diff --git a/modules/Gpx/Gpx.c b/modules/Gpx/Gpx.c
index ed0fef2..3506518 100644
--- a/modules/Gpx/Gpx.c
+++ b/modules/Gpx/Gpx.c
@@ -420,7 +420,6 @@ static void Copy() {
 	
 	DEBUG_COMMAND("Gpx.Copy %d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, ss, sx, sy, sw, sh);
 	
-	ags_sync();
 	src = sf_get(ss);
 	dst = sf_get(ds);
 	gr_copy(dst, dx, dy, src, sx, sy, sw, sh);
@@ -465,7 +464,6 @@ static void CopyAMap() {
 	
 	DEBUG_COMMAND("Gpx.CopyAMap %d,%d,%d,%d,%d,%d,%d,%d:\n", da, dx, dy, sa, sx, sy, sw, sh);
 	
-	ags_sync();
 	src = sf_get(sa);
 	dst = sf_get(da);
 	gr_copy_alpha_map(dst, dx, dy, src, sx, sy, sw, sh);
@@ -538,7 +536,6 @@ static void BlendAMap() {
 	
 	DEBUG_COMMAND("Gpx.BlendAMap %d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, ss, sx, sy, sw, sh);
 	
-	ags_sync();
 	src = sf_get(ss);
 	dst = sf_get(ds);
 	gr_blend_alpha_map(dst, dx, dy, src, sx, sy, sw, sh);
@@ -715,7 +712,6 @@ static void Fill() {
 	
 	DEBUG_COMMAND("Gpx.Fill %d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, dw, dh, r, g, b);
 	
-	ags_sync();
 	dst = sf_get(ds);
 	gr_fill(dst, dx, dy, dw, dh, r, g, b);
 }
@@ -734,7 +730,6 @@ static void FillAlphaColor() { /* not used ? */
 	
 	DEBUG_COMMAND_YET("Gpx.FillAlphaColor %d,%d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, dw, dh, r, g, b, lv);
 
-	ags_sync();
 	dst = sf_get(ds);
 	gr_fill_alpha_color(dst, dx, dy, dw, dh, r, g, b, lv);
 }
@@ -856,7 +851,6 @@ static void SpriteCopyAMap() {
 	
 	DEBUG_COMMAND("Gpx.SpriteCopyAMap %d,%d,%d,%d,%d,%d,%d,%d,%d:\n", da, dx, dy, sa, sx, sy, sw, sh, cl);
 	
-	ags_sync();
 	src = sf_get(sa);
 	dst = sf_get(da);
 	gr_copy_alpha_map_sprite(dst, dx, dy, src, sx, sy, sw, sh, cl);
@@ -884,7 +878,6 @@ static void BrightDestOnly() {
 	
 	DEBUG_COMMAND("Gpx.BrightDestOnly %d,%d,%d,%d,%d,%d:\n", ds, dx, dy, dw, dh, r);
 	
-	ags_sync();
 	dst = sf_get(ds);
 	
 	gr_bright_dst_only(dst, dx, dy, dw, dh, r);
@@ -1004,7 +997,6 @@ static void CopyStretchBlendAMap() {
 	
 	DEBUG_COMMAND("Gpx.CopyStretchBlendAMap %d,%d,%d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, dw, dh, ss, sx, sy, sw, sh);
 
-	ags_sync();
 	src = sf_get(ss);
 	dst = sf_get(ds);
 	gr_copy_stretch_blend_alpha_map(dst, dx, dy, dw, dh, src, sx, sy, sw, sh);
@@ -1056,7 +1048,6 @@ static void StretchBlendScreen2x2WDS() {
 	
 	DEBUG_COMMAND("Gpx.StretchBlendScreen2x2WDS %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, ss1, sx1, sy1, ss2, sx2, sy2, sw, sh);
 	
-	ags_sync();
 	src1 = sf_get(ss1);
 	src2 = sf_get(ss2);
 	dst  = sf_get(ds);
@@ -1094,7 +1085,6 @@ static void BlendScreenWDS() {
 	
