Do not set hw cursor if disabled when switching VT

backend/drm/backend.c

@@ -76,7 +76,7 @@ static void session_signal(struct wl_listener *listener, void *data) {
 
 			struct wlr_drm_plane *plane = conn->crtc->cursor;
 			drm->iface->crtc_set_cursor(drm, conn->crtc,
-				plane ? plane->cursor_bo : NULL);
+				(plane && plane->cursor_enabled) ? plane->cursor_bo : NULL);
 		}
 	} else {
 		wlr_log(L_INFO, "DRM fd paused");

backend/drm/drm.c

@@ -505,8 +505,10 @@ static bool wlr_drm_connector_set_cursor(struct wlr_output *output,
 
 	if (!buf && update_pixels) {
 		// Hide the cursor
+		plane->cursor_enabled = false;
 		return drm->iface->crtc_set_cursor(drm, crtc, NULL);
 	}
+	plane->cursor_enabled = true;
 
 	// We don't have a real cursor plane, so we make a fake one
 	if (!plane) {

include/backend/drm/drm.h

@@ -33,6 +33,7 @@ struct wlr_drm_plane {
 	float matrix[16];
 	struct wlr_texture *wlr_tex;
 	struct gbm_bo *cursor_bo;
+	bool cursor_enabled;
 
 	union wlr_drm_plane_props props;
 };