diff --git a/xwayland/launcher.c b/xwayland/launcher.c
index 0ecdb205..c5b99385 100644
--- a/xwayland/launcher.c
+++ b/xwayland/launcher.c
@@ -229,6 +229,8 @@ weston_xserver_destroy(struct wl_listener *l, void *data)
 	if (wxs->loop)
 		weston_xserver_shutdown(wxs);
 
+	weston_debug_scope_destroy(wxs->wm_debug);
+
 	free(wxs);
 }
 
@@ -391,5 +393,10 @@ weston_module_init(struct weston_compositor *compositor)
 	wxs->destroy_listener.notify = weston_xserver_destroy;
 	wl_signal_add(&compositor->destroy_signal, &wxs->destroy_listener);
 
+	wxs->wm_debug = weston_compositor_add_debug_scope(wxs->compositor,
+			"xwm-wm-x11",
+			"XWM's window management X11 events\n",
+			NULL, NULL);
+
 	return 0;
 }
diff --git a/xwayland/window-manager.c b/xwayland/window-manager.c
index 4a26f6e7..ccdae57f 100644
--- a/xwayland/window-manager.c
+++ b/xwayland/window-manager.c
@@ -193,23 +193,27 @@ static void
 xserver_map_shell_surface(struct weston_wm_window *window,
 			  struct weston_surface *surface);
 
-static int __attribute__ ((format (printf, 1, 2)))
-wm_log(const char *fmt, ...)
+static bool
+wm_debug_is_enabled(struct weston_wm *wm)
 {
-#ifdef WM_DEBUG
-	int l;
-	va_list argp;
+	return weston_debug_scope_is_enabled(wm->server->wm_debug);
+}
 
-	va_start(argp, fmt);
-	l = weston_vlog(fmt, argp);
-	va_end(argp);
+static void __attribute__ ((format (printf, 2, 3)))
+wm_printf(struct weston_wm *wm, const char *fmt, ...)
+{
+	va_list ap;
+	char timestr[128];
 
-	return l;
-#else
-	return 0;
-#endif
-}
+	if (wm_debug_is_enabled(wm))
+		weston_debug_scope_printf(wm->server->wm_debug, "%s ",
+				weston_debug_scope_timestamp(wm->server->wm_debug,
+				timestr, sizeof timestr));
 
+	va_start(ap, fmt);
+	weston_debug_scope_vprintf(wm->server->wm_debug, fmt, ap);
+	va_end(ap);
+}
 static void
 weston_output_weak_ref_init(struct weston_output_weak_ref *ref)
 {
@@ -717,10 +721,10 @@ weston_wm_handle_configure_request(struct weston_wm *wm, xcb_generic_event_t *ev
 	uint32_t mask, values[16];
 	int x, y, width, height, i = 0;
 
-	wm_log("XCB_CONFIGURE_REQUEST (window %d) %d,%d @ %dx%d\n",
-	       configure_request->window,
-	       configure_request->x, configure_request->y,
-	       configure_request->width, configure_request->height);
+	wm_printf(wm, "XCB_CONFIGURE_REQUEST (window %d) %d,%d @ %dx%d\n",
+		  configure_request->window,
+		  configure_request->x, configure_request->y,
+		  configure_request->width, configure_request->height);
 
 	if (!wm_lookup_window(wm, configure_request->window, &window))
 		return;
@@ -786,11 +790,11 @@ weston_wm_handle_configure_notify(struct weston_wm *wm, xcb_generic_event_t *eve
 		wm->server->compositor->xwayland_interface;
 	struct weston_wm_window *window;
 
-	wm_log("XCB_CONFIGURE_NOTIFY (window %d) %d,%d @ %dx%d%s\n",
-	       configure_notify->window,
-	       configure_notify->x, configure_notify->y,
-	       configure_notify->width, configure_notify->height,
-	       configure_notify->override_redirect ? ", override" : "");
+	wm_printf(wm, "XCB_CONFIGURE_NOTIFY (window %d) %d,%d @ %dx%d%s\n",
+		  configure_notify->window,
+		  configure_notify->x, configure_notify->y,
+		  configure_notify->width, configure_notify->height,
+		  configure_notify->override_redirect ? ", override" : "");
 
 	if (!wm_lookup_window(wm, configure_notify->window, &window))
 		return;
@@ -839,7 +843,7 @@ weston_wm_create_surface(struct wl_listener *listener, void *data)
 	if (wl_resource_get_client(surface->resource) != wm->server->client)
 		return;
 
