diff --git a/libweston-desktop/xdg-shell-v5.c b/libweston-desktop/xdg-shell-v5.c
index b32b781..c91c259 100644
--- a/libweston-desktop/xdg-shell-v5.c
+++ b/libweston-desktop/xdg-shell-v5.c
@@ -46,6 +46,13 @@
 	bool activated;
 };
 
+struct weston_desktop_xdg_surface_configure {
+	struct wl_list link; /* weston_desktop_xdg_surface::configure_list */
+	uint32_t serial;
+	struct weston_desktop_xdg_surface_state state;
+	struct weston_size size;
+};
+
 struct weston_desktop_xdg_surface {
 	struct wl_resource *resource;
 	struct weston_desktop_surface *surface;
@@ -53,7 +60,7 @@
 	bool added;
 	struct wl_event_source *add_idle;
 	struct wl_event_source *configure_idle;
-	uint32_t configure_serial;
+	struct wl_list configure_list; /* weston_desktop_xdg_surface_configure::link */
 	struct {
 		struct weston_desktop_xdg_surface_state state;
 		struct weston_size size;
@@ -94,13 +101,26 @@
 weston_desktop_xdg_surface_send_configure(void *data)
 {
 	struct weston_desktop_xdg_surface *surface = data;
+	struct weston_desktop_xdg_surface_configure *configure;
 	uint32_t *s;
 	struct wl_array states;
 
 	surface->configure_idle = NULL;
 
-	surface->configure_serial =
+	configure = zalloc(sizeof(struct weston_desktop_xdg_surface_configure));
+	if (configure == NULL) {
+		struct weston_desktop_client *client =
+			weston_desktop_surface_get_client(surface->surface);
+		struct wl_client *wl_client =
+			weston_desktop_client_get_client(client);
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
+	wl_list_insert(surface->configure_list.prev, &configure->link);
+	configure->serial =
 		wl_display_next_serial(weston_desktop_get_display(surface->desktop));
+	configure->state = surface->pending.state;
+	configure->size = surface->pending.size;
 
 	wl_array_init(&states);
 	if (surface->pending.state.maximized) {
@@ -124,7 +144,7 @@
 				   surface->pending.size.width,
 				   surface->pending.size.height,
 				   &states,
-				   surface->configure_serial);
+				   configure->serial);
 
 	wl_array_release(&states);
 };
@@ -325,6 +345,7 @@
 				   void *user_data)
 {
 	struct weston_desktop_xdg_surface *surface = user_data;
+	struct weston_desktop_xdg_surface_configure *configure, *temp;
 
 	if (surface->added)
 		weston_desktop_api_surface_removed(surface->desktop,
@@ -336,6 +357,9 @@
 	if (surface->configure_idle != NULL)
 		wl_event_source_remove(surface->configure_idle);
 
+	wl_list_for_each_safe(configure, temp, &surface->configure_list, link)
+		free(configure);
+
 	free(surface);
 }
 
@@ -443,12 +467,34 @@
 		wl_resource_get_user_data(resource);
 	struct weston_desktop_xdg_surface *surface =
 		weston_desktop_surface_get_implementation_data(dsurface);
+	struct weston_desktop_xdg_surface_configure *configure, *temp;
+	bool found = false;
 
-	if (surface->configure_serial != serial)
+	wl_list_for_each_safe(configure, temp, &surface->configure_list, link) {
+		if (configure->serial < serial) {
+			wl_list_remove(&configure->link);
+			free(configure);
+		} else if (configure->serial == serial) {
+			wl_list_remove(&configure->link);
+			found = true;
+		}
+		break;
+	}
+	if (!found) {
+		struct weston_desktop_client *client =
+			weston_desktop_surface_get_client(dsurface);
+		struct wl_resource *client_resource =
+			weston_desktop_client_get_resource(client);
+		wl_resource_post_error(client_resource,
+				       XDG_SHELL_ERROR_DEFUNCT_SURFACES,
+				       "Wrong configure serial: %u", serial);
 		return;
+	}
 
