Ubuntu 12.04 fix Fn Brightness keys

11 May

So HP Pavilion g6 laptop encountered the oh-the-Brightness-Function-keys-are-not-working-yet-again issue after the installation of Ubuntu 12.04. There is a simple fix. So here we go …..

#1 (open the file in gedit or vi)

$ sudo vi /etc/default/grub
[sudo] password for sudharsan:

#2 (find an insert the arguments in gray)

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_backlight=vendor“

#3 (update the grub configuration)

$ sudo update-grub
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.5.0-23-generic
Found initrd image: /boot/initrd.img-3.5.0-23-generic
Found memtest86+ image: /boot/memtest86+.bin
Found Windows 8 (loader) on /dev/sda1

Just reboot the machine.


At times the screen would go entirely dark. Or would not apparently resume from a blank screen.

For such cases, all you need to do is press “Fn + Brightness UP button” and screen will GLOW. Simple!!

Works for Ubuntu 12.10 perfectly

You can use “sudo gedit /etc/default/grub” if you are not very familiar with vi editor!

1 Comment

Posted by on May 11, 2013 in Ubuntu



One response to “Ubuntu 12.04 fix Fn Brightness keys

  1. Kumar

    May 12, 2013 at 4:31 PM

    Awesome solution thanks for the blog…



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