The option has been removed from the X server:
http://cgit.freedesktop.org/xorg/xserver/commit/?id=5e43cd28692bc05cac80f38b47104a26c0524385
The option has been removed from the X server:
http:// cgit.freedeskto p.org/xorg/ xserver/ commit/ ?id=5e43cd28692 bc05cac80f38b47 104a26c0524385