Index: uspace/lib/display/test/display.c
===================================================================
--- uspace/lib/display/test/display.c	(revision 46a47c0ecde5eec9824d8b22b70d9238a2b3a58e)
+++ uspace/lib/display/test/display.c	(revision b0ae23fe23288a6b5e26debedde1069676c9544e)
@@ -63,5 +63,5 @@
 static errno_t test_window_get_max_rect(void *, sysarg_t, gfx_rect_t *);
 static errno_t test_window_resize_req(void *, sysarg_t, display_wnd_rsztype_t,
-    gfx_coord2_t *);
+    gfx_coord2_t *, sysarg_t);
 static errno_t test_window_resize(void *, sysarg_t, gfx_coord2_t *,
     gfx_rect_t *);
@@ -141,4 +141,5 @@
 	display_wnd_rsztype_t resize_req_rsztype;
 	gfx_coord2_t resize_req_pos;
+	sysarg_t resize_req_pos_id;
 
 	bool window_resize_called;
@@ -831,4 +832,5 @@
 	display_wnd_rsztype_t rsztype;
 	gfx_coord2_t pos;
+	sysarg_t pos_id;
 
 	async_set_fallback_port_handler(test_display_conn, &resp);
@@ -863,6 +865,7 @@
 	pos.x = 42;
 	pos.y = 43;
-
-	rc = display_window_resize_req(wnd, rsztype, &pos);
+	pos_id = 44;
+
+	rc = display_window_resize_req(wnd, rsztype, &pos, pos_id);
 	PCUT_ASSERT_TRUE(resp.window_resize_req_called);
 	PCUT_ASSERT_ERRNO_VAL(resp.rc, rc);
@@ -871,4 +874,5 @@
 	PCUT_ASSERT_INT_EQUALS(pos.x, resp.resize_req_pos.x);
 	PCUT_ASSERT_INT_EQUALS(pos.y, resp.resize_req_pos.y);
+	PCUT_ASSERT_INT_EQUALS(pos_id, resp.resize_req_pos_id);
 
 	display_window_destroy(wnd);
@@ -889,4 +893,5 @@
 	display_wnd_rsztype_t rsztype;
 	gfx_coord2_t pos;
+	sysarg_t pos_id;
 
 	async_set_fallback_port_handler(test_display_conn, &resp);
@@ -921,6 +926,7 @@
 	pos.x = 42;
 	pos.y = 43;
-
-	rc = display_window_resize_req(wnd, rsztype, &pos);
+	pos_id = 44;
+
+	rc = display_window_resize_req(wnd, rsztype, &pos, pos_id);
 	PCUT_ASSERT_TRUE(resp.window_resize_req_called);
 	PCUT_ASSERT_ERRNO_VAL(resp.rc, rc);
@@ -929,4 +935,5 @@
 	PCUT_ASSERT_INT_EQUALS(pos.x, resp.resize_req_pos.x);
 	PCUT_ASSERT_INT_EQUALS(pos.y, resp.resize_req_pos.y);
+	PCUT_ASSERT_INT_EQUALS(pos_id, resp.resize_req_pos_id);
 
 	display_window_destroy(wnd);
@@ -2188,5 +2195,5 @@
 
 static errno_t test_window_resize_req(void *arg, sysarg_t wnd_id,
-    display_wnd_rsztype_t rsztype, gfx_coord2_t *pos)
+    display_wnd_rsztype_t rsztype, gfx_coord2_t *pos, sysarg_t pos_id)
 {
 	test_response_t *resp = (test_response_t *) arg;
@@ -2196,4 +2203,5 @@
 	resp->resize_req_wnd_id = wnd_id;
 	resp->resize_req_pos = *pos;
+	resp->resize_req_pos_id = pos_id;
 	return resp->rc;
 }