diff -Nru lxdm-0.3.0/debian/changelog lxdm-0.3.0/debian/changelog
--- lxdm-0.3.0/debian/changelog	2011-03-16 18:28:50.000000000 +0000
+++ lxdm-0.3.0/debian/changelog	2011-03-17 19:16:38.000000000 +0000
@@ -1,10 +1,10 @@
-lxdm (0.3.0-0ubuntu5~ppa5) maverick; urgency=low
+lxdm (0.3.0-0ubuntu5~ppa8) maverick; urgency=low
 
-  * debian/patches/17_remove_expose.patch
-   - Remove expose-event which have a high CPU usage and bad behavior when
-     drawing the background. (LP: #733912, #703658)
+  * debian/patches/90_simple_expose.patch
+   - From upstream, re-work the expose-event callback which have a high CPU
+     usage and bad behavior when drawing the background. (LP: #733912, #703658)
 
- -- Julien Lavergne <gilir@ubuntu.com>  Tue, 15 Mar 2011 17:04:38 +0100
+ -- Julien Lavergne <gilir@ubuntu.com>  Thu, 17 Mar 2011 20:16:17 +0100
 
 lxdm (0.3.0-0ubuntu4) natty; urgency=low
 
diff -Nru lxdm-0.3.0/debian/patches/90_simple_expose.patch lxdm-0.3.0/debian/patches/90_simple_expose.patch
--- lxdm-0.3.0/debian/patches/90_simple_expose.patch	1970-01-01 00:00:00.000000000 +0000
+++ lxdm-0.3.0/debian/patches/90_simple_expose.patch	2011-03-17 18:14:18.000000000 +0000
@@ -0,0 +1,48 @@
+From a568d0aa03e75fff2ca01fb3672fcd5e9ecba7a2 Mon Sep 17 00:00:00 2001
+From: dgod <dgod.osa@gmail.com>
+Date: Fri, 18 Mar 2011 00:51:26 +0800
+Subject: [PATCH] use less cpu in gtk greeter by only repaint the invalid area and remove scale useless
+
+---
+ src/greeter.c |   15 +++++----------
+ 1 files changed, 5 insertions(+), 10 deletions(-)
+
+Index: lxdm-0.3.0/src/greeter.c
+===================================================================
+--- lxdm-0.3.0.orig/src/greeter.c	2011-03-17 19:13:59.000000000 +0100
++++ lxdm-0.3.0/src/greeter.c	2011-03-17 19:14:11.000000000 +0100
+@@ -441,6 +441,7 @@
+ static gboolean on_expose(GtkWidget* widget, GdkEventExpose* evt, gpointer user_data)
+ {
+     cairo_t *cr;
++	GdkRectangle *r=&evt->area;
+ 
+ #if GTK_CHECK_VERSION(2,18,0)
+     if(! gtk_widget_get_has_window(widget))
+@@ -453,22 +454,16 @@
+ #else
+     cr = gdk_cairo_create(widget->window);
+ #endif
+-    if( bg_img )
++    if(bg_img )
+     {
+-        cairo_matrix_t matrix;
+-        double x = 0, y = 0, sx, sy;
+-        cairo_get_matrix(cr, &matrix);
+-        sx = (double)gdk_screen_width() / (double)gdk_pixbuf_get_width(bg_img);
+-        sy = (double)gdk_screen_height() / (double)gdk_pixbuf_get_height(bg_img);
+-        cairo_scale(cr, sx, sy);
+-        gdk_cairo_set_source_pixbuf(cr, bg_img, x, y);
++        gdk_cairo_set_source_pixbuf(cr, bg_img, 0, 0);
++        gdk_cairo_rectangle (cr,r);
+         cairo_paint(cr);
+-        cairo_set_matrix(cr, &matrix);
+     }
+     else
+     {
+         gdk_cairo_set_source_color(cr, &bg_color);
+-        cairo_rectangle( cr, 0, 0, gdk_screen_width(), gdk_screen_height() );
++        gdk_cairo_rectangle (cr,r);
+         cairo_fill(cr);
+     }
+     cairo_destroy(cr);
diff -Nru lxdm-0.3.0/debian/patches/series lxdm-0.3.0/debian/patches/series
--- lxdm-0.3.0/debian/patches/series	2011-03-16 18:17:49.000000000 +0000
+++ lxdm-0.3.0/debian/patches/series	2011-03-17 18:14:09.000000000 +0000
@@ -2,5 +2,5 @@
 lxdm.conf_greeter_path_fix.patch
 15-path-replace.patch
 16_gtk3_migration.patch
-17_remove_expose.patch
 80_translations.patch
+90_simple_expose.patch