LG Laptop Extras

modulename: lg-laptop.ko

configname: CONFIG_LG_LAPTOP

Linux Kernel Configuration
└─>Device Drivers
└─>X86 Platform Specific Device Drivers
└─>LG Laptop Extras
In linux kernel since version 4.2 (release Date: 2015-08-30)  
This driver adds support for hotkeys as well as control of keyboard
backlight, battery maximum charge level and various other ACPI
features.

If you have an LG Gram laptop, say Y or M here.

source code:
drivers/platform/x86/lg-laptop.c