assert(scr->twin_ctx.x11->screen);
scr->tscreen = scr->twin_ctx.x11->screen;
waiter_fd = ConnectionNumber(scr->twin_ctx.x11->dpy);
#endif
} else if (backend == pbt_twin_fbdev) {
assert(scr->twin_ctx.x11->screen);
scr->tscreen = scr->twin_ctx.x11->screen;
waiter_fd = ConnectionNumber(scr->twin_ctx.x11->dpy);
#endif
} else if (backend == pbt_twin_fbdev) {