@
 
     ~CursorWindow();
 
-    static status_t create(const String8& name, size_t size, bool localOnly,
-            CursorWindow** outCursorWindow);
+    static status_t create(const String8& name, size_t size, CursorWindow** outCursorWindow);
     static status_t createFromParcel(Parcel* parcel, CursorWindow** outCursorWindow);
 
     status_t writeToParcel(Parcel* parcel);
diff --git a/include/surfaceflinger/ISurfaceComposer.h b/include/surfaceflinger/ISurfaceComposer.h
index e7a33f1..5eb09c7 100644
--- a/include/surfaceflinger/ISurfaceComposer.h
+++ b/include/surfaceflinger/ISurfaceComposer.h
@@ -84,7 +84,11 @@
         eOrientationUnchanged   = 4,
         eOrientationSwapMask    = 0x01
     };
-    
+
+    enum {
+        eSynchronous            = 0x01,
+    };
+
     enum {
         eElectronBeamAnimationOn  = 0x01,
         eElectronBeamAnimationOff = 0x10
@@ -104,7 +108,7 @@
 
     /* open/close transactions. requires ACCESS_SURFACE_FLINGER permission */
     virtual void setTransactionState(const Vector<ComposerState>& state,
-            int orientation) = 0;
+            int orientation, uint32_t flags) = 0;
 
     /* signal that we're done booting.
      * Requires ACCESS_SURFACE_FLINGER permission
@@ -143,8 +147,6 @@
         GET_CBLK,
         SET_TRANSACTION_STATE,
         SET_ORIENTATION,
-        FREEZE_DISPLAY,
-        UNFREEZE_DISPLAY,
         CAPTURE_SCREEN,
         TURN_ELECTRON_BEAM_OFF,
         TURN_ELECTRON_BEAM_ON,
diff --git a/include/surfaceflinger/SurfaceComposerClient.h b/include/surfaceflinger/SurfaceComposerClient.h
index 14e5b23..8226abe 100644
--- a/include/surfaceflinger/SurfaceComposerClient.h
+++ b/include/surfaceflinger/SurfaceComposerClient.h
@@ -112,7 +112,7 @@
     static void openGlobalTransaction();
         
     //! Close a composer transaction on all active SurfaceComposerClients.
-    static void closeGlobalTransaction();
+    static void closeGlobalTransaction(bool synchronous = false);
     
     //! Freeze the specified display but not transactions.
     static status_t freezeDisplay(DisplayID dpy, uint32_t flags = 0);
diff --git a/include/utils/Singleton.h b/include/utils/Singleton.h
index e1ee8eb..a42ce21 100644
--- a/include/utils/Singleton.h
+++ b/include/utils/Singleton.h
@@ -20,12 +20,13 @@
 #include <stdint.h>
 #include <sys/types.h>
 #include <utils/threads.h>
+#include <cutils/compiler.h>
 
 namespace android {
 // ---------------------------------------------------------------------------
 
 template <typename TYPE>
-class Singleton
+class ANDROID_API Singleton
 {
 public:
     static TYPE& getInstance() {
diff --git a/libs/binder/CursorWindow.cpp b/libs/binder/CursorWindow.cpp
index 60681c4..0733378 100644
--- a/libs/binder/CursorWindow.cpp
+++ b/libs/binder/CursorWindow.cpp
@@ -40,11 +40,9 @@
     ::close(mAshmemFd);
 }
 
-status_t CursorWindow::create(const String8& name, size_t size, bool localOnly,
-        CursorWindow** outCursorWindow) {
+status_t CursorWindow::create(const String8& name, size_t size, CursorWindow** outCursorWindow) {
     String8 ashmemName("CursorWindow: ");
     ashmemName.append(name);
-    ashmemName.append(localOnly ? " (local)" : " (remote)");
 
     status_t result;
     int ashmemFd = ashmem_create_region(ashmemName.string(), size);
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index eb90147..86bc62a 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -79,7 +79,7 @@
     }
 
     virtual void setTransactionState(const Vector<ComposerState>& state,
-            int orientation)
+            int orientation, uint32_t flags)
     {
         Parcel data, reply;
         data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
@@ -90,6 +90,7 @@
             b->write(data);
         }
         data.writeInt32(orientation);
+        data.writeInt32(flags);
         remote()->transact(BnSurfaceComposer::SET_TRANSACTION_STATE, data, &reply);
     }
 
@@ -204,7 +205,8 @@
                 state.add(s);
             }
             int orientation = data.readInt32();
-            setTransactionState(state, orientation);
+            uint32_t flags = data.readInt32();
+            setTransactionState(state, orientation, flags);
         } break;
         case BOOT_FINISHED: {
             CHECK_INTERFACE(ISurfaceComposer, data, reply);
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 5f3d608..4ad6c22 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -92,11 +92,14 @@
     mutable Mutex               mLock;
     SortedVector<ComposerState> mStates;
     int                         mOrientation;
+    uint32_t                    mForceSynchronous;
 
