Building/loading dahdi from asterisk

[Bruno Wolff III]

On Sat, Jul 18, 2015 at 19:21:37 -0400,
  Alex <mysqlstudent at gmail.com> wrote:
>
>I'm really stuck with getting asterisk started. I've built and install
>the dahdi asterisk modules, but they don't load automatically on boot.
>
>The asterisk-dahdi package includes /etc/rc.d/init.d/dahdi which runs
>"/bin/systemctl start dahdi.service" but it fails to load the modules.

I have been seeing this for a while, but haven't figured out what change 
caused it.