-	wm_log("XWM: create weston_surface %p\n", surface);
+	wm_printf(wm, "XWM: create weston_surface %p\n", surface);
 
 	wl_list_for_each(window, &wm->unpaired_window_list, link)
 		if (window->surface_id ==
@@ -1096,8 +1100,8 @@ weston_wm_handle_map_request(struct weston_wm *wm, xcb_generic_event_t *event)
 	struct weston_output *output;
 
 	if (our_resource(wm, map_request->window)) {
-		wm_log("XCB_MAP_REQUEST (window %d, ours)\n",
-		       map_request->window);
+		wm_printf(wm, "XCB_MAP_REQUEST (window %d, ours)\n",
+			  map_request->window);
 		return;
 	}
 
@@ -1126,10 +1130,10 @@ weston_wm_handle_map_request(struct weston_wm *wm, xcb_generic_event_t *event)
 		weston_wm_window_create_frame(window); /* sets frame_id */
 	assert(window->frame_id != XCB_WINDOW_NONE);
 
-	wm_log("XCB_MAP_REQUEST (window %d, %p, frame %d, %dx%d @ %d,%d)\n",
-	       window->id, window, window->frame_id,
-	       window->width, window->height,
-	       window->map_request_x, window->map_request_y);
+	wm_printf(wm, "XCB_MAP_REQUEST (window %d, %p, frame %d, %dx%d @ %d,%d)\n",
+		  window->id, window, window->frame_id,
+		  window->width, window->height,
+		  window->map_request_x, window->map_request_y);
 
 	weston_wm_window_set_allow_commits(window, false);
 	weston_wm_window_set_wm_state(window, ICCCM_NORMAL_STATE);
@@ -1157,13 +1161,13 @@ weston_wm_handle_map_notify(struct weston_wm *wm, xcb_generic_event_t *event)
 	xcb_map_notify_event_t *map_notify = (xcb_map_notify_event_t *) event;
 
 	if (our_resource(wm, map_notify->window)) {
-		wm_log("XCB_MAP_NOTIFY (window %d, ours)\n",
-		       map_notify->window);
+		wm_printf(wm, "XCB_MAP_NOTIFY (window %d, ours)\n",
+			  map_notify->window);
 			return;
 	}
 
-	wm_log("XCB_MAP_NOTIFY (window %d%s)\n", map_notify->window,
-	       map_notify->override_redirect ? ", override" : "");
+	wm_printf(wm, "XCB_MAP_NOTIFY (window %d%s)\n", map_notify->window,
+		  map_notify->override_redirect ? ", override" : "");
 }
 
 static void
@@ -1173,10 +1177,10 @@ weston_wm_handle_unmap_notify(struct weston_wm *wm, xcb_generic_event_t *event)
 		(xcb_unmap_notify_event_t *) event;
 	struct weston_wm_window *window;
 
-	wm_log("XCB_UNMAP_NOTIFY (window %d, event %d%s)\n",
-	       unmap_notify->window,
-	       unmap_notify->event,
-	       our_resource(wm, unmap_notify->window) ? ", ours" : "");
+	wm_printf(wm, "XCB_UNMAP_NOTIFY (window %d, event %d%s)\n",
+		  unmap_notify->window,
+		  unmap_notify->event,
+		  our_resource(wm, unmap_notify->window) ? ", ours" : "");
 
 	if (our_resource(wm, unmap_notify->window))
 		return;
@@ -1216,7 +1220,7 @@ weston_wm_window_draw_decoration(struct weston_wm_window *window)
 	cairo_t *cr;
 	int width, height;
 
-	wm_log("XWM: draw decoration, win %d\n", window->id);
+	wm_printf(window->wm, "XWM: draw decoration, win %d\n", window->id);
 
 	weston_wm_window_get_frame_size(window, &width, &height);
 
@@ -1279,8 +1283,8 @@ weston_wm_window_set_pending_state(struct weston_wm_window *window)
 		input_h = height;
 	}
 
-	wm_log("XWM: win %d geometry: %d,%d %dx%d\n",
-	       window->id, input_x, input_y, input_w, input_h);
+	wm_printf(window->wm, "XWM: win %d geometry: %d,%d %dx%d\n",
+		  window->id, input_x, input_y, input_w, input_h);
 
 	pixman_region32_fini(&window->surface->pending.input);
 	pixman_region32_init_rect(&window->surface->pending.input,
@@ -1347,7 +1351,7 @@ weston_wm_window_schedule_repaint(struct weston_wm_window *window)
 	if (window->repaint_source)
 		return;
 
