I've just encountered the same issue with undefined macro and then noticed that the startx man page contains some text, added in http://sources.debian.net/src/xinit/1.3.2-1/debian/patches/03_debian_startx_manpage.diff that is not displayed by man:
startx -- -dpi 100 startx -- -layout Multihead To determine the client to run, startx first looks for a file called .xinitrc in the user's home directory. If that is not found, it uses The paragraph starting with "Note that in the Debian system, what many people traditionally..." is not added before the "To determine the client..." Regards, robert -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org