#!/bin/bash source /home/fabian/d/programs/bash_scripts/sane file="/home/fabian/d/programs/bash_scripts/brightness.txt" setting="/sys/class/backlight/nvidia_0/brightness" current=$(cat $setting) # brightness probably =100%, definitely >25% if((current>25)); then # if gamma active, disable, but keep brightness at maximum if(($(cat $file)>100)); then xcalib -c echo -n 100 > $file # otherwise, reduce brightness to 25% (and keep gamma inactive) else sudo su -c "echo -n 25 > $setting" echo -n 25 > $file fi # brightness probably =25%, definitely above minimum elif((current>0)); then # set brightness to minimum sudo su -c "echo -n 0 > $setting" echo -n 0 > $file # brightness=minimum elif((current>-1)); then # turn screen off xset dpms force off sudo su -c "echo -n 0 > $setting" echo -n -1 > $file # if screen already off, do nothing fi