     Composer() : Singleton<Composer>(),
-        mOrientation(ISurfaceComposer::eOrientationUnchanged) { }
+        mOrientation(ISurfaceComposer::eOrientationUnchanged),
+        mForceSynchronous(0)
+    { }
 
-    void closeGlobalTransactionImpl();
+    void closeGlobalTransactionImpl(bool synchronous);
 
     layer_state_t* getLayerStateLocked(
             const sp<SurfaceComposerClient>& client, SurfaceID id);
@@ -123,8 +126,8 @@
             uint32_t tint);
     status_t setOrientation(int orientation);
 
-    static void closeGlobalTransaction() {
-        Composer::getInstance().closeGlobalTransactionImpl();
+    static void closeGlobalTransaction(bool synchronous) {
+        Composer::getInstance().closeGlobalTransactionImpl(synchronous);
     }
 };
 
@@ -132,11 +135,12 @@
 
 // ---------------------------------------------------------------------------
 
-void Composer::closeGlobalTransactionImpl() {
+void Composer::closeGlobalTransactionImpl(bool synchronous) {
     sp<ISurfaceComposer> sm(getComposerService());
 
     Vector<ComposerState> transaction;
     int orientation;
+    uint32_t flags = 0;
 
     { // scope for the lock
         Mutex::Autolock _l(mLock);
@@ -145,9 +149,14 @@
 
         orientation = mOrientation;
         mOrientation = ISurfaceComposer::eOrientationUnchanged;
+
+        if (synchronous || mForceSynchronous) {
+            flags |= ISurfaceComposer::eSynchronous;
+        }
+        mForceSynchronous = false;
     }
 
-   sm->setTransactionState(transaction, orientation);
+   sm->setTransactionState(transaction, orientation, flags);
 }
 
 layer_state_t* Composer::getLayerStateLocked(
@@ -188,6 +197,10 @@
     s->what |= ISurfaceComposer::eSizeChanged;
     s->w = w;
     s->h = h;
+
+    // Resizing a surface makes the transaction synchronous.
+    mForceSynchronous = true;
+
     return NO_ERROR;
 }
 
@@ -270,6 +283,10 @@
 status_t Composer::setOrientation(int orientation) {
     Mutex::Autolock _l(mLock);
     mOrientation = orientation;
+
+    // Changing the orientation makes the transaction synchronous.
+    mForceSynchronous = true;
+
     return NO_ERROR;
 }
 
@@ -375,8 +392,8 @@
     // Currently a no-op
 }
 
-void SurfaceComposerClient::closeGlobalTransaction() {
-    Composer::closeGlobalTransaction();
+void SurfaceComposerClient::closeGlobalTransaction(bool synchronous) {
+    Composer::closeGlobalTransaction(synchronous);
 }
 
 // ----------------------------------------------------------------------------
diff --git a/libs/gui/tests/SurfaceTexture_test.cpp b/libs/gui/tests/SurfaceTexture_test.cpp
index b8bc454..5daafd5 100644
--- a/libs/gui/tests/SurfaceTexture_test.cpp
+++ b/libs/gui/tests/SurfaceTexture_test.cpp
@@ -334,7 +334,7 @@
 
 class SurfaceTextureGLTest : public GLTest {
 protected:
-    static const GLint TEX_ID = 123;
+    enum { TEX_ID = 123 };
 
     virtual void SetUp() {
         GLTest::SetUp();
@@ -1438,4 +1438,86 @@
     }
 }
 
