--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -2264,17 +2264,17 @@ nsWindow::OnExposeEvent(cairo_t *cr)
                 ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
                 ctx->SetPattern(pattern);
                 ctx->Paint();
             }
         }
     }
 #  ifdef MOZ_HAVE_SHMIMAGE
     if (mShmImage && MOZ_LIKELY(!mIsDestroyed)) {
-        mShmImage->Put(mGdkWindow, exposeRegion);
+        mShmImage->Put(mGdkWindow, region);
     }
 #  endif  // MOZ_HAVE_SHMIMAGE
 #endif // MOZ_X11
 
     listener->DidPaintWindow();
 
     // Synchronously flush any new dirty areas
 #if (MOZ_WIDGET_GTK == 2)
@@ -6173,21 +6173,16 @@ nsWindow::EndRemoteDrawingInRegion(DrawT
   if (!mGdkWindow || mIsFullyObscured || !mHasMappedToplevel || mIsDestroyed ||
       !mShmImage)
     return;
 
   if (mThebesSurface) {
     aInvalidRegion.AndWith(nsIntRect(nsIntPoint(0, 0), mThebesSurface->GetSize()));
   }
 
-  gint scale = GdkScaleFactor();
-  if (scale != 1) {
-    aInvalidRegion.ScaleInverseRoundOut(scale, scale);
-  }
-
   mShmImage->Put(mGdkWindow, aInvalidRegion);
 
 #  endif // MOZ_HAVE_SHMIMAGE
 #endif // MOZ_X11
 }
 
 // return the gfxASurface for rendering to this widget
 gfxASurface*