Hello. You might think the OS isn't responsible for motherboard's LED but hear me out.

I have an ASUS motherboard (TUF Gaming B550-PLUS) I can turn off the LED when a system is running. But there's no option to turn off when the system is shutdown. (I might be wrong. If you know of otherwise, please let me know!)

I daily-drive Arch Linux. I rarely boot into Windows. Recently I found out motherboard's settings can be manipulated through windows software. And I was able to turn off the LED when the system is down. But it works only when I shutdown in Windows. When I shutdown in linux, it simply keeps the LED on.

Can we do so in Linux as well? I don't seem to be able to find any software from ASUS. I heard there's a software that can control Razer's LED stuff. Does it work for motherboard's LED?

I don't have an option to cut down the power.

Thanks in advance.