Comment 0 for bug 1665530

I have a gigabyte P57 laptop running Ubuntu 16.04 kernel 4.8.x. My brightness control keys (fn+F3, fn+F4) are not getting detected. After reading about how keypresses are handled by the Linux kernel, I used showkey to check the scancodes of these keys. I did not get any output. Similarly no output from xev, evtest and acpi_listen.

Just for your reference, other keys like volume up (fn+F9) are working alright.