intel_rng: FWH not detected. Today I fixed it!
The item shows up in /var/log/dmesg as
Feb 27 06:28:03 my_computer kernel: [ 15.128000] intel_rng: FWH not detected
It turns out to have a simple explanation, and suggested solution is to 'turn off' the kernel module.
sudo gedit /etc/modprobe.d/blacklistto edit the blacklist file as root. I added the following at the bottom of the file:
# prevents minor boot error 'intel_rng: FWH not detected' blacklist intel_rngReboot, and success! The error message is gone.