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I recently installed Ubuntu 12.04 (beta 2) on my HP mini 110-4117, but I cant control screen brightness. The Fn + F2 , Fn + F3 keys don't work. System Settings > Brightness and Lock doesn't provide any means of controlling screen brightness.

How can this be fixed? Thank you.

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1 Answer 1

Here is what worked for me. I got the solution from the folowing links. Check them out or read the summary below.

http://linuxon1001p.blogspot.com/2010/03/fixing-brightness-controls.html

Desktop doesn't remember brightness settings after a reboot

Summary:

  1. Edit your /etc/default/grub file:

    sudo gedit /etc/default/grub

  2. Add the options "acpi_osi=Linux acpi_backlight=vendor" to the GRUB_CMDLINE_LINUX_DEFAULT line. It should look like this:

    *GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"*

    original line was:

    *GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"*

  3. Update grub configuration!!!! - do not forget to do this, the configuration change will not be set up if you don't run the next command:

    sudo update-grub

This worked for me after trying a lot of other solutions. I have a HP dv7-6090ef with hybrid graphics Intel/AMD.

Have fun using Ubuntu!

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Thanks! This solved the problem on my hp g7-1310us after 6 months with screen brightness at full blast. –  klenwell Jun 24 '12 at 4:33

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