diff --git a/camera/libcameraservice/CameraService.cpp b/camera/libcameraservice/CameraService.cpp
index e66b00f..3c2dc2b 100644
--- a/camera/libcameraservice/CameraService.cpp
+++ b/camera/libcameraservice/CameraService.cpp
@@ -552,17 +552,6 @@
     CameraParameters params(mHardware->getParameters());
     params.getPreviewSize(&w, &h);
 
-    const char *format = params.getPreviewFormat();
-    int fmt;
-    if (!strcmp(format, "yuv422i-yuyv"))
-        fmt = OVERLAY_FORMAT_YCbYCr_422_I;
-    else if (!strcmp(format, "rgb565"))
-        fmt = OVERLAY_FORMAT_RGB_565;
-    else {
-        LOGE("Invalid preview format for overlays");
-        return -EINVAL;
-    }
-
     if ( w != mOverlayW || h != mOverlayH )
     {
         // Force the destruction of any previous overlay
@@ -574,7 +563,7 @@
     status_t ret = NO_ERROR;
     if (mSurface != 0) {
         if (mOverlayRef.get() == NULL) {
-            mOverlayRef = mSurface->createOverlay(w, h, fmt);
+            mOverlayRef = mSurface->createOverlay(w, h, OVERLAY_FORMAT_DEFAULT);
             if ( mOverlayRef.get() == NULL )
             {
                 LOGE("Overlay Creation Failed!");
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index 651e7cf..d893f0a 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -103,10 +103,22 @@
     }
 
     // initialize EGL
-    const EGLint attribs[] = {
+    EGLint attribs[] = {
             EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
+            EGL_NONE,           0,
             EGL_NONE
     };
+
+    // debug: disable h/w rendering
+    char property[PROPERTY_VALUE_MAX];
+    if (property_get("debug.sf.hw", property, NULL) > 0) {
+        if (atoi(property) == 0) {
+            LOGW("H/W composition disabled");
+            attribs[2] = EGL_CONFIG_CAVEAT;
+            attribs[3] = EGL_SLOW_CONFIG;
+        }
+    }
+
     EGLint w, h, dummy;
     EGLint numConfigs=0;
     EGLSurface surface;
@@ -193,7 +205,6 @@
     mDpiY = mNativeWindow->ydpi;
     mRefreshRate = fbDev->fps; 
     
-    char property[PROPERTY_VALUE_MAX];
     /* Read density from build-specific ro.sf.lcd_density property
      * except if it is overridden by qemu.sf.lcd_density.
      */
diff --git a/libs/surfaceflinger/LayerBlur.cpp b/libs/surfaceflinger/LayerBlur.cpp
index 00abd5a..e14f35b 100644
--- a/libs/surfaceflinger/LayerBlur.cpp
+++ b/libs/surfaceflinger/LayerBlur.cpp
@@ -24,6 +24,7 @@
 #include <GLES/gl.h>
 #include <GLES/glext.h>
 
+#include "clz.h"
 #include "BlurFilter.h"
 #include "LayerBlur.h"
 #include "SurfaceFlinger.h"
@@ -40,7 +41,8 @@
 LayerBlur::LayerBlur(SurfaceFlinger* flinger, DisplayID display,
         const sp<Client>& client, int32_t i)
      : LayerBaseClient(flinger, display, client, i), mCacheDirty(true),
-     mRefreshCache(true), mCacheAge(0), mTextureName(-1U)
+     mRefreshCache(true), mCacheAge(0), mTextureName(-1U), 
+     mWidthScale(1.0f), mHeightScale(1.0f)
 {
 }
 
@@ -164,11 +166,26 @@
             bl.format = GGL_PIXEL_FORMAT_RGB_565;
             bl.data = (GGLubyte*)pixels;            
             blurFilter(&bl, 8, 2);
-            
-            // NOTE: this works only because we have POT. we'd have to round the
-            // texture size up, otherwise.
-            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0,
-                    GL_RGB, GL_UNSIGNED_SHORT_5_6_5, pixels);
+
+            if (mFlags & (DisplayHardware::NPOT_EXTENSION)) {
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0,
+                        GL_RGB, GL_UNSIGNED_SHORT_5_6_5, pixels);
+                mWidthScale  = 1.0f / w;
+                mHeightScale =-1.0f / h;
+                mYOffset = 0;
+            } else {
+                GLuint tw = 1 << (31 - clz(w));
+                GLuint th = 1 << (31 - clz(h));
+                if (tw < w) tw <<= 1;
+                if (th < h) th <<= 1;
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0,
+                        GL_RGB, GL_UNSIGNED_SHORT_5_6_5, NULL);
+                glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, 
+                        GL_RGB, GL_UNSIGNED_SHORT_5_6_5, pixels);
+                mWidthScale  = 1.0f / tw;
+                mHeightScale =-1.0f / th;
+                mYOffset = th-h;
+            }
 
             free((void*)pixels);
         }
@@ -184,7 +201,12 @@
             glDisable(GL_BLEND);
         }
 
-        glDisable(GL_DITHER);
+        if (mFlags & DisplayHardware::SLOW_CONFIG) {
+            glDisable(GL_DITHER);
+        } else {
+            glEnable(GL_DITHER);
+        }
+
         glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
         glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
         glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@@ -194,8 +216,8 @@
             // This is a very rare scenario.
             glMatrixMode(GL_TEXTURE);
             glLoadIdentity();
-            glScalef(1.0f/w, -1.0f/h, 1);
-            glTranslatef(-x, -y, 0);
+            glScalef(mWidthScale, mHeightScale, 1);
+            glTranslatef(-x, mYOffset - y, 0);
             glEnableClientState(GL_TEXTURE_COORD_ARRAY);
             glVertexPointer(2, GL_FIXED, 0, mVertices);
             glTexCoordPointer(2, GL_FIXED, 0, mVertices);
@@ -205,6 +227,7 @@
                 glScissor(r.left, sy, r.width(), r.height());
                 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
             }       
+            glDisableClientState(GL_TEXTURE_COORD_ARRAY);
         } else {
             // NOTE: this is marginally faster with the software gl, because
             // glReadPixels() reads the fb bottom-to-top, however we'll
@@ -221,8 +244,6 @@
             }
         }
     }
-
-    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 }
 
 // ---------------------------------------------------------------------------
diff --git a/libs/surfaceflinger/LayerBlur.h b/libs/surfaceflinger/LayerBlur.h
index 0c3e6eb..bf36ae4 100644
--- a/libs/surfaceflinger/LayerBlur.h
+++ b/libs/surfaceflinger/LayerBlur.h
@@ -56,6 +56,9 @@
     mutable bool    mAutoRefreshPending;
             nsecs_t mCacheAge;
     mutable GLuint  mTextureName;
+    mutable GLfloat mWidthScale;
+    mutable GLfloat mHeightScale;
+    mutable GLfloat mYOffset;
 };
 
 // ---------------------------------------------------------------------------