Brightness Keys

[penglezos]

For screen brightness control, the Fn-key combinations can be:
Fn+F5 - decrease brightness
Fn+F6 - increase brightness

You should see a 'brightness icon' stuck on the relevant keys on your keyboard for the control of screen brightness.

To get the Fn-keys to work, you will need to edit a line in the /etc/default/grub file. To do this open your terminal and type...

Code:

gksudo leafpad /etc/default/grub

The grub file will then open on your screen. Then look for this line in the file:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Then add acpi_osi= to this line as follows:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="

Then save the grub file:

Code:

sudo update-grub

On reboot, the Fn+F5 and Fn+F6 brightness keys should function ...


The link bitsnpcs gave you in post #3, describes using the terminal to fix the level of brightness. While I'm sure this will work, it is more practical and immediate to use the Fn-keys as you can continuously vary the brightness to whatever level you wish, at a the touch of your keyboard.

Keyboards on modern gaming computers can have a backlight, which can also be controlled by Fn-key combinations. If yours is one of these, let me know and I'll try and help.

Dear m654321, thanks for your reply!! I applied the lines to the grub file and after the reboot it didn't work!!