+TEST_F(SurfaceTextureGLTest, EglDestroySurfaceUnrefsBuffers) {
+    EGLSurface stcEglSurface = eglCreateWindowSurface(mEglDisplay, mGlConfig,
+            mANW.get(), NULL);
+    ASSERT_EQ(EGL_SUCCESS, eglGetError());
+    ASSERT_NE(EGL_NO_SURFACE, stcEglSurface);
+
+    sp<GraphicBuffer> buffers[3];
+
+    for (int i = 0; i < 3; i++) {
+        // Produce a frame
+        EXPECT_TRUE(eglMakeCurrent(mEglDisplay, stcEglSurface, stcEglSurface,
+                mEglContext));
+        ASSERT_EQ(EGL_SUCCESS, eglGetError());
+        glClear(GL_COLOR_BUFFER_BIT);
+        eglSwapBuffers(mEglDisplay, stcEglSurface);
+
+        // Consume a frame
+        EXPECT_TRUE(eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface,
+                mEglContext));
+        ASSERT_EQ(EGL_SUCCESS, eglGetError());
+        mST->updateTexImage();
+        buffers[i] = mST->getCurrentBuffer();
+    }
+
+    // Destroy the GL texture object to release its ref on buffers[2].
+    GLuint texID = TEX_ID;
+    glDeleteTextures(1, &texID);
+
+    // Destroy the EGLSurface
+    EXPECT_TRUE(eglDestroySurface(mEglDisplay, stcEglSurface));
+    ASSERT_EQ(EGL_SUCCESS, eglGetError());
+
+    // Release the ref that the SurfaceTexture has on buffers[2].
+    mST->abandon();
+
+    EXPECT_EQ(1, buffers[0]->getStrongCount());
+    EXPECT_EQ(1, buffers[1]->getStrongCount());
+    EXPECT_EQ(1, buffers[2]->getStrongCount());
+}
+
+TEST_F(SurfaceTextureGLTest, EglDestroySurfaceAfterAbandonUnrefsBuffers) {
+    EGLSurface stcEglSurface = eglCreateWindowSurface(mEglDisplay, mGlConfig,
+            mANW.get(), NULL);
+    ASSERT_EQ(EGL_SUCCESS, eglGetError());
+    ASSERT_NE(EGL_NO_SURFACE, stcEglSurface);
+
+    sp<GraphicBuffer> buffers[3];
+
+    for (int i = 0; i < 3; i++) {
+        // Produce a frame
+        EXPECT_TRUE(eglMakeCurrent(mEglDisplay, stcEglSurface, stcEglSurface,
+                mEglContext));
+        ASSERT_EQ(EGL_SUCCESS, eglGetError());
+        glClear(GL_COLOR_BUFFER_BIT);
+        EXPECT_TRUE(eglSwapBuffers(mEglDisplay, stcEglSurface));
+        ASSERT_EQ(EGL_SUCCESS, eglGetError());
+
+        // Consume a frame
+        EXPECT_TRUE(eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface,
+                mEglContext));
+        ASSERT_EQ(EGL_SUCCESS, eglGetError());
+        ASSERT_EQ(NO_ERROR, mST->updateTexImage());
+        buffers[i] = mST->getCurrentBuffer();
+    }
+
+    // Abandon the SurfaceTexture, releasing the ref that the SurfaceTexture has
+    // on buffers[2].
+    mST->abandon();
+
+    // Destroy the GL texture object to release its ref on buffers[2].
+    GLuint texID = TEX_ID;
+    glDeleteTextures(1, &texID);
+
+    // Destroy the EGLSurface.
+    EXPECT_TRUE(eglDestroySurface(mEglDisplay, stcEglSurface));
+    ASSERT_EQ(EGL_SUCCESS, eglGetError());
+
+    EXPECT_EQ(1, buffers[0]->getStrongCount());
+    EXPECT_EQ(1, buffers[1]->getStrongCount());
+    EXPECT_EQ(1, buffers[2]->getStrongCount());
+}
+
 } // namespace android
diff --git a/libs/utils/Android.mk b/libs/utils/Android.mk
index 638f72f..831d9e3 100644
--- a/libs/utils/Android.mk
+++ b/libs/utils/Android.mk
@@ -71,6 +71,10 @@
 endif
 endif
 
+ifeq ($(TARGET_OS),linux)
+LOCAL_LDLIBS += -lrt -ldl
+endif
+
 include $(BUILD_HOST_STATIC_LIBRARY)
 
 
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 50b8604..d3b0dbf 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -360,18 +360,6 @@
                 mCurrentScalingMode);
 
         if (!isFixedSize()) {
-            // we're being resized and there is a freeze display request,
-            // acquire a freeze lock, so that the screen stays put
-            // until we've redrawn at the new size; this is to avoid
-            // glitches upon orientation changes.
-            if (mFlinger->hasFreezeRequest()) {
-                // if the surface is hidden, don't try to acquire the
-                // freeze lock, since hidden surfaces may never redraw
-                if (!(front.flags & ISurfaceComposer::eLayerHidden)) {
-                    mFreezeLock = mFlinger->getFreezeLock();
-                }
-            }
-
             // this will make sure LayerBase::doTransaction doesn't update
             // the drawing state's size
             Layer::State& editDraw(mDrawingState);
@@ -385,14 +373,6 @@
                 temp.requested_h);
     }
 
-    if (temp.sequence != front.sequence) {
-        if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) {
-            // this surface is now hidden, so it shouldn't hold a freeze lock
-            // (it may never redraw, which is fine if it is hidden)
-            mFreezeLock.clear();
-        }
-    }
-        
     return LayerBase::doTransaction(flags);
 }
 
@@ -466,7 +446,7 @@
         glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
         glTexParameterx(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
-        // update the layer size and release freeze-lock
+        // update the layer size if needed
         const Layer::State& front(drawingState());
 
         // FIXME: mPostedDirtyRegion = dirty & bounds
@@ -503,9 +483,6 @@
 
                 // recompute visible region
                 recomputeVisibleRegions = true;
-
-                // we now have the correct size, unfreeze the screen
-                mFreezeLock.clear();
             }
 
