The Rasberry PI has Almalinux 9 installed as OS, monitor is a 5" 1024x600

https://wiki.almalinux.org/documentation/raspberry-pi.html

dnf install xorg-x11-server-Xorg xorg-x11-xauth xorg-x11-utils

Data en cache dir in /dev/shm/chromium, to reduce wear and tear of the sd disk.

 

/root/.xinitrc:

#!/bin/sh 
xset -dpms 
xset s off 
xset s noblank 
mkdir /dev/shm/chromium 
chromium-browser http://<URL> --user-data-dir=/dev/shm/chromium --window-size=1024,600 --start-full screen --kiosk --no-sandbox --noerrdialogs --disable-translate --no-first-run --fast --fast-start --disable-infobars --disable-features=TranslateUI --disk-cache-dir=/dev/shm/chromium  --password-store=basic
 

chmod 755 /root/.xinitrc

 

Start:

xinit /root/.xinitrc