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I am facing the above problem only for Brightness Control. Rest all the Controls with fn key are working. I dont want to create new Shortcuts like CTRL+F5 or CTRL+F6. I want that it should happen with fn key only (as displayed on my keyboard).

Please help me on this....

1 Answer 1

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Try adding acpi_backlight=vendor as a boot option. To do that, open a terminal window, and run

gksu gedit /etc/default/grub

Locate this line: GRUB_CMDLINE_LINUX="".

Edit it to look like this: GRUB_CMDLINE_LINUX="acpi_backlight=vendor"

Save the file, then, in a terminal, run sudo update-grub.

Reboot, and check if the brightness keys work.

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