             LOGD_IF(DEBUG_RESIZE,
@@ -538,11 +515,6 @@
         dirtyRegion.andSelf(visibleRegionScreen);
         outDirtyRegion.orSelf(dirtyRegion);
     }
-    if (visibleRegionScreen.isEmpty()) {
-        // an invisible layer should not hold a freeze-lock
-        // (because it may never be updated and therefore never release it)
-        mFreezeLock.clear();
-    }
 }
 
 void Layer::dump(String8& result, char* buffer, size_t SIZE) const
@@ -560,9 +532,9 @@
     snprintf(buffer, SIZE,
             "      "
             "format=%2d, activeBuffer=[%4ux%4u:%4u,%3X],"
-            " freezeLock=%p, transform-hint=0x%02x, queued-frames=%d\n",
+            " transform-hint=0x%02x, queued-frames=%d\n",
             mFormat, w0, h0, s0,f0,
-            getFreezeLock().get(), getTransformHint(), mQueuedFrames);
+            getTransformHint(), mQueuedFrames);
 
     result.append(buffer);
 
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 82e3521..2b9471b 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -39,7 +39,6 @@
 
 // ---------------------------------------------------------------------------
 
-class FreezeLock;
 class Client;
 class GLExtensions;
 
@@ -80,7 +79,6 @@
     virtual wp<IBinder> getSurfaceTextureBinder() const;
 
     // only for debugging
-    inline const sp<FreezeLock>&  getFreezeLock() const { return mFreezeLock; }
     inline const sp<GraphicBuffer>& getActiveBuffer() const { return mActiveBuffer; }
 
 protected:
@@ -124,9 +122,6 @@
     bool mProtectedByApp; // application requires protected path to external sink
     Region mPostedDirtyRegion;
 
-    // page-flip thread and transaction thread (currently main thread)
-    sp<FreezeLock>  mFreezeLock;
-
     // binder thread, transaction thread
     mutable Mutex mLock;
 };
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index ba8f630..a6d4147 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -80,15 +80,12 @@
 SurfaceFlinger::SurfaceFlinger()
     :   BnSurfaceComposer(), Thread(false),
         mTransactionFlags(0),
-        mResizeTransationPending(false),
+        mTransationPending(false),
         mLayersRemoved(false),
         mBootTime(systemTime()),
         mVisibleRegionsDirty(false),
         mHwWorkListDirty(false),
-        mFreezeDisplay(false),
         mElectronBeamAnimationMode(0),
-        mFreezeCount(0),
-        mFreezeDisplayTime(0),
         mDebugRegion(0),
         mDebugBackground(0),
         mDebugDDMS(0),
@@ -191,11 +188,6 @@
 {
     // the window manager died on us. prepare its eulogy.
 
-    // unfreeze the screen in case it was... frozen
-    mFreezeDisplayTime = 0;
-    mFreezeCount = 0;
-    mFreezeDisplay = false;
-
     // reset screen orientation
     setOrientation(0, eOrientationDefault, 0);
 
@@ -323,33 +315,7 @@
 {
     while (true) {
         nsecs_t timeout = -1;
-        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
-        if (UNLIKELY(isFrozen())) {
-            // wait 5 seconds
-            const nsecs_t now = systemTime();
-            if (mFreezeDisplayTime == 0) {
-                mFreezeDisplayTime = now;
-            }
-            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
-            timeout = waitTime>0 ? waitTime : 0;
-        }
-
         sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
-
-        // see if we timed out
-        if (isFrozen()) {
-            const nsecs_t now = systemTime();
-            nsecs_t frozenTime = (now - mFreezeDisplayTime);
-            if (frozenTime >= freezeDisplayTimeout) {
-                // we timed out and are still frozen
-                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
-                        mFreezeDisplay, mFreezeCount);
-                mFreezeDisplayTime = 0;
-                mFreezeCount = 0;
-                mFreezeDisplay = false;
-            }
-        }
-
         if (msg != 0) {
             switch (msg->what) {
                 case MessageQueue::INVALIDATE:
@@ -589,13 +555,6 @@
             mDirtyRegion.set(hw.bounds());
         }
 
-        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
-            // freezing or unfreezing the display -> trigger animation if needed
-            mFreezeDisplay = mCurrentState.freezeDisplay;
-            if (mFreezeDisplay)
-                 mFreezeDisplayTime = 0;
-        }
-
         if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
             // layers have been added
             mVisibleRegionsDirty = true;
@@ -621,11 +580,6 @@
     commitTransaction();
 }
 
-sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
-{
-    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
-}
-
 void SurfaceFlinger::computeVisibleRegions(
     const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
 {
@@ -755,7 +709,7 @@
 void SurfaceFlinger::commitTransaction()
 {
     mDrawingState = mCurrentState;
-    mResizeTransationPending = false;
+    mTransationPending = false;
     mTransactionCV.broadcast();
 }
 
@@ -1243,15 +1197,14 @@
 
 
 void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state,
-        int orientation) {
+        int orientation, uint32_t flags) {
     Mutex::Autolock _l(mStateLock);
 
