In comp.sys.laptops Adam wrote:

Thanks (Guru Paul), but Fn+F3 acts more like a dimmer and
is not permanent. I tried that before looking through the BIOS for
a way to disable keyboard backlight permanently.
For aluminum exterior, keyboard backlight is awful.

Keyboard backlight settings can sometimes be changed when running
Linux from the system settings (I was going to say in the /proc/acpi
directory, but things seem to have moved on).

Here's a forum thread where an ASUS laptop user wants to disable
the keyboard backlight in Ubuntu:
http://askubuntu.com/questions/74585...p-ubuntu-15-10

Here's some detailed information for Arch Linux about changing
keyboard light brightness on another ASUS laptop:
https://wiki.archlinux.org/index.php...oard_backlight

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