How do I adjust the screen brightness in Xfce?

[raginkestrel]

Hi Toz,

I never have "Num Lk" on, as there isn't a separate keypad. Sony basically put a pseudo keypad in the middle of the keyboard which is a pain to use.

There is no response on "acpi_listen" when I press the "Fn" key with or without the "Num Lk" on.

I am not worried about the "Fn" key not working. The only two keys I ever use are the backlight controls and that has been fixed with the keyboard shortcuts.

[Toz]

Ok. I was just curious because I just remembered that on my other notebook, a toshiba, the Fn keys only work if the Numlock is off.

[velko]

here is a tiny script that I save as "xb" somewhere in my PATH and use like:

xb 10

The arg is from 0 to 100.

#!/bin/bash


#xbacklight -set $1

file="/sys/class/backlight/intel_backlight/brightness"

b="4648"

min="0"
max="4648"

steps="100"

step="$1"

if [[ -z $step ]]
then step=50
fi


b=`calc "int($min + ($max-$min)*$step/$steps + 0.5)"`

#echo $b; exit

echo $b | sudo tee $file >/dev/null

----


it relies on the system's brightness file residing in

/sys/class/backlight/intel_backlight/brightness


to find out - go to /sys/class/backlight and see whats in there...


try seeing if you can find a brightness file in there and see what are the min/max vals in there when you use the fn keys...

Also note : I use the

GRUB_CMDLINE_LINUX_DEFAULT="quiet nosplash acpi_backlight=vendor"

line in my

/etc/default/grub file

you put this acpi_backlight=vendor in there and then sudo update-grub

and reboot...