-	surface->next.state = surface->pending.state;
-	surface->next.size = surface->pending.size;
+	surface->next.state = configure->state;
+	surface->next.size = configure->size;
+
+	free(configure);
 }
 
 static void
diff --git a/libweston-desktop/xdg-shell-v6.c b/libweston-desktop/xdg-shell-v6.c
index f5e46da..de5d3e0 100644
--- a/libweston-desktop/xdg-shell-v6.c
+++ b/libweston-desktop/xdg-shell-v6.c
@@ -69,7 +69,7 @@
 	struct weston_desktop_surface *desktop_surface;
 	bool configured;
 	struct wl_event_source *configure_idle;
-	uint32_t configure_serial;
+	struct wl_list configure_list; /* weston_desktop_xdg_surface_configure::link */
 
 	bool has_next_geometry;
 	struct weston_geometry next_geometry;
@@ -77,6 +77,11 @@
 	enum weston_desktop_xdg_surface_role role;
 };
 
+struct weston_desktop_xdg_surface_configure {
+	struct wl_list link; /* weston_desktop_xdg_surface::configure_list */
+	uint32_t serial;
+};
+
 struct weston_desktop_xdg_toplevel_state {
 	bool maximized;
 	bool fullscreen;
@@ -84,6 +89,12 @@
 	bool activated;
 };
 
+struct weston_desktop_xdg_toplevel_configure {
+	struct weston_desktop_xdg_surface_configure base;
+	struct weston_desktop_xdg_toplevel_state state;
+	struct weston_size size;
+};
+
 struct weston_desktop_xdg_toplevel {
 	struct weston_desktop_xdg_surface base;
 
@@ -115,6 +126,7 @@
 };
 
 #define weston_desktop_surface_role_biggest_size (sizeof(struct weston_desktop_xdg_toplevel))
+#define weston_desktop_surface_configure_biggest_size (sizeof(struct weston_desktop_xdg_toplevel))
 
 
 static struct weston_geometry
@@ -422,10 +434,11 @@
 }
 
 static void
-weston_desktop_xdg_toplevel_ack_configure(struct weston_desktop_xdg_toplevel *toplevel)
+weston_desktop_xdg_toplevel_ack_configure(struct weston_desktop_xdg_toplevel *toplevel,
+					  struct weston_desktop_xdg_toplevel_configure *configure)
 {
-	toplevel->next.state = toplevel->pending.state;
-	toplevel->next.size = toplevel->pending.size;
+	toplevel->next.state = configure->state;
+	toplevel->next.size = configure->size;
 }
 
 static void
@@ -529,11 +542,15 @@
 }
 
 static void
-weston_desktop_xdg_toplevel_send_configure(struct weston_desktop_xdg_toplevel *toplevel)
+weston_desktop_xdg_toplevel_send_configure(struct weston_desktop_xdg_toplevel *toplevel,
+					   struct weston_desktop_xdg_toplevel_configure *configure)
 {
 	uint32_t *s;
 	struct wl_array states;
 
+	configure->state = toplevel->pending.state;
+	configure->size = toplevel->pending.size;
+
 	wl_array_init(&states);
 	if (toplevel->pending.state.maximized) {
 		s = wl_array_add(&states, sizeof(uint32_t));
@@ -848,9 +865,21 @@
 weston_desktop_xdg_surface_send_configure(void *user_data)
 {
 	struct weston_desktop_xdg_surface *surface = user_data;
+	struct weston_desktop_xdg_surface_configure *configure;
 
 	surface->configure_idle = NULL;
-	surface->configure_serial =
+
+	configure = zalloc(weston_desktop_surface_configure_biggest_size);
+	if (configure == NULL) {
+		struct weston_desktop_client *client =
+			weston_desktop_surface_get_client(surface->desktop_surface);
+		struct wl_client *wl_client =
+			weston_desktop_client_get_client(client);
+		wl_client_post_no_memory(wl_client);
+		return;
+	}
+	wl_list_insert(surface->configure_list.prev, &configure->link);
+	configure->serial =
 		wl_display_next_serial(weston_desktop_get_display(surface->desktop));
 
