I just bought this laptop (Alienware m15 R6) and surprisingly found that it doesn't have keyboard backlight timeout settings? 

There are so many Dell branded laptops which support this feature, including some Alienware series, however I cannot find any related settings on my laptop in either AWCC app or System BIOS settings. It seems that I can only set the keyboard light off manually, or when Windows sleeps. That's strange. Typically, a laptop should have settings that can turn keyboard light off in 10 or 30 seconds. I did BIOS update and Windows Update but both don't help. Please help, thanks!

My keyboard is 4 zone RGB keyboard, not the cherry one. BIOS 1.9.1 =