Could it be that this is cause by conflict between System V and upstart?
Both of these files are installed by the freeradius deb:
/etc/init.d/freeradius
/etc/init/freeradius.conf
When I experienced this issue while installing freeradius-ldap, it
seemed that the post-install script of freeradius-l
** Attachment added: "oem-config-package-console.png"
https://bugs.launchpad.net/bugs/1039390/+attachment/3269998/+files/oem-config-package-console.png
** Attachment removed: "oem-config-package-console.png"
https://bugs.launchpad.net/launchpad/+bug/1039390/+attachment/3269998/+files/oem-c