Perhaps xserver reading xorg.conf adds just enough delay to resolve the race condition. So my bet is that what's in your xorg.conf doesn't actually matter. Try putting a 1 sec sleep into your lightdm config as described in the above bug and remove your xorg.conf, and I bet it'll work then too.
Perhaps xserver reading xorg.conf adds just enough delay to resolve the race condition. So my bet is that what's in your xorg.conf doesn't actually matter. Try putting a 1 sec sleep into your lightdm config as described in the above bug and remove your xorg.conf, and I bet it'll work then too.