Fixed VT switching

backend/drm/backend.c

@@ -54,8 +54,10 @@ static void session_signal(struct wl_listener *listener, void *data) {
 	} else {
 		wlr_log(L_INFO, "DRM fd paused");
 
-		// TODO: Actually pause the renderer or something.
-		// We currently just expect it to fail its next pageflip.
+		for (size_t i = 0; i < drm->outputs->length; ++i) {
+			struct wlr_output_state *output = drm->outputs->items[i];
+			wlr_drm_output_pause_renderer(output);
+		}
 	}
 }
 

backend/drm/drm.c

@@ -116,6 +116,21 @@ static void wlr_drm_output_end(struct wlr_output_state *output) {
 	output->bo[0] = bo;
 }
 
+void wlr_drm_output_pause_renderer(struct wlr_output_state *output) {
+	if (output->state != DRM_OUTPUT_CONNECTED) {
+		return;
+	}
+
+	if (output->bo[1]) {
+		gbm_surface_release_buffer(output->gbm, output->bo[1]);
+		output->bo[1] = NULL;
+	}
+	if (output->bo[0]) {
+		gbm_surface_release_buffer(output->gbm, output->bo[0]);
+		output->bo[0] = NULL;
+	}
+}
+
 void wlr_drm_output_start_renderer(struct wlr_output_state *output) {
 	if (output->state != DRM_OUTPUT_CONNECTED) {
 		return;
@@ -608,7 +623,7 @@ static void page_flip_handler(int fd, unsigned seq,
 	}
 
 	output->pageflip_pending = false;
-	if (output->state == DRM_OUTPUT_CONNECTED) {
+	if (output->state == DRM_OUTPUT_CONNECTED && state->session->active) {
 		wlr_drm_output_begin(output);
 		wl_signal_emit(&output->wlr_output->events.frame, output->wlr_output);
 		wlr_drm_output_end(output);

backend/libinput/backend.c

@@ -86,6 +86,21 @@ static struct wlr_backend_impl backend_impl = {
 	.destroy = wlr_libinput_backend_destroy
 };
 
+static void session_signal(struct wl_listener *listener, void *data) {
+	struct wlr_backend_state *backend = wl_container_of(listener, backend, session_signal);
+	struct wlr_session *session = data;
+
+	if (!backend->libinput) {
+		return;
+	}
+
+	if (session->active) {
+		libinput_resume(backend->libinput);
+	} else {
+		libinput_suspend(backend->libinput);
+	}
+}
+
 struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
 		struct wlr_session *session, struct wlr_udev *udev) {
 	assert(display && session && udev);
@@ -112,6 +127,9 @@ struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
 	state->udev = udev;
 	state->display = display;
 
+	state->session_signal.notify = session_signal;
+	wl_signal_add(&session->session_signal, &state->session_signal);
+
 	return backend;
 error_state:
 	free(state);

example/simple.c

@@ -42,7 +42,7 @@ static void handle_keyboard_key(struct keyboard_state *kbstate,
 		xkb_keysym_t sym, enum wlr_key_state key_state) {
 	if (sym == XKB_KEY_Escape) {
 		kbstate->compositor->exit = true;
-	} else if (sym >= XKB_KEY_F1 && sym <= XKB_KEY_F12) {
+	} else if (key_state == WLR_KEY_PRESSED && sym >= XKB_KEY_F1 && sym <= XKB_KEY_F12) {
 		wlr_session_change_vt(kbstate->compositor->session, sym - XKB_KEY_F1 + 1);
 	}
 }

include/backend/drm.h

@@ -89,5 +89,6 @@ void wlr_drm_scan_connectors(struct wlr_backend_state *state);
 int wlr_drm_event(int fd, uint32_t mask, void *data);
 
 void wlr_drm_output_start_renderer(struct wlr_output_state *output);
+void wlr_drm_output_pause_renderer(struct wlr_output_state *output);
 
 #endif

include/backend/libinput.h

@@ -16,6 +16,8 @@ struct wlr_backend_state {
 	struct libinput *libinput;
 	struct wl_event_source *input_event;
 
+	struct wl_listener session_signal;
+
 	list_t *devices;
 };