[Trisquel-users] Change "brightness" file permission permanently

[andresolnik]

Hi, the only way I can change the brightness on my HP 23 All In One is  
modifying the file /sys/class/backlight/intel_backlight. It works great, but  
the thing is that I want to change it without being root or using sudo. I've  
successfully changed its permission and wrote a script so every user could  
change the brightness using a keyboard shortcut. It works perfectly fine  
until I reboot the system....then the permissions get back to normal. Is  
there a way to change the permission of this file permanently or can anyone  
suggest another workaround. I've already tried xbacklight and setpci (sudo  
setpci -s "00:02.0" F4.B=XX) without success.  Thanks in advance!