Xorg without a conf file does what it can to attempt a startup. If it doens't work, is tought luck. You are supposed to have a valid config file.
The spec is related to something different. ** Changed in: xorg (Ubuntu) Status: Unconfirmed => Rejected -- Xorg provides unfunctioning fail-safe settings https://launchpad.net/bugs/50718 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs