Comment 126 for bug 765438

Hello!
Got semi-erratic troubles with the backlight too:

Laptop Asus N76VZ

Ubuntu 12.10

Starts with a medium- low luminosity so i made shortcut to (french language system): "parametres systeme , then : lumisosité et verrouillage" witch could be translated as something like "system configuration , light and locking".

then suddently light changes to maximum, without any action on cursor.

The standard control doesnt work well as when it goes to screen saving, it comes out with a very low light,
thats why i look for work around.

Been trying to restore keyboard keys for setting the backlight by installing xbacklight:

sudo apt-get install xbacklight

Did also at startup xbacklight =75

And then affected the lumisosity keys to, respectivly,

xbacklight +5
xbacklight -5

This thing as been working , but is erratic , sometimes woks fine ,
sometimes my keys acting as a bistable switch , variing light with only two values.

I'd like to use my keys shortcuts to adress this in a more direct way, like sending the right parameters to
the standard program and uninstalling xbacklight.

There is a problem somewhere.
I fell like it could be related to broken communication between some programs , the variable related to light.

Thanks for the care you take on Linux Systems !