Fix your laptops brightness function keys operating properly in Hardy

Sponsored Link
If you recently installed Ubuntu Hardy Heron 8.04 and discovered that your laptops function keys are not properly adjusting the brightness. In essence, you are pressing the key combination and nothing is happening try this fix.

Before doing any changes you need to take backup of existing files

Now you need to download the following files in /etc/acpi/ directory

Download from here

Download from here

After replacing these scripts

No reboot or logout required, simply press your function combination on your laptop to change brightness. Try to press FN + Up/Down Arrow.

Credit goes to AaronMT

You may also like...

37 Responses

  1. john says:

    i am using sony vaio vpccw13eg.I installed linux mint 9 but i am unable to adjust screen brightness. i tried above written tips. Its not working.So please suggest me something.

  2. Zittergie says:


    I am using Linux Mint too (version 11) and the same problem here. To resolve the problem try the following.

    You will need to add this to your xorg.conf:

    Section “Device”
    Identifier “Default Device”
    #Next line is essential to have a working brightness function
    Option “RegistryDwords” “EnableBrightnessControl=1”
    Driver “nvidia”

  3. Bhupendra Singh Purawat says:


    It is gr8 and very easy solution. It works fine for me for my laptop HP Compaq nx6110 (Ubuntu 11.04).

    Login with root user and copy both the files at /etc/acpi/ folder.. thats all.

    Thanks a lot.

  4. john says:

    install compizconfig setting manager,
    from compizconfig–opacity and brightness–brightness tab you can enable your brightness function. its working for me.
    you need to give shortcut you want to use.

  5. aa says:

    Thanks John… it works 4 me in my Dell laptop with Intel graphics card. My multimedia keys are also not working (was working with banshee not with audacious). Got any solution? I tried keyboard shortcuts…. but in vain :(. Thanks in advance

  6. BABAN says:

    I format my sony vaio vpcea43eg model pre loded windows 7 home basic 64 bit version and load windows7 ultimate 32bit after that it’s key board function key is not worked plz give the solution …………..

  7. Elisabeth says:

    John, you made my day. Cannot believe that ccsm was the solution. so simple!

Leave a Reply

Your email address will not be published. Required fields are marked *