-	wm_log("XWM: schedule repaint, win %d\n", window->id);
+	wm_printf(wm, "XWM: schedule repaint, win %d\n", window->id);
 
 	window->repaint_source =
 		wl_event_loop_add_idle(wm->server->loop,
@@ -1360,18 +1364,24 @@ weston_wm_handle_property_notify(struct weston_wm *wm, xcb_generic_event_t *even
 	xcb_property_notify_event_t *property_notify =
 		(xcb_property_notify_event_t *) event;
 	struct weston_wm_window *window;
-	FILE *fp;
+	FILE *fp = NULL;
 	char *logstr;
 	size_t logsize;
+	char timestr[128];
 
 	if (!wm_lookup_window(wm, property_notify->window, &window))
 		return;
 
 	window->properties_dirty = 1;
 
-	fp = open_memstream(&logstr, &logsize);
+	if (wm_debug_is_enabled(wm))
+		fp = open_memstream(&logstr, &logsize);
+
 	if (fp) {
-		fprintf(fp, "XCB_PROPERTY_NOTIFY: window %d, ", property_notify->window);
+		fprintf(fp, "%s XCB_PROPERTY_NOTIFY: window %d, ",
+			weston_debug_scope_timestamp(wm->server->wm_debug,
+			timestr, sizeof timestr),
+			property_notify->window);
 		if (property_notify->state == XCB_PROPERTY_DELETE)
 			fprintf(fp, "deleted %s\n",
 					get_atom_name(wm->conn, property_notify->atom));
@@ -1380,7 +1390,8 @@ weston_wm_handle_property_notify(struct weston_wm *wm, xcb_generic_event_t *even
 					       property_notify->atom);
 
 		if (fclose(fp) == 0)
-			wm_log("%s", logstr);
+			weston_debug_scope_write(wm->server->wm_debug,
+						 logstr, logsize);
 		free(logstr);
 	} else {
 		/* read_and_dump_property() is a X11 roundtrip.
@@ -1406,7 +1417,7 @@ weston_wm_window_create(struct weston_wm *wm,
 
 	window = zalloc(sizeof *window);
 	if (window == NULL) {
-		wm_log("failed to allocate window\n");
+		wm_printf(wm, "failed to allocate window\n");
 		return;
 	}
 
@@ -1479,12 +1490,12 @@ weston_wm_handle_create_notify(struct weston_wm *wm, xcb_generic_event_t *event)
 	xcb_create_notify_event_t *create_notify =
 		(xcb_create_notify_event_t *) event;
 
-	wm_log("XCB_CREATE_NOTIFY (window %d, at (%d, %d), width %d, height %d%s%s)\n",
-	       create_notify->window,
-	       create_notify->x, create_notify->y,
-	       create_notify->width, create_notify->height,
-	       create_notify->override_redirect ? ", override" : "",
-	       our_resource(wm, create_notify->window) ? ", ours" : "");
+	wm_printf(wm, "XCB_CREATE_NOTIFY (window %d, at (%d, %d), width %d, height %d%s%s)\n",
+		  create_notify->window,
+		  create_notify->x, create_notify->y,
+		  create_notify->width, create_notify->height,
+		  create_notify->override_redirect ? ", override" : "",
+		  our_resource(wm, create_notify->window) ? ", ours" : "");
 
 	if (our_resource(wm, create_notify->window))
 		return;
@@ -1502,10 +1513,10 @@ weston_wm_handle_destroy_notify(struct weston_wm *wm, xcb_generic_event_t *event
 		(xcb_destroy_notify_event_t *) event;
 	struct weston_wm_window *window;
 
-	wm_log("XCB_DESTROY_NOTIFY, win %d, event %d%s\n",
-	       destroy_notify->window,
-	       destroy_notify->event,
-	       our_resource(wm, destroy_notify->window) ? ", ours" : "");
+	wm_printf(wm, "XCB_DESTROY_NOTIFY, win %d, event %d%s\n",
+		  destroy_notify->window,
+		  destroy_notify->event,
+		  our_resource(wm, destroy_notify->window) ? ", ours" : "");
 
 	if (our_resource(wm, destroy_notify->window))
 		return;
@@ -1523,11 +1534,11 @@ weston_wm_handle_reparent_notify(struct weston_wm *wm, xcb_generic_event_t *even
 		(xcb_reparent_notify_event_t *) event;
 	struct weston_wm_window *window;
 
-	wm_log("XCB_REPARENT_NOTIFY (window %d, parent %d, event %d%s)\n",
-	       reparent_notify->window,
-	       reparent_notify->parent,
-	       reparent_notify->event,
-	       reparent_notify->override_redirect ? ", override" : "");
+	wm_printf(wm, "XCB_REPARENT_NOTIFY (window %d, parent %d, event %d%s)\n",
+		  reparent_notify->window,
+		  reparent_notify->parent,
+		  reparent_notify->event,
+		  reparent_notify->override_redirect ? ", override" : "");
 
 	if (reparent_notify->parent == wm->screen->root) {
 		weston_wm_window_create(wm, reparent_notify->window, 10, 10,
@@ -1734,7 +1745,7 @@ surface_destroy(struct wl_listener *listener, void *data)
 		container_of(listener,
 			     struct weston_wm_window, surface_destroy_listener);
 