 	switch (surface->role) {
@@ -858,14 +887,15 @@
 		assert(0 && "not reached");
 		break;
 	case WESTON_DESKTOP_XDG_SURFACE_ROLE_TOPLEVEL:
-		weston_desktop_xdg_toplevel_send_configure((struct weston_desktop_xdg_toplevel *) surface);
+		weston_desktop_xdg_toplevel_send_configure((struct weston_desktop_xdg_toplevel *) surface,
+							   (struct weston_desktop_xdg_toplevel_configure *) configure);
 		break;
 	case WESTON_DESKTOP_XDG_SURFACE_ROLE_POPUP:
 		weston_desktop_xdg_popup_send_configure((struct weston_desktop_xdg_popup *) surface);
 		break;
 	}
 
-	zxdg_surface_v6_send_configure(surface->resource, surface->configure_serial);
+	zxdg_surface_v6_send_configure(surface->resource, configure->serial);
 }
 
 static bool
@@ -1060,12 +1090,32 @@
 		wl_resource_get_user_data(resource);
 	struct weston_desktop_xdg_surface *surface =
 		weston_desktop_surface_get_implementation_data(dsurface);
+	struct weston_desktop_xdg_surface_configure *configure, *temp;
+	bool found = false;
 
 	if (!weston_desktop_xdg_surface_check_role(surface))
 		return;
 
-	if (surface->configure_serial != serial)
+	wl_list_for_each_safe(configure, temp, &surface->configure_list, link) {
+		if (configure->serial < serial) {
+			wl_list_remove(&configure->link);
+			free(configure);
+		} else if (configure->serial == serial) {
+			wl_list_remove(&configure->link);
+			found = true;
+		}
+		break;
+	}
+	if (!found) {
+		struct weston_desktop_client *client =
+			weston_desktop_surface_get_client(dsurface);
+		struct wl_resource *client_resource =
+			weston_desktop_client_get_resource(client);
+		wl_resource_post_error(client_resource,
+				       ZXDG_SHELL_V6_ERROR_INVALID_SURFACE_STATE,
+				       "Wrong configure serial: %u", serial);
 		return;
+	}
 
 	surface->configured = true;
 
@@ -1074,11 +1124,14 @@
 		assert(0 && "not reached");
 		break;
 	case WESTON_DESKTOP_XDG_SURFACE_ROLE_TOPLEVEL:
-		weston_desktop_xdg_toplevel_ack_configure((struct weston_desktop_xdg_toplevel *) surface);
+		weston_desktop_xdg_toplevel_ack_configure((struct weston_desktop_xdg_toplevel *) surface,
+							  (struct weston_desktop_xdg_toplevel_configure *) configure);
 		break;
 	case WESTON_DESKTOP_XDG_SURFACE_ROLE_POPUP:
 		break;
 	}
+
+	free(configure);
 }
 
 static void
@@ -1153,6 +1206,7 @@
 				   void *user_data)
 {
 	struct weston_desktop_xdg_surface *surface = user_data;
+	struct weston_desktop_xdg_surface_configure *configure, *temp;
 
 	switch (surface->role) {
 	case WESTON_DESKTOP_XDG_SURFACE_ROLE_NONE:
@@ -1168,6 +1222,9 @@
 	if (surface->configure_idle != NULL)
 		wl_event_source_remove(surface->configure_idle);
 
+	wl_list_for_each_safe(configure, temp, &surface->configure_list, link)
+		free(configure);
+
 	free(surface);
 }
 
@@ -1290,6 +1347,8 @@
 				       "xdg_surface must not have a buffer at creation");
 		return;
 	}
+
+	wl_list_init(&surface->configure_list);
 }
 
 static void