Disable_HDMI_Port_on_Pi4:
=========================
You may want to disable the HDMI port on the Pi4 at a hardware level, 
can save a small amount of power and system resources if not being used.
Such as using the pi as a web/nas/download server for exsample.

1. edit the config.txt file by:
sudo nano /boot/firm*/config.txt

2.
Add this line under [all]
hdmi_blanking=1

press CTRL+X to save and exit.

3.
Reboot.

HDMI port should be disabled.


Sources:
https://raspberrypi.stackexchange.com/questions/79728/keep-hdmi-off-on-boot
https://github.com/raspberrypi/documentation/blob/develop/documentation/asciidoc/computers/config_txt/video.adoc

Date: February 22nd, 2022