kernel modules specified in /etc/modules do not load on reboot

[Phil Stephens]

ubuntu@ip-xxxx:~$ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.

softdog
ubuntu@ip-xxxxx:~$ lsmod | grep softdog
ubuntu@ip-xxxxx:~$ uname -r
4.15.0-1063-aws
ubuntu@ip-xxxxx:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"

This file clearly indicates how to add modules to load at boot. However it doesn't work.

[Phil Stephens (phil-stphns)]

I'm pretty sure I logged this to the wrong project, and I'm not sure where it should go. Any help would be appreciated, thanks!