-	wm_log("surface for xid %d destroyed\n", window->id);
+	wm_printf(window->wm, "surface for xid %d destroyed\n", window->id);
 
 	/* This should have been freed by the shell.
 	 * Don't try to use it later. */
@@ -1750,7 +1761,8 @@ weston_wm_window_handle_surface_id(struct weston_wm_window *window,
 	struct wl_resource *resource;
 
 	if (window->surface_id != 0) {
-		wm_log("already have surface id for window %d\n", window->id);
+		wm_printf(wm, "already have surface id for window %d\n",
+			  window->id);
 		return;
 	}
 
@@ -1782,14 +1794,14 @@ weston_wm_handle_client_message(struct weston_wm *wm,
 		(xcb_client_message_event_t *) event;
 	struct weston_wm_window *window;
 
-	wm_log("XCB_CLIENT_MESSAGE (%s %d %d %d %d %d win %d)\n",
-	       get_atom_name(wm->conn, client_message->type),
-	       client_message->data.data32[0],
-	       client_message->data.data32[1],
-	       client_message->data.data32[2],
-	       client_message->data.data32[3],
-	       client_message->data.data32[4],
-	       client_message->window);
+	wm_printf(wm, "XCB_CLIENT_MESSAGE (%s %d %d %d %d %d win %d)\n",
+		  get_atom_name(wm->conn, client_message->type),
+		  client_message->data.data32[0],
+		  client_message->data.data32[1],
+		  client_message->data.data32[2],
+		  client_message->data.data32[3],
+		  client_message->data.data32[4],
+		  client_message->window);
 
 	/* The window may get created and destroyed before we actually
 	 * handle the message.  If it doesn't exist, bail.
@@ -2007,9 +2019,9 @@ weston_wm_handle_button(struct weston_wm *wm, xcb_generic_event_t *event)
 	uint32_t button_id;
 	uint32_t double_click = 0;
 
-	wm_log("XCB_BUTTON_%s (detail %d)\n",
-	       button->response_type == XCB_BUTTON_PRESS ?
-	       "PRESS" : "RELEASE", button->detail);
+	wm_printf(wm, "XCB_BUTTON_%s (detail %d)\n",
+		  button->response_type == XCB_BUTTON_PRESS ?
+		  "PRESS" : "RELEASE", button->detail);
 
 	if (!wm_lookup_window(wm, button->event, &window) ||
 	    !window->decorate)
@@ -2221,7 +2233,7 @@ weston_wm_handle_event(int fd, uint32_t mask, void *data)
 			weston_wm_handle_destroy_notify(wm, event);
 			break;
 		case XCB_MAPPING_NOTIFY:
-			wm_log("XCB_MAPPING_NOTIFY\n");
+			wm_printf(wm, "XCB_MAPPING_NOTIFY\n");
 			break;
 		case XCB_PROPERTY_NOTIFY:
 			weston_wm_handle_property_notify(wm, event);
@@ -2837,8 +2849,8 @@ xserver_map_shell_surface(struct weston_wm_window *window,
 						   window->surface,
 						   &shell_client);
 
-	wm_log("XWM: map shell surface, win %d, weston_surface %p, xwayland surface %p\n",
-	       window->id, window->surface, window->shsurf);
+	wm_printf(wm, "XWM: map shell surface, win %d, weston_surface %p, xwayland surface %p\n",
+		  window->id, window->surface, window->shsurf);
 
 	if (window->name)
 		xwayland_interface->set_title(window->shsurf, window->name);
diff --git a/xwayland/xwayland.h b/xwayland/xwayland.h
index 52da6786..507d534d 100644
--- a/xwayland/xwayland.h
+++ b/xwayland/xwayland.h
@@ -33,6 +33,7 @@
 #include "compositor.h"
 #include "compositor/weston.h"
 #include "xwayland-api.h"
+#include "weston-debug.h"
 
 #define SEND_EVENT_MASK (0x80)
 #define EVENT_TYPE(event) ((event)->response_type & ~SEND_EVENT_MASK)
@@ -52,6 +53,8 @@ struct weston_xserver {
 	struct wl_listener destroy_listener;
 	weston_xwayland_spawn_xserver_func_t spawn_func;
 	void *user_data;
+
+	struct weston_debug_scope *wm_debug;
 };
 
 struct weston_wm {