-    uint32_t flags = 0;
+    uint32_t transactionFlags = 0;
     if (mCurrentState.orientation != orientation) {
         if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
             mCurrentState.orientation = orientation;
-            flags |= eTransactionNeeded;
-            mResizeTransationPending = true;
+            transactionFlags |= eTransactionNeeded;
         } else if (orientation != eOrientationUnchanged) {
             LOGW("setTransactionState: ignoring unrecognized orientation: %d",
                     orientation);
@@ -1262,56 +1215,29 @@
     for (size_t i=0 ; i<count ; i++) {
         const ComposerState& s(state[i]);
         sp<Client> client( static_cast<Client *>(s.client.get()) );
-        flags |= setClientStateLocked(client, s.state);
+        transactionFlags |= setClientStateLocked(client, s.state);
     }
-    if (flags) {
-        setTransactionFlags(flags);
+    if (transactionFlags) {
+        setTransactionFlags(transactionFlags);
     }
 
-    signalEvent();
-
-    // if there is a transaction with a resize, wait for it to
-    // take effect before returning.
-    while (mResizeTransationPending) {
+    // if this is a synchronous transaction, wait for it to take effect before
+    // returning.
+    if (flags & eSynchronous) {
+        mTransationPending = true;
+    }
+    while (mTransationPending) {
         status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
         if (CC_UNLIKELY(err != NO_ERROR)) {
             // just in case something goes wrong in SF, return to the
             // called after a few seconds.
             LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
-            mResizeTransationPending = false;
+            mTransationPending = false;
             break;
         }
     }
 }
 
-status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
-{
-    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
-        return BAD_VALUE;
-
-    Mutex::Autolock _l(mStateLock);
-    mCurrentState.freezeDisplay = 1;
-    setTransactionFlags(eTransactionNeeded);
-
-    // flags is intended to communicate some sort of animation behavior
-    // (for instance fading)
-    return NO_ERROR;
-}
-
-status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
-{
-    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
-        return BAD_VALUE;
-
-    Mutex::Autolock _l(mStateLock);
-    mCurrentState.freezeDisplay = 0;
-    setTransactionFlags(eTransactionNeeded);
-
-    // flags is intended to communicate some sort of animation behavior
-    // (for instance fading)
-    return NO_ERROR;
-}
-
 int SurfaceFlinger::setOrientation(DisplayID dpy,
         int orientation, uint32_t flags)
 {
@@ -1512,7 +1438,6 @@
         if (what & eSizeChanged) {
             if (layer->setSize(s.w, s.h)) {
                 flags |= eTraversalNeeded;
-                mResizeTransationPending = true;
             }
         }
         if (what & eAlphaChanged) {
@@ -1632,8 +1557,7 @@
         mWormholeRegion.dump(result, "WormholeRegion");
         const DisplayHardware& hw(graphicPlane(0).displayHardware());
         snprintf(buffer, SIZE,
-                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
-                mFreezeDisplay?"yes":"no", mFreezeCount,
+                "  orientation=%d, canDraw=%d\n",
                 mCurrentState.orientation, hw.canDraw());
         result.append(buffer);
         snprintf(buffer, SIZE,
@@ -1693,8 +1617,6 @@
         case CREATE_CONNECTION:
         case SET_TRANSACTION_STATE:
         case SET_ORIENTATION:
-        case FREEZE_DISPLAY:
-        case UNFREEZE_DISPLAY:
         case BOOT_FINISHED:
         case TURN_ELECTRON_BEAM_OFF:
         case TURN_ELECTRON_BEAM_ON:
@@ -1766,10 +1688,6 @@
                 GraphicLog::getInstance().setEnabled(enabled);
                 return NO_ERROR;
             }
-            case 1007: // set mFreezeCount
-                mFreezeCount = data.readInt32();
-                mFreezeDisplayTime = 0;
-                return NO_ERROR;
             case 1008:  // toggle use of hw composer
                 n = data.readInt32();
                 mDebugDisableHWC = n ? 1 : 0;
@@ -1866,8 +1784,10 @@
     // redraw the screen entirely...
     glDisable(GL_TEXTURE_EXTERNAL_OES);
     glDisable(GL_TEXTURE_2D);
+    glDisable(GL_SCISSOR_TEST);
     glClearColor(0,0,0,1);
     glClear(GL_COLOR_BUFFER_BIT);
+    glEnable(GL_SCISSOR_TEST);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
     const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 3284fdb..ea5bfa7 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -46,7 +46,6 @@
 
 class Client;
 class DisplayHardware;
-class FreezeLock;
 class Layer;
 class LayerDim;
 class LayerScreenshot;
@@ -169,9 +168,7 @@
     virtual sp<IMemoryHeap>             getCblk() const;
     virtual void                        bootFinished();
     virtual void                        setTransactionState(const Vector<ComposerState>& state,
-                                                            int orientation);
-    virtual status_t                    freezeDisplay(DisplayID dpy, uint32_t flags);
-    virtual status_t                    unfreezeDisplay(DisplayID dpy, uint32_t flags);
+                                                            int orientation, uint32_t flags);
     virtual int                         setOrientation(DisplayID dpy, int orientation, uint32_t flags);
     virtual bool                        authenticateSurfaceTexture(const sp<ISurfaceTexture>& surface) const;
 
