获取错误Xlib：显示“：24.0”时缺少扩展名“RANDR”。 GTK

我收到这个错误，不知道为什么……请看看我的按钮数组，也许我搞砸了那里，我不确定…我得到的错误是： Xlib: extension "RANDR" missing on display ":24.0". 之后没有任何事情发生，这意味着我的计划根本没有运行….

 #include  /* Our new improved callback. The data passed to this function * is printed to stdout. */ static void callback (GtkWidget *widget, gpointer data) { system ((gchar *) data); } /* another callback */ static gboolean delete_event (GtkWidget *widget, GdkEvent *event, gpointer data) { gtk_main_quit (); return FALSE; } int main (int argc, char *argv[]) { /* GtkWidget is the storage type for widgets */ GtkWidget *window; GtkWidget *box1; /* This is called in all GTK applications. Arguments are parsed * from the command line and are returned to the application. */ gtk_init (&argc, &argv); /* Create a new window */ window = gtk_window_new (GTK_WINDOW_TOPLEVEL); /* This is a new call, which just sets the title of our * new window to "My Assignments" */ gtk_window_set_title (GTK_WINDOW (window), "My Assignments"); /* Here we just set a handler for delete_event that immediately * exits GTK. */ g_signal_connect (window, "delete-event", G_CALLBACK (delete_event), NULL); /* Sets the border width of the window. */ gtk_container_set_border_width (GTK_CONTAINER (window), 50); /* We create a box to pack widgets into. This is described in detail * in the "packing" section. The box is not really visible, it * is just used as a tool to arrange widgets. */ box1 = gtk_vbox_new (FALSE,0); /* Put the box into the main window. */ gtk_container_add (GTK_CONTAINER (window), box1); /*array is here*/ GtkWidget *button[2]; int i; for (i=0; i<2; i++) { button[i]=gtk_button_new(); } button[0] = gtk_button_new_with_label ("Run shellscript"); g_signal_connect (button[0], "clicked", G_CALLBACK (callback), "shellscript"); gtk_box_pack_start (GTK_BOX (box1), button[0], TRUE, TRUE, 0); gtk_widget_show(button[0]); button[1] = gtk_button_new_with_label ("Run program2 "); g_signal_connect (button[1], "clicked", G_CALLBACK (callback), "program"); gtk_box_pack_start (GTK_BOX (box1), button[1], TRUE, TRUE, 0); gtk_widget_show(button[1]); gtk_widget_show (box1); /* Rest in gtk_main and wait for the fun to begin! */ gtk_main (); return 0; }