Ubuntu – Brightness keyboard buttons do not work on Asus 1225c

asusbrightnessshortcut-keys

I have problem with my new netbook. I installed Ubuntu 12.10 and I can't use my brightness key's (Fn+F5/F6). When i use them OSD appears and indicates the increase or decrease of brightness but nothing really happens to screen. I used this command from terminal(and it worked):

sudo setpci -s 00:02.0 F4.B=xx

But I want use my Fn keys. Is it possible to do this?

Thanks for help!

Best Answer

Copy-Paste from here the commands below (to your terminal) , with order and one at time

First

sudo sed 's/GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"/GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="/' -i /etc/default/grub

Second

sudo update-grub

Reboot your system and see if Fn (for brightness) works.

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