@@ -269,12 +266,10 @@
     struct State {
         State() {
             orientation = ISurfaceComposer::eOrientationDefault;
-            freezeDisplay = 0;
         }
         LayerVector     layersSortedByZ;
         uint8_t         orientation;
         uint8_t         orientationFlags;
-        uint8_t         freezeDisplay;
     };
 
     virtual bool        threadLoop();
@@ -336,20 +331,6 @@
             status_t renderScreenToTextureLocked(DisplayID dpy,
                     GLuint* textureName, GLfloat* uOut, GLfloat* vOut);
 
-            friend class FreezeLock;
-            sp<FreezeLock> getFreezeLock() const;
-            inline void incFreezeCount() {
-                if (mFreezeCount == 0)
-                    mFreezeDisplayTime = 0;
-                mFreezeCount++;
-            }
-            inline void decFreezeCount() { if (mFreezeCount > 0) mFreezeCount--; }
-            inline bool hasFreezeRequest() const { return mFreezeDisplay; }
-            inline bool isFrozen() const { 
-                return (mFreezeDisplay || mFreezeCount>0) && mBootFinished;
-            }
-
-            
             void        debugFlashRegions();
             void        debugShowFPS() const;
             void        drawWormhole() const;
@@ -363,7 +344,7 @@
     volatile    int32_t                 mTransactionFlags;
                 Condition               mTransactionCV;
                 SortedVector< sp<LayerBase> > mLayerPurgatory;
-                bool                    mResizeTransationPending;
+                bool                    mTransationPending;
 
                 // protected by mStateLock (but we could use another lock)
                 GraphicPlane                mGraphicPlanes[1];
@@ -390,10 +371,7 @@
                 Region                      mWormholeRegion;
                 bool                        mVisibleRegionsDirty;
                 bool                        mHwWorkListDirty;
-                bool                        mFreezeDisplay;
                 int32_t                     mElectronBeamAnimationMode;
-                int32_t                     mFreezeCount;
-                nsecs_t                     mFreezeDisplayTime;
                 Vector< sp<LayerBase> >     mVisibleLayersSortedByZ;
 
 
@@ -429,20 +407,6 @@
 };
 
 // ---------------------------------------------------------------------------
-
-class FreezeLock : public LightRefBase<FreezeLock> {
-    SurfaceFlinger* mFlinger;
-public:
-    FreezeLock(SurfaceFlinger* flinger)
-        : mFlinger(flinger) {
-        mFlinger->incFreezeCount();
-    }
-    ~FreezeLock() {
-        mFlinger->decFreezeCount();
-    }
-};
-
-// ---------------------------------------------------------------------------
 }; // namespace android
 
