diff --git a/src/newgal/commlcd/axlinux_c33l05.c b/src/newgal/commlcd/axlinux_c33l05.c
index 41c31b75..feb5bb98 100644
--- a/src/newgal/commlcd/axlinux_c33l05.c
+++ b/src/newgal/commlcd/axlinux_c33l05.c
@@ -229,7 +229,8 @@ struct commlcd_ops __mg_commlcd_ops = {
     L2F50113T00_open,
     L2F50113T00_getscreeninfo,
     L2F50113T00_close,
-    L2F50113T00_setpalette
+    L2F50113T00_setpalette,
+    NULL
 };
 
 #endif /* __TARGET_C33L05__ */
diff --git a/src/newgal/commlcd/commlcd.c b/src/newgal/commlcd/commlcd.c
index cb01bc0b..32ee4d30 100644
--- a/src/newgal/commlcd/commlcd.c
+++ b/src/newgal/commlcd/commlcd.c
@@ -76,7 +76,60 @@ static void COMMLCD_DeleteDevice(GAL_VideoDevice *device)
     free (device);
 }
 
-static GAL_VideoDevice *COMMLCD_CreateDevice(int devindex)
+static void* task_do_update (void* data)
+{
+    _THIS;
+    this = data;
+
+    while (1) {
+        pthread_mutex_lock (&this->hidden->update_lock);
+        if (this->hidden->dirty) {
+            __mg_commlcd_ops.update (&this->hidden->ditry_rect);
+
+            SetRect (&this->hidden->ditry_rect, 0, 0, 0, 0);
+            this->hidden->dirty = FALSE;
+        }
+        pthread_mutex_unlock (&this->hidden->update_lock);
+        usleep (50*1000) /* 50 ms */
+    }
+
+    return NULL;
+}
+
+static void COMMLCD_UpdateRects (_THIS, int numrects, GAL_Rect *rects)
+{
+    int i;
+    RECT bound;
+
+    if (__mg_commlcd_ops.update == NULL) {
+        return;
+    }
+
+    pthread_mutex_lock (&this->hidden->update_lock);
+
+    bound = this->hidden->rc_dirty;
+    for (i = 0; i < numrects; i++) {
+        RECT rc;
+        SetRect (&rc, rects[i].x, rects[i].y, 
+                rects[i].x + rects[i].w, rects[i].y + rects[i].h);
+        if (IsRectEmpty (&bound))
+            bound = rc;
+        else
+            GetBoundRect (&bound, &bound, &rc);
+    }
+
+    if (!IsRectEmpty (&bound)) {
+        if (IntersectRect (&bound, &bound, &g_rcScr)) {
+            this->hidden->rc_dirty = bound;
+            this->hidden->dirty = TRUE;
+        }
+    }
+
+    pthread_mutex_unlock (&this->hidden->update_lock);
+    return;
+}
+
+static GAL_VideoDevice *COMMLCD_CreateDevice (int devindex)
 {
     GAL_VideoDevice *device;
 
@@ -111,6 +164,7 @@ static GAL_VideoDevice *COMMLCD_CreateDevice(int devindex)
     device->SetHWColorKey = NULL;
     device->SetHWAlpha = NULL;
     device->FreeHWSurface = COMMLCD_FreeHWSurface;
+    device->UpdateRects = COMMLCD_UpdateRects;
     
     device->free = COMMLCD_DeleteDevice;
     return device;
@@ -175,16 +229,30 @@ static GAL_Surface *COMMLCD_SetVideoMode(_THIS, GAL_Surface *current,
     current->pitch = this->hidden->pitch;
     current->pixels = this->hidden->fb;
 
+    if (__mg_commlcd_ops.update) {
+        pthread_attr_t new_attr;
+
+        pthread_attr_init (&new_attr);
+        pthread_attr_setdetachstate (&new_attr, PTHREAD_CREATE_DETACHED);
+        ret = pthread_create (&this->hidden->update_th, &new_attr, 
+                        task_do_update, this);
+        pthread_attr_destroy (&new_attr);
+    }
+
     /* We're done */
     return current;
 }
 
-static void COMMLCD_VideoQuit(_THIS)
+static void COMMLCD_VideoQuit (_THIS)
 {
     if (this->screen && this->screen->pixels) {
         this->screen->pixels = NULL;
     }
 
+    if (__mg_commlcd_ops.update) {
+        /* quit the update task */
+    }
+
     if (__mg_commlcd_ops.release)
         __mg_commlcd_ops.release ();
 
@@ -194,7 +262,7 @@ static void COMMLCD_VideoQuit(_THIS)
 static GAL_Rect **COMMLCD_ListModes (_THIS, GAL_PixelFormat *format, 
                 Uint32 flags)
 {
-        return (GAL_Rect **) -1;
+    return (GAL_Rect **) -1;
 }
 
 /* We don't actually allow hardware surfaces other than the main one */
diff --git a/src/newgal/commlcd/commlcd.h b/src/newgal/commlcd/commlcd.h
index 158458ef..1ad019fb 100644
--- a/src/newgal/commlcd/commlcd.h
+++ b/src/newgal/commlcd/commlcd.h
@@ -49,6 +49,11 @@ extern "C" {
 struct GAL_PrivateVideoData {
     int w, h, pitch;
     void *fb;
+
+    int dirty;
+    RECT rc_dirty;
+    pthread_t update_th;
+    pthread_mutex_t update_lock;
 };
 
