diff --git a/include/gui/Surface.h b/include/gui/Surface.h
index 8217652..a9f78cf 100644
--- a/include/gui/Surface.h
+++ b/include/gui/Surface.h
@@ -298,12 +298,12 @@
     sp<GraphicBuffer>           mPostedBuffer;
     bool                        mConnectedToCpu;
 
-    // In the lock/unlock context, this reflects the region that the producer
-    // wished to update and whether the Surface was able to copy the previous
-    // buffer back to allow a partial update.
+    // When a CPU producer is attached, this reflects the region that the
+    // producer wished to update as well as whether the Surface was able to copy
+    // the previous buffer back to allow a partial update.
     //
-    // In the dequeue/queue context, this reflects the surface damage (the
-    // damage since the last frame) passed in by the producer.
+    // When a non-CPU producer is attached, this reflects the surface damage
+    // (the change since the previous frame) passed in by the producer.
     Region mDirtyRegion;
 };
 
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 245f7a3..b8acad2 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -322,7 +322,7 @@
             mDataSpace, crop, mScalingMode, mTransform ^ mStickyTransform,
             mSwapIntervalZero, fence, mStickyTransform);
 
-    if (mDirtyRegion.bounds() == Rect::INVALID_RECT) {
+    if (mConnectedToCpu || mDirtyRegion.bounds() == Rect::INVALID_RECT) {
         input.setSurfaceDamage(Region::INVALID_REGION);
     } else {
         // The surface damage was specified using the OpenGL ES convention of
@@ -356,8 +356,10 @@
 
     mConsumerRunningBehind = (numPendingBuffers >= 2);
 
-    // Clear surface damage back to full-buffer
-    mDirtyRegion = Region::INVALID_REGION;
+    if (!mConnectedToCpu) {
+        // Clear surface damage back to full-buffer
+        mDirtyRegion = Region::INVALID_REGION;
+    }
 
     return err;
 }
@@ -844,7 +846,7 @@
     ALOGV("Surface::setSurfaceDamage");
     Mutex::Autolock lock(mMutex);
 
-    if (numRects == 0) {
+    if (mConnectedToCpu || numRects == 0) {
         mDirtyRegion = Region::INVALID_REGION;
         return;
     }