--- src/backends/x11/meta-renderer-x11.c	2017-05-11 06:30:09.000000000 -0600
+++ src/backends/x11/meta-renderer-x11.c	2017-06-05 12:14:08.090473267 -0600
@@ -79,14 +79,6 @@
   cogl_renderer_set_custom_winsys (cogl_renderer, get_x11_cogl_winsys_vtable);
   cogl_xlib_renderer_set_foreign_display (cogl_renderer, xdisplay);
 
-  /* Set up things so that if the INTEL_swap_event extension is not present,
-   * but the driver is known to have good thread support, we use an extra
-   * thread and call glXWaitVideoSync() in the thread. This allows idles
-   * to work properly, even when Mutter is constantly redrawing new frames;
-   * otherwise, without INTEL_swap_event, we'll just block in glXSwapBuffers().
-   */
-  cogl_xlib_renderer_set_threaded_swap_wait_enabled (cogl_renderer, TRUE);
-
   return cogl_renderer;
 }