 /* The pixel format defined by depth */
@@ -76,6 +81,8 @@ struct commlcd_ops {
     int (*release) (void);
     /* return value: number set, zero on error */
     int (*setclut) (int firstcolor, int ncolors, GAL_Color *colors);
+    /* return value: number set, zero on error */
+    int (*update) (const RECT* rc_dirty);
 };
 
 extern struct commlcd_ops __mg_commlcd_ops;
diff --git a/src/newgal/commlcd/ecos_generic.c b/src/newgal/commlcd/ecos_generic.c
index 211661db..a1137ee1 100644
--- a/src/newgal/commlcd/ecos_generic.c
+++ b/src/newgal/commlcd/ecos_generic.c
@@ -71,6 +71,7 @@ struct commlcd_ops __mg_commlcd_ops = {
     a_init,
     a_getinfo,
     NULL,
+    NULL,
     NULL
 };
 
diff --git a/src/newgal/commlcd/ecos_mv6600.c b/src/newgal/commlcd/ecos_mv6600.c
index c413dd0b..9b387c8c 100644
--- a/src/newgal/commlcd/ecos_mv6600.c
+++ b/src/newgal/commlcd/ecos_mv6600.c
@@ -89,6 +89,7 @@ struct commlcd_ops __mg_commlcd_ops = {
     a_init,
     a_getinfo,
     NULL,
+    NULL,
     NULL
 };
 
diff --git a/src/newgal/commlcd/extern.c b/src/newgal/commlcd/extern.c
index 74785551..97be3541 100644
--- a/src/newgal/commlcd/extern.c
+++ b/src/newgal/commlcd/extern.c
@@ -55,14 +55,15 @@
 extern int __commlcd_drv_init (void);
 extern int __commlcd_drv_getinfo (struct commlcd_info *li);
 extern int __commlcd_drv_release (void);
-extern int __commlcd_drv_setclut (int firstcolor, 
-            int ncolors, GAL_Color *colors);
+extern int __commlcd_drv_setclut (int firstcolor, int ncolors, GAL_Color *colors);
+extern int __commlcd_drv_update (const RECT* rc_dirty);
 
 struct commlcd_ops __mg_commlcd_ops = {
     __commlcd_drv_init,
     __commlcd_drv_getinfo,
     __commlcd_drv_release,
-    __commlcd_drv_setclut
+    __commlcd_drv_setclut,
+    __commlcd_drv_update
 };
 
 #endif
diff --git a/src/newgal/commlcd/ose_mx21.c b/src/newgal/commlcd/ose_mx21.c
index d8ed6500..d1b3445a 100644
--- a/src/newgal/commlcd/ose_mx21.c
+++ b/src/newgal/commlcd/ose_mx21.c
@@ -110,6 +110,7 @@ struct commlcd_ops __mg_commlcd_ops = {
     a_init,
     a_getinfo,
     NULL,
+    NULL,
     NULL
 };
 
diff --git a/src/newgal/commlcd/vxworks_i386.c b/src/newgal/commlcd/vxworks_i386.c
index 4c4a881a..df33d62f 100644
--- a/src/newgal/commlcd/vxworks_i386.c
+++ b/src/newgal/commlcd/vxworks_i386.c
@@ -112,14 +112,15 @@ static int a_setclut (int firstcolor, int ncolors, GAL_Color *colors)
 #endif
 
 struct lcd_ops __mg_commlcd_ops = {
-        a_init,
-        a_getinfo,
-        NULL,
+    a_init,
+    a_getinfo,
+    NULL,
     #ifndef _VESA_SUPPORT    
-        a_setclut
+        a_setclut,
     #else
-        NULL
+        NULL,
     #endif
+    NULL
 };
 
 #endif /* __VXWORKS__ && __TARGET_VXI386__ */
diff --git a/src/newgal/commlcd/vxworks_ppc.c b/src/newgal/commlcd/vxworks_ppc.c
index d347dfbe..c849f3cd 100644
--- a/src/newgal/commlcd/vxworks_ppc.c
+++ b/src/newgal/commlcd/vxworks_ppc.c
@@ -99,10 +99,11 @@ static int a_release(void)
 }
 
 struct lcd_ops __mg_commlcd_ops = {
-        a_init,
-        a_getinfo,
-        a_release,
-        NULL
+    a_init,
+    a_getinfo,
+    a_release,
+    NULL,
+    NULL
 };
 
 #endif /* __VXWORKS__ && __TARGET_PPC__ */
diff --git a/src/newgal/commlcd/win_generic.c b/src/newgal/commlcd/win_generic.c
index f70f40bc..e2a096ec 100644
--- a/src/newgal/commlcd/win_generic.c
+++ b/src/newgal/commlcd/win_generic.c
@@ -63,7 +63,8 @@ struct commlcd_ops __mg_commlcd_ops = {
     wvfb_drv_lcd_init,
     wvfb_drv_lcd_getinfo,
     NULL,
-    wvfb_drv_setclut 
+    wvfb_drv_setclut,
+    NULL
 };
 
 #endif /* WIN32 && __TARGET_WVFB__ */