diff --git a/include/ui/Surface.h b/include/ui/Surface.h
index 118fb83..2cedeb6 100644
--- a/include/ui/Surface.h
+++ b/include/ui/Surface.h
@@ -212,7 +212,7 @@
 
     
     void setUsage(uint32_t reqUsage);
-    bool getUsage(uint32_t* usage);
+    uint32_t getUsage() const;
     
     // constants
     sp<SurfaceComposerClient>   mClient;
@@ -227,7 +227,6 @@
     // protected by mSurfaceLock
     Rect                        mSwapRectangle;
     uint32_t                    mUsage;
-    int32_t                     mUsageChanged;
     
     // protected by mSurfaceLock. These are also used from lock/unlock
     // but in that case, they must be called form the same thread.
diff --git a/include/utils/ResourceTypes.h b/include/utils/ResourceTypes.h
index e524e2a..17ccad6 100644
--- a/include/utils/ResourceTypes.h
+++ b/include/utils/ResourceTypes.h
@@ -864,6 +864,13 @@
         KEYSHIDDEN_SOFT = 0x0003,
     };
     
+    enum {
+        MASK_NAVHIDDEN = 0x000c,
+        NAVHIDDEN_ANY = 0x0000,
+        NAVHIDDEN_NO = 0x0004,
+        NAVHIDDEN_YES = 0x0008,
+    };
+    
     union {
         struct {
             uint8_t keyboard;
@@ -1011,7 +1018,8 @@
         if (orientation != o.orientation) diffs |= CONFIG_ORIENTATION;
         if (density != o.density) diffs |= CONFIG_DENSITY;
         if (touchscreen != o.touchscreen) diffs |= CONFIG_TOUCHSCREEN;
-        if (((inputFlags^o.inputFlags)&MASK_KEYSHIDDEN) != 0) diffs |= CONFIG_KEYBOARD_HIDDEN;
+        if (((inputFlags^o.inputFlags)&(MASK_KEYSHIDDEN|MASK_NAVHIDDEN)) != 0)
+                diffs |= CONFIG_KEYBOARD_HIDDEN;
         if (keyboard != o.keyboard) diffs |= CONFIG_KEYBOARD;
         if (navigation != o.navigation) diffs |= CONFIG_NAVIGATION;
         if (screenSize != o.screenSize) diffs |= CONFIG_SCREEN_SIZE;
@@ -1082,6 +1090,11 @@
                 if (!(o.inputFlags & MASK_KEYSHIDDEN)) return true;
             }
 
+            if (((inputFlags^o.inputFlags) & MASK_NAVHIDDEN) != 0) {
+                if (!(inputFlags & MASK_NAVHIDDEN)) return false;
+                if (!(o.inputFlags & MASK_NAVHIDDEN)) return true;
+            }
+
             if (keyboard != o.keyboard) {
                 if (!keyboard) return false;
                 if (!o.keyboard) return true;
@@ -1225,6 +1238,18 @@
                     }
                 }
 
+                const int navHidden = inputFlags & MASK_NAVHIDDEN;
+                const int oNavHidden = o.inputFlags & MASK_NAVHIDDEN;
+                if (navHidden != oNavHidden) {
+                    const int reqNavHidden =
+                            requested->inputFlags & MASK_NAVHIDDEN;
+                    if (reqNavHidden) {
+
+                        if (!navHidden) return false;
+                        if (!oNavHidden) return true;
+                    }
+                }
+
                 if ((keyboard != o.keyboard) && requested->keyboard) {
                     return (keyboard);
                 }
@@ -1332,6 +1357,12 @@
                     return false;
                 }
             }
+            const int navHidden = inputFlags&MASK_NAVHIDDEN;
+            const int setNavHidden = settings.inputFlags&MASK_NAVHIDDEN;
+            if (setNavHidden != 0 && navHidden != 0
+                && navHidden != setNavHidden) {
+                return false;
+            }
             if (settings.keyboard != 0 && keyboard != 0
                 && keyboard != settings.keyboard) {
                 return false;
diff --git a/libs/audioflinger/AudioFlinger.cpp b/libs/audioflinger/AudioFlinger.cpp
index 4f7500f..add358b 100644
--- a/libs/audioflinger/AudioFlinger.cpp
+++ b/libs/audioflinger/AudioFlinger.cpp
@@ -2069,7 +2069,7 @@
    }
 }
 
-AudioFlinger::PlaybackThread::TrackBase::~TrackBase()
+AudioFlinger::ThreadBase::TrackBase::~TrackBase()
 {
     if (mCblk) {
         mCblk->~audio_track_cblk_t();   // destroy our shared-structure.
@@ -2081,7 +2081,7 @@
     mClient.clear();
 }
 