 #endif // ANDROID_SURFACE_FLINGER_H
diff --git a/services/surfaceflinger/tests/Android.mk b/services/surfaceflinger/tests/Android.mk
index 5053e7d..b655648 100644
--- a/services/surfaceflinger/tests/Android.mk
+++ b/services/surfaceflinger/tests/Android.mk
@@ -1 +1,40 @@
-include $(call all-subdir-makefiles)
+# Build the unit tests,
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := SurfaceFlinger_test
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_SRC_FILES := \
+    Transaction_test.cpp \
+
+LOCAL_SHARED_LIBRARIES := \
+	libEGL \
+	libGLESv2 \
+	libandroid \
+	libbinder \
+	libcutils \
+	libgui \
+	libstlport \
+	libui \
+	libutils \
+
+LOCAL_C_INCLUDES := \
+    bionic \
+    bionic/libstdc++/include \
+    external/gtest/include \
+    external/stlport/stlport \
+
+# Build the binary to $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
+# to integrate with auto-test framework.
+include $(BUILD_NATIVE_TEST)
+
+# Include subdirectory makefiles
+# ============================================================
+
+# If we're building with ONE_SHOT_MAKEFILE (mm, mmm), then what the framework
+# team really wants is to build the stuff defined by this makefile.
+ifeq (,$(ONE_SHOT_MAKEFILE))
+include $(call first-makefiles-under,$(LOCAL_PATH))
+endif
diff --git a/services/surfaceflinger/tests/Transaction_test.cpp b/services/surfaceflinger/tests/Transaction_test.cpp
new file mode 100644
index 0000000..afafd8a
--- /dev/null
+++ b/services/surfaceflinger/tests/Transaction_test.cpp
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <binder/IMemory.h>
+#include <surfaceflinger/ISurfaceComposer.h>
+#include <surfaceflinger/Surface.h>
+#include <surfaceflinger/SurfaceComposerClient.h>
+#include <utils/String8.h>
+
+namespace android {
+
+// Fill an RGBA_8888 formatted surface with a single color.
+static void fillSurfaceRGBA8(const sp<SurfaceControl>& sc,
+        uint8_t r, uint8_t g, uint8_t b) {
+    Surface::SurfaceInfo info;
+    sp<Surface> s = sc->getSurface();
+    ASSERT_TRUE(s != NULL);
+    ASSERT_EQ(NO_ERROR, s->lock(&info));
+    uint8_t* img = reinterpret_cast<uint8_t*>(info.bits);
+    for (uint32_t y = 0; y < info.h; y++) {
+        for (uint32_t x = 0; x < info.w; x++) {
+            uint8_t* pixel = img + (4 * (y*info.s + x));
+            pixel[0] = r;
+            pixel[1] = g;
+            pixel[2] = b;
+            pixel[3] = 255;
+        }
+    }
+    ASSERT_EQ(NO_ERROR, s->unlockAndPost());
+}
+
+// A ScreenCapture is a screenshot from SurfaceFlinger that can be used to check
+// individual pixel values for testing purposes.
+class ScreenCapture : public RefBase {
+public:
+    static void captureScreen(sp<ScreenCapture>* sc) {
+        sp<IMemoryHeap> heap;
+        uint32_t w=0, h=0;
+        PixelFormat fmt=0;
+        sp<ISurfaceComposer> sf(ComposerService::getComposerService());
+        ASSERT_EQ(NO_ERROR, sf->captureScreen(0, &heap, &w, &h, &fmt, 0, 0,
+                0, INT_MAX));
+        ASSERT_TRUE(heap != NULL);
+        ASSERT_EQ(PIXEL_FORMAT_RGBA_8888, fmt);
+        *sc = new ScreenCapture(w, h, heap);
+    }
+
+    void checkPixel(uint32_t x, uint32_t y, uint8_t r, uint8_t g, uint8_t b) {
+        const uint8_t* img = reinterpret_cast<const uint8_t*>(mHeap->base());
+        const uint8_t* pixel = img + (4 * (y*mWidth + x));
+        if (r != pixel[0] || g != pixel[1] || b != pixel[2]) {
+            String8 err(String8::format("pixel @ (%3d, %3d): "
+                    "expected [%3d, %3d, %3d], got [%3d, %3d, %3d]",
+                    x, y, r, g, b, pixel[0], pixel[1], pixel[2]));
+            EXPECT_EQ(String8(), err);
+        }
+    }
+
+private:
+    ScreenCapture(uint32_t w, uint32_t h, const sp<IMemoryHeap>& heap) :
+        mWidth(w),
+        mHeight(h),
+        mHeap(heap)
+    {}
+
+    const uint32_t mWidth;
+    const uint32_t mHeight;
+    sp<IMemoryHeap> mHeap;
+};
+
+class LayerUpdateTest : public ::testing::Test {
+protected:
+    virtual void SetUp() {
+        mComposerClient = new SurfaceComposerClient;
+        ASSERT_EQ(NO_ERROR, mComposerClient->initCheck());
+
+        ssize_t displayWidth = mComposerClient->getDisplayWidth(0);
+        ssize_t displayHeight = mComposerClient->getDisplayHeight(0);
+
+        // Background surface
+        mBGSurfaceControl = mComposerClient->createSurface(
+                String8("BG Test Surface"), 0, displayWidth, displayHeight,
+                PIXEL_FORMAT_RGBA_8888, 0);
+        ASSERT_TRUE(mBGSurfaceControl != NULL);
+        ASSERT_TRUE(mBGSurfaceControl->isValid());
+        fillSurfaceRGBA8(mBGSurfaceControl, 63, 63, 195);
+
+        // Foreground surface
+        mFGSurfaceControl = mComposerClient->createSurface(
+                String8("FG Test Surface"), 0, 64, 64, PIXEL_FORMAT_RGBA_8888, 0);
