Article ID: 000026641 Content Type: Troubleshooting Last Reviewed: 07/12/2021

Programming the Ring LED on Intel NUC in Linux Operating Systems

Environment

Operating System

linux

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Summary

NUC6CAYH unable to boot, ring led status stuck in fade mode. BIOS defaults does not solve.

Description

How to program the ring LED on Intel NUCs when using Linux.

Resolution

Resources to help you program the ring LED on Intel NUCs for Linux:

Using WMI to Program the Ring and Button LEDs details two software layers:

A lower layer, which exposes the LED programming (method) interface in ACPI.
An upper layer, which exposes the WMI interface for invoking ACPI methods.

While the second (WMI) layer is specific to Windows, the first layer (ACPI) is OS-independent. There are implementations that support the invocation of ACPI methods in Linux. Here's a place to start: GitHub - mkottman/acpi_call. - a Linux kernel module that enables calls to ACPI methods through /proc/acpi/call.

The NUC Blog also has information for this: Linux Kernel Driver for NUC LED Control.

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