-void AudioFlinger::PlaybackThread::TrackBase::releaseBuffer(AudioBufferProvider::Buffer* buffer)
+void AudioFlinger::ThreadBase::TrackBase::releaseBuffer(AudioBufferProvider::Buffer* buffer)
 {
     buffer->raw = 0;
     mFrameCount = buffer->frameCount;
@@ -2089,7 +2089,7 @@
     buffer->frameCount = 0;
 }
 
-bool AudioFlinger::PlaybackThread::TrackBase::step() {
+bool AudioFlinger::ThreadBase::TrackBase::step() {
     bool result;
     audio_track_cblk_t* cblk = this->cblk();
 
@@ -2101,7 +2101,7 @@
     return result;
 }
 
-void AudioFlinger::PlaybackThread::TrackBase::reset() {
+void AudioFlinger::ThreadBase::TrackBase::reset() {
     audio_track_cblk_t* cblk = this->cblk();
 
     cblk->user = 0;
@@ -2112,20 +2112,20 @@
     LOGV("TrackBase::reset");
 }
 
-sp<IMemory> AudioFlinger::PlaybackThread::TrackBase::getCblk() const
+sp<IMemory> AudioFlinger::ThreadBase::TrackBase::getCblk() const
 {
     return mCblkMemory;
 }
 
-int AudioFlinger::PlaybackThread::TrackBase::sampleRate() const {
+int AudioFlinger::ThreadBase::TrackBase::sampleRate() const {
     return (int)mCblk->sampleRate;
 }
 
-int AudioFlinger::PlaybackThread::TrackBase::channelCount() const {
+int AudioFlinger::ThreadBase::TrackBase::channelCount() const {
     return (int)mCblk->channels;
 }
 
-void* AudioFlinger::PlaybackThread::TrackBase::getBuffer(uint32_t offset, uint32_t frames) const {
+void* AudioFlinger::ThreadBase::TrackBase::getBuffer(uint32_t offset, uint32_t frames) const {
     audio_track_cblk_t* cblk = this->cblk();
     int8_t *bufferStart = (int8_t *)mBuffer + (offset-cblk->serverBase)*cblk->frameSize;
     int8_t *bufferEnd = bufferStart + frames * cblk->frameSize;
diff --git a/libs/surfaceflinger/LayerBuffer.cpp b/libs/surfaceflinger/LayerBuffer.cpp
index bbfc54b..38a897d 100644
--- a/libs/surfaceflinger/LayerBuffer.cpp
+++ b/libs/surfaceflinger/LayerBuffer.cpp
@@ -607,9 +607,10 @@
 
 void LayerBuffer::OverlaySource::onDraw(const Region& clip) const
 {
+    // this would be where the color-key would be set, should we need it.
     GLclampx red = 0;
     GLclampx green = 0;
-    GLclampx blue = 0x1818;
+    GLclampx blue = 0;
     mLayer.clearWithOpenGL(clip, red, green, blue, 0);
 }
 
diff --git a/libs/ui/Surface.cpp b/libs/ui/Surface.cpp
index c3fbea2..64522fb 100644
--- a/libs/ui/Surface.cpp
+++ b/libs/ui/Surface.cpp
@@ -361,7 +361,6 @@
     const_cast<uint32_t&>(android_native_window_t::flags) = 0;
     // be default we request a hardware surface
     mUsage = GRALLOC_USAGE_HW_RENDER;
-    mUsageChanged = true;
     mNeedFullUpdate = false;
 }
 
@@ -498,14 +497,14 @@
         LOGE("error dequeuing a buffer (%s)", strerror(bufIdx));
         return bufIdx;
     }
-    
-    // FIXME: in case of failure below, we need to undo the dequeue
-    
-    uint32_t usage;
-    const bool usageChanged = getUsage(&usage);
+
+    // below we make sure we AT LEAST have the usage flags we want
+    const uint32_t usage(getUsage());
     const sp<SurfaceBuffer>& backBuffer(mBuffers[bufIdx]);
-    if ((backBuffer == 0) || usageChanged || 
-            mSharedBufferClient->needNewBuffer(bufIdx)) {
+    if (backBuffer == 0 || 
+        ((uint32_t(backBuffer->usage) & usage) != usage) ||
+        mSharedBufferClient->needNewBuffer(bufIdx)) 
+    {
         err = getBufferLocked(bufIdx, usage);
         LOGE_IF(err, "getBufferLocked(%ld, %08x) failed (%s)",
                 bufIdx, usage, strerror(-err));
@@ -600,21 +599,13 @@
 void Surface::setUsage(uint32_t reqUsage)
 {
     Mutex::Autolock _l(mSurfaceLock);
-    if (mUsage != reqUsage) {
-        mUsageChanged = true;
-        mUsage = reqUsage;
-    }
+    mUsage = reqUsage;
 }
 