 	DEBUG_COMMAND("Gpx.BlendScreenWDS %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d:\n", ds, dx, dy, ss1, sx1, sy1, ss2, sx2, sy2, sw, sh);
 	
-	ags_sync();
 	src1 = sf_get(ss1);
 	src2 = sf_get(ss2);
 	dst  = sf_get(ds);
@@ -1161,7 +1151,6 @@ static void EffectCopy() {
 	default:
 		DEBUG_COMMAND_YET("Gpx.EffectCopy %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%p:\n", no, dx, dy, ss1, sx1, sy1, ss2, sx2, sy2, sw, sh, time, var);
 	}
-	ags_sync();
 	dib = sf_get(0);
 	dst = sf_get(ss1);
 	src = sf_get(ss2);
diff --git a/modules/NIGHTDLL/nt_graph.c b/modules/NIGHTDLL/nt_graph.c
index ac441f7..1b13fe7 100644
--- a/modules/NIGHTDLL/nt_graph.c
+++ b/modules/NIGHTDLL/nt_graph.c
@@ -193,8 +193,6 @@ void nt_gr_draw(int effectno) {
 void nt_gr_screencg(int no, int x, int y) {
 	surface_t *sf;
 	
-	ags_sync();
-	
 	sf = sf_loadcg_no(no -1);
 	
 	gre_BlendScreen(sf0, x, y, sf0, x, y, sf, 0, 0, sf->width, sf->height);
diff --git a/modules/ShGraph/ShGraph.c b/modules/ShGraph/ShGraph.c
index c2b6351..1993c60 100644
--- a/modules/ShGraph/ShGraph.c
+++ b/modules/ShGraph/ShGraph.c
@@ -142,7 +142,6 @@ static void ChangeNotColor() {
 	DEBUG_COMMAND("ShGraph.ChangeNotColor %d,%d,%d,%d,%p,%p,%d:\n", x0, y0, width, height, src, dst, p7);
 	
 	ags_check_param(&x0, &y0, &width, &height);
-	ags_sync();
 	
 	dib = nact->ags.dib;
 	dp = GETOFFSET_PIXEL(dib, x0, y0);
@@ -508,7 +507,6 @@ static void PlayAnimeData() {
 					ags_copyArea(mapback.x, mapback.y,
 						     mapback.width, mapback.height,
 						     mapback_p5, mapback_p6);
-					ags_sync();
 				}
 				
 				if (wavno != 0) {
diff --git a/src/ags.c b/src/ags.c
index 582a91a..ccb2e24 100644
--- a/src/ags.c
+++ b/src/ags.c
@@ -849,9 +849,6 @@ agsurface_t *ags_getDIB() {
 	return nact->ags.dib;
 }
 
-void ags_sync() {
-}
-
 void ags_fillRectangleNeg(int x, int y, int w, int h, int col) {
 	if (!check_param(&x, &y, &w, &h)) return;
 	
diff --git a/src/ags.h b/src/ags.h
index 3d1dd5e..e126381 100644
--- a/src/ags.h
+++ b/src/ags.h
@@ -155,7 +155,6 @@ extern boolean ags_check_param(int *x, int *y, int *w, int *h);
 extern boolean ags_check_param_xy(int *x, int *y);
 extern void    ags_intersection(MyRectangle *r1, MyRectangle *r2, MyRectangle *rst);
 extern agsurface_t *ags_getDIB();
-extern void ags_sync();
 
 /* 画面更新 */
 extern void ags_setExposeSwitch(boolean bool);
diff --git a/src/ecopy.c b/src/ecopy.c
index 83bfb7a..4791b6e 100644
--- a/src/ecopy.c
+++ b/src/ecopy.c
@@ -1209,7 +1209,6 @@ void ags_eCopyArea(int sx, int sy, int w, int h, int dx, int dy, int sw, int opt
 	int ret = 0;
 	ags_faderinfo_t i;
 
-	ags_sync();
 #if 0
 	NOTICE("ec_area sx %d sy %d w %d h %d dx %d dy %d sw %d opt %d spc %d cancel %s\n",
 	       sx, sy, w, h, dx, dy, sw, opt, spCol, cancel ? "True" : "False");