Index: xen-3.2-testing/tools/ioemu/vnc.c
===================================================================
--- xen-3.2-testing.orig/tools/ioemu/vnc.c	2008-05-09 12:16:09.000000000 -0600
+++ xen-3.2-testing/tools/ioemu/vnc.c	2008-05-09 12:21:37.000000000 -0600
@@ -244,6 +244,7 @@
 static void vnc_update_client(void *opaque);
 static void vnc_client_read(void *opaque);
 static void framebuffer_set_updated(VncState *vs, int x, int y, int w, int h);
+static void vnc_write_newsize(VncState *vs);
 
 #if 0
 static inline void vnc_set_bit(uint32_t *d, int k)
@@ -356,11 +357,7 @@
     ds->height = h;
     ds->linesize = w * vs->depth;
     if (vs->csock != -1 && vs->has_resize && size_changed) {
-	vnc_write_u8(vs, 0);  /* msg id */
-	vnc_write_u8(vs, 0);
-	vnc_write_u16(vs, 1); /* number of rects */
-	vnc_framebuffer_update(vs, 0, 0, ds->width, ds->height, -223);
-	vnc_flush(vs);
+	vnc_write_newsize(vs);
 	vs->width = ds->width;
 	vs->height = ds->height;
     }
@@ -370,6 +367,15 @@
     framebuffer_set_updated(vs, 0, 0, ds->width, ds->height);
 }
 
+static void vnc_write_newsize(VncState *vs)
+{
+    vnc_write_u8(vs, 0);  /* msg id */
+    vnc_write_u8(vs, 0);
+    vnc_write_u16(vs, 1); /* number of rects */
+    vnc_framebuffer_update(vs, 0, 0, vs->ds->width, vs->ds->height, -223);
+    vnc_flush(vs);
+}
+
 /* fastest code */
 static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size)
 {
@@ -1300,6 +1306,11 @@
 	    break;
 	case -223: /* DesktopResize */
 	    vs->has_resize = 1;
+	    if (vs->width != vs->ds->width || vs->height != vs->ds->height) {
+		vnc_write_newsize(vs);
+		vs->width = vs->ds->width;
+		vs->height = vs->ds->height;
+	    }
 	    break;
 	case -257:
 	    vs->has_pointer_type_change = 1;