-bool Surface::getUsage(uint32_t* usage)
+uint32_t Surface::getUsage() const
 {
     Mutex::Autolock _l(mSurfaceLock);
-    *usage = mUsage;
-    if (mUsageChanged) {
-        mUsageChanged = false;
-        return true;
-    }
-    return false;
+    return mUsage;
 }
 
 // ----------------------------------------------------------------------------
diff --git a/opengl/tests/gl2_basic/gl2_basic.cpp b/opengl/tests/gl2_basic/gl2_basic.cpp
index 705794a..f969a46 100644
--- a/opengl/tests/gl2_basic/gl2_basic.cpp
+++ b/opengl/tests/gl2_basic/gl2_basic.cpp
@@ -33,11 +33,45 @@
 
 static void printGLString(const char *name, GLenum s)
 {
+     fprintf(stderr, "printGLString %s, %d\n", name, s);
      const char *v = (const char *)glGetString(s);
-     if (v)
-         printf("GL %s = %s\n", name, v);
+     int error = glGetError();
+     fprintf(stderr, "glGetError() = %d, result of glGetString = %x\n", error,
+         (unsigned int)v);
+     if ((v < (const char*) 0) || (v > (const char*) 0x1000))
+         fprintf(stderr, "GL %s = %s\n", name, v);
      else
-         printf("GL %s = (null)\n", name);
+         fprintf(stderr, "GL %s = (null)\n", name);
+}
+
+static const char* eglErrorToString[] = {
+    "EGL_SUCCESS",      // 0x3000 12288
+    "EGL_NOT_INITIALIZED",
+    "EGL_BAD_ACCESS",   // 0x3002 12290
+    "EGL_BAD_ALLOC",
+    "EGL_BAD_ATTRIBUTE",
+    "EGL_BAD_CONFIG",
+    "EGL_BAD_CONTEXT",  // 0x3006 12294
+    "EGL_BAD_CURRENT_SURFACE",
+    "EGL_BAD_DISPLAY",
+    "EGL_BAD_MATCH",
+    "EGL_BAD_NATIVE_PIXMAP",
+    "EGL_BAD_NATIVE_WINDOW",
+    "EGL_BAD_PARAMETER",  // 0x300c 12300
+    "EGL_BAD_SURFACE"
+};
+
+static void checkEglError(const char* op) {
+    for(EGLint error = eglGetError();
+		error != EGL_SUCCESS;
+	error = eglGetError()) {
+        const char* errorString = "unknown";
+        if (error >= EGL_SUCCESS && error <= EGL_BAD_SURFACE) {
+            errorString = eglErrorToString[error - EGL_SUCCESS];
+        }
+        fprintf(stderr, "%s() returned eglError %s (0x%x)\n", op,
+            errorString, error);
+    }
 }
 
 int main(int argc, char** argv)
@@ -63,19 +97,33 @@
      EGLNativeWindowType window = 0;
      window = android_createDisplaySurface();
 
+     checkEglError("<init>");
      dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+     checkEglError("eglGetDisplay");
      eglInitialize(dpy, &majorVersion, &minorVersion);
+     checkEglError("eglInitialize");
+     fprintf(stderr, "EGL version %d.%d\n", majorVersion, minorVersion);
      EGLUtils::selectConfigForNativeWindow(dpy, s_configAttribs, window, &config);
-     surface = eglCreateWindowSurface(dpy, config, window, NULL);
+     fprintf(stderr, "Chosen config: 0x%08x\n", (unsigned long) config);
 
-    EGLint gl2_0Attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
+     checkEglError("EGLUtils::selectConfigForNativeWindow");
+     surface = eglCreateWindowSurface(dpy, config, window, NULL);
+     checkEglError("eglCreateWindowSurface");
+
+     EGLint gl2_0Attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
 
      context = eglCreateContext(dpy, config, NULL, gl2_0Attribs);
+     checkEglError("eglCreateContext");
      eglMakeCurrent(dpy, surface, surface, context);
+     checkEglError("eglMakeCurrent");
      eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
+     checkEglError("eglQuerySurface");
      eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
+     checkEglError("eglQuerySurface");
      GLint dim = w<h ? w : h;
 
+     fprintf(stderr, "Window dimensions: %d x %d\n", w, h);
+
      printGLString("Version", GL_VERSION);
      printGLString("Vendor", GL_VENDOR);
      printGLString("Renderer", GL_RENDERER);