How to change the Monitor brightness on Linux?

Question

How do I programmatically change the monitor brightness on Linux?

I\'m using SLES 11.

Answer 1

If you have multiple displays and php installed, put this in

/usr/bin/brightness

#!/usr/bin/php
1) die("enter brightness lvl 0.1 - 1");
preg_match_all('!^(\S+)!m',`xrandr --current | grep ' connected'`,$m);
foreach($m[1] as $display){
        echo `xrandr --output $display --brightness $br`."\n";
}

than call brightness .7