Odroid C4 -> disable Wifi, HDMI, Bluetooth drivers permanently

[MarkLuun]

Dear Armbians

 

I have an Odroid C4 in use in a DC with 100 MBits synchronous network connection. As I use it as dedicated networking device, bound to the internet  over ethernet connection, I would like to disable the drivers for Wifi, HDMI and Bluetooth permanently. They are not necessary in my case.

What would be the safest way to do this?

[tparys]

1. Identify which drivers you want to block

 

# For PCI devices
$ lspci -k

# For USB devices
$ usb-devices

 

2. Verify you can actually block them

 

$ lsmod | grep <module name>

 

3. Add them to /etc/modules.d as blacklisted. See "man modprobe.d", and scroll down to "blacklist" or see /etc/modprobe.d for examples

 

4. You'll probably want to update your initramfs and reboot.

 

$ sudo update-initramfs -u -k $(uname -r)

 

5. If your board uses uInitrd, you may need to re-run mkimage on it. (Don't have a C4 here in front of me)

 

Also note that if for some reason the module is built-in, you'll need to rebuild without that driver, or as a module that can be blacklisted.