mdevd-conf setup

Install mdevd-conf.
symlink or copy mdev.conf from the directory of installation (usually /usr/local/lib/mdevd-conf/etc/mdev.conf or /package/admin/mdevd-conf/etc/mdev.conf) to /etc/mdev.conf.
Start mdevd, preferable through a service managere like goetia.
Run mdevd-coldplug to have mdevd apply /etc/mdev.conf to /dev.