Ubuntu

Screen Brightness

Asked by Rahul

hello,i am Rahul,i have Ubuntu 12.04 LTS in my laptop(ASPIRE-5750,i3,32bit).i am unable to reduce the BRIGHTNESS of my laptop screen(i try fn+<| key for reduce the brightness same like as window it's working ).before some days i used Ultimate,opensuse they all are work properly in my system,but i don't know why UBUNTU create some problem for this function,please help me

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N1ck 7h0m4d4k15 (nicktux) said : 		#1

Open a terminal (CTRL+ALT+T) and apply the following command. BE AWARE that is ONE command starts with sudo and ends in grub. Copy-paste it as ONE command in terminal.

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

Then run in same terminal

    sudo update-grub

Reboot your PC and see if Fn keys work now.

Regards
 NikTh

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actionparsnip (andrew-woodhead666) said : 		#2

Also make sure you have the latest BIOS. It can help.

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