How to give sudo access to a bash script?

Do you run sudo /home/ronnie/chbr.sh?

With the content of the file being

setpci -s 00:02.0 F4.B=30

Or you allow user ronnie to sudo setpci without password:

ronnie ALL = (ALL) NOPASSWD: /sbin/setpci <-- or whatever path your setpci resides in.

You make all correct, but execute the script with te full path:

$ sudo /home/ronnie/chbr.sh

For anyone who stumbles into this old forum. You don't need sudo to change the brightness. It can be done with the “light” program where the

light -A 5

increases brightness with 5 and

light -U 5

decreases the brightness with 5.