+        ASSERT_TRUE(mFGSurfaceControl != NULL);
+        ASSERT_TRUE(mFGSurfaceControl->isValid());
+
+        fillSurfaceRGBA8(mFGSurfaceControl, 195, 63, 63);
+
+        // Synchronization surface
+        mSyncSurfaceControl = mComposerClient->createSurface(
+                String8("Sync Test Surface"), 0, 1, 1, PIXEL_FORMAT_RGBA_8888, 0);
+        ASSERT_TRUE(mSyncSurfaceControl != NULL);
+        ASSERT_TRUE(mSyncSurfaceControl->isValid());
+
+        fillSurfaceRGBA8(mSyncSurfaceControl, 31, 31, 31);
+
+        SurfaceComposerClient::openGlobalTransaction();
+
+        ASSERT_EQ(NO_ERROR, mBGSurfaceControl->setLayer(INT_MAX-2));
+        ASSERT_EQ(NO_ERROR, mBGSurfaceControl->show());
+
+        ASSERT_EQ(NO_ERROR, mFGSurfaceControl->setLayer(INT_MAX-1));
+        ASSERT_EQ(NO_ERROR, mFGSurfaceControl->setPosition(64, 64));
+        ASSERT_EQ(NO_ERROR, mFGSurfaceControl->show());
+
+        ASSERT_EQ(NO_ERROR, mSyncSurfaceControl->setLayer(INT_MAX-1));
+        ASSERT_EQ(NO_ERROR, mSyncSurfaceControl->setPosition(displayWidth-2,
+                displayHeight-2));
+        ASSERT_EQ(NO_ERROR, mSyncSurfaceControl->show());
+
+        SurfaceComposerClient::closeGlobalTransaction(true);
+    }
+
+    virtual void TearDown() {
+        mComposerClient->dispose();
+        mBGSurfaceControl = 0;
+        mFGSurfaceControl = 0;
+        mSyncSurfaceControl = 0;
+        mComposerClient = 0;
+    }
+
+    void waitForPostedBuffers() {
+        // Since the sync surface is in synchronous mode (i.e. double buffered)
+        // posting three buffers to it should ensure that at least two
+        // SurfaceFlinger::handlePageFlip calls have been made, which should
+        // guaranteed that a buffer posted to another Surface has been retired.
+        fillSurfaceRGBA8(mSyncSurfaceControl, 31, 31, 31);
+        fillSurfaceRGBA8(mSyncSurfaceControl, 31, 31, 31);
+        fillSurfaceRGBA8(mSyncSurfaceControl, 31, 31, 31);
+    }
+
+    sp<SurfaceComposerClient> mComposerClient;
+    sp<SurfaceControl> mBGSurfaceControl;
+    sp<SurfaceControl> mFGSurfaceControl;
+
+    // This surface is used to ensure that the buffers posted to
+    // mFGSurfaceControl have been picked up by SurfaceFlinger.
+    sp<SurfaceControl> mSyncSurfaceControl;
+};
+
+TEST_F(LayerUpdateTest, LayerMoveWorks) {
+    sp<ScreenCapture> sc;
+    {
+        SCOPED_TRACE("before move");
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(  0,  12,  63,  63, 195);
+        sc->checkPixel( 75,  75, 195,  63,  63);
+        sc->checkPixel(145, 145,  63,  63, 195);
+    }
+
+    SurfaceComposerClient::openGlobalTransaction();
+    ASSERT_EQ(NO_ERROR, mFGSurfaceControl->setPosition(128, 128));
+    SurfaceComposerClient::closeGlobalTransaction(true);
+    {
+        // This should reflect the new position, but not the new color.
+        SCOPED_TRACE("after move, before redraw");
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel( 24,  24,  63,  63, 195);
+        sc->checkPixel( 75,  75,  63,  63, 195);
+        sc->checkPixel(145, 145, 195,  63,  63);
+    }
+
+    fillSurfaceRGBA8(mFGSurfaceControl, 63, 195, 63);
+    waitForPostedBuffers();
+    {
+        // This should reflect the new position and the new color.
+        SCOPED_TRACE("after redraw");
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel( 24,  24,  63,  63, 195);
+        sc->checkPixel( 75,  75,  63,  63, 195);
+        sc->checkPixel(145, 145,  63, 195,  63);
+    }
+}
+
+TEST_F(LayerUpdateTest, LayerResizeWorks) {
+    sp<ScreenCapture> sc;
+    {
+        SCOPED_TRACE("before resize");
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(  0,  12,  63,  63, 195);
+        sc->checkPixel( 75,  75, 195,  63,  63);
+        sc->checkPixel(145, 145,  63,  63, 195);
+    }
+
+    LOGD("resizing");
+    SurfaceComposerClient::openGlobalTransaction();
+    ASSERT_EQ(NO_ERROR, mFGSurfaceControl->setSize(128, 128));
+    SurfaceComposerClient::closeGlobalTransaction(true);
+    LOGD("resized");
+    {
+        // This should not reflect the new size or color because SurfaceFlinger
+        // has not yet received a buffer of the correct size.
+        SCOPED_TRACE("after resize, before redraw");
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel(  0,  12,  63,  63, 195);
+        sc->checkPixel( 75,  75, 195,  63,  63);
+        sc->checkPixel(145, 145,  63,  63, 195);
+    }
+
+    LOGD("drawing");
+    fillSurfaceRGBA8(mFGSurfaceControl, 63, 195, 63);
+    waitForPostedBuffers();
+    LOGD("drawn");
+    {
+        // This should reflect the new size and the new color.
+        SCOPED_TRACE("after redraw");
+        ScreenCapture::captureScreen(&sc);
+        sc->checkPixel( 24,  24,  63,  63, 195);
+        sc->checkPixel( 75,  75,  63, 195,  63);
+        sc->checkPixel(145, 145,  63, 195,  63);
+    }
+}
+
+}