Here is the contents of `/etc/default/linux-modules-nvidia`
# If you change this file run one of the commands below to pull existing
# installed packages into compliance:
#
# sudo dpkg-reconfigure linux-modules-nvidia-5.4.0-26-generic
# sudo dpkg-reconfigure
Here is the contents of `/etc/default/ linux-modules- nvidia`
# If you change this file run one of the commands below to pull existing nvidia- 5.4.0-26- generic
# installed packages into compliance:
#
# sudo dpkg-reconfigure linux-modules-
# sudo dpkg-reconfigure
latelink=true
Running...
sudo dpkg-reconfigure linux-modules- nvidia- 440-$(uname -r)
...installs the signed nvidia kernel modules and following a reboot prime is working.