How to disable the undervoltage and audit message completely

[3HHN]

it's really annoying to see those error logs shows up especially when I'm working on TTY, they will ruin the output, is there any way to disable those error messages completely?

[ufo6000]

for audit see here in the "Installation" section:
https://wiki.archlinux.org/title/Audit_framework

edit:
regarding power I found this hint on google:
"Get a better power supply and cables."

[3HHN]

Where should I apply this $this->bbcode_second_pass_code('', 'audit=0') to?
I've tried to add it into /boot/config.txt but it doesn't work.

[unformatted]

The link ufo6000 supplied gives you the answer. You must add it as a kernel parameter. For raspberry pi that would be /boot/cmdline.txt.

As for the undervoltage detection, if you run a pi on a regular 5V supply and don't connect anything power hungry on the USB ports you should be fine. As soon as you connect for example a USB external harddrive you might get voltage drops giving this message. Either power your USB peripherals externally or better: use a 5.1V power supply wich can supply at least 2.5A, the bigger the better. And don't go for the cheap ones. Look for raspberry pi powersupply on official dealer websites.

I run a RPi4 with 2TB USB harddrive as a NAS with a 5.1V/2.5A supply and never get these messages.

[3HHN]

I've added $this->bbcode_second_pass_code('', 'audit=0') to /boot/cmdline.txt it doesn't work as well.

[unformatted]

Please post cmdline.txt

[3HHN]

The file was empty.

[ufo6000]

which Pi do you own ? and which image did you use for installation exactly ?
I'm asking, because there exists 2 different boot loaders...

My link has also a 2nd solution for audit. But it seems you won't like my links at all

[3HHN]

The pi on my hand is pi4 4G with arch aarch64

[ufo6000]

on aarch64 you have the uboot loader:

go into /boot
edit the line "setenv bootargs ..." in /boot/boot.txt and append your kernel parameter.
and run ./mkscr

If you are unsure, I suggest to read my link (the 3rd time ) and have a look at the other way, which I assume is easier and less dangerous.