Ubuntu: Brightness Keys(Fn+F5, Fn+F6) Not Working on ASUS K501UX in Ubuntu 16.10



Question:

When I press the function keys + F5, F6 for brightness control nothing happens. This works fine in Windows. I ended up making a shortcut to the Brightness & Lock settings on my Unity bar, but this is far from ideal. How can I fix this?


Solution:1

The fix as mentioned by Pilot6 above is this:

gksudo gedit /etc/default/grub then change the command line to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="

and run sudo update-grub


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