XSelectInput(compositor->display, screen->root, SubstructureNotifyMask);
screen->overlay = XCompositeGetOverlayWindow(compositor->display, screen->root);
XGetGeometry(compositor->display, screen->overlay, &dummy_root, &x, &y, &screen->width, &screen->height, &border, &depth);
XSelectInput(compositor->display, screen->root, SubstructureNotifyMask);
screen->overlay = XCompositeGetOverlayWindow(compositor->display, screen->root);
XGetGeometry(compositor->display, screen->overlay, &dummy_root, &x, &y, &screen->width, &screen->height, &border, &depth);