Hello, maybe someone has this problem too.
After applying the changes from
/etc/skel/.config/i3/config to my
~/.config/i3/config. And copied the new script
~/.config/i3/scripts/volume_brightness.sh, the brightness buttons on my laptop stopped working.
The solution was:
That the brightness level in the script ~/.config/i3/scripts/volume_brightness.sh were set too low for my laptop Display.
This was set like this:
But my laptop display only reacts from a value of 5 and higher.
If someone also has this problem, it would be worth trying to increase this value.