# Dasharo ACPI fan control driver proposed for Linux kernel

> **Key takeaway:** 3mdeb posted dasharo-acpi, a new Linux kernel driver enabling fan PWM monitoring and future curve configuration for systems running Dasharo open-source firmware.

**Published:** 2026-11-13T10:51:34+00:00 
**Source:** Phoronix Benchmarks & Drivers 
**Category:** kernel-os 
**Canonical URL:** https://fosswire.org/news/dasharo-acpi-fan-control-driver-proposed-for-linux-kernel.html 

## Summary
The 3mdeb consulting firm has submitted dasharo-acpi for upstream Linux kernel review, a driver designed to expose fan control capabilities on hardware running Dasharo, the company's Coreboot-based open-source firmware distribution. The initial implementation supports fan monitoring only, with write and PWM control functionality planned for subsequent revisions. The driver was validated on a NovaCustom V560TU laptop using pre-release Dasharo firmware that implements the underlying ACPI fan control methods.

Dasharo firmware already runs on select AMD Ryzen AM5 consumer boards and Gigabyte EPYC server platforms, making this driver relevant to both workstation and server deployments where open-source firmware is preferred. The ACPI-based approach follows standard kernel thermal subsystem conventions rather than introducing proprietary interfaces.

## Driver architecture and current limitations
- **ACPI interface:** The driver communicates with Dasharo firmware through standard ACPI methods rather than direct hardware register access, improving portability across supported mainboards.
- **Read-only initial scope:** The first patch series implements fan monitoring only; PWM write operations and configurable fan curve programming remain future work.
- **Validation hardware:** Testing was performed on the NovaCustom V560TU laptop, indicating the driver targets both mobile and desktop/server form factors where Dasharo is deployed.
- **Firmware dependency:** Functional fan control requires corresponding Dasharo firmware support; the tested build was not yet publicly released at time of posting.
- **Upstream status:** The driver is currently under review on the Linux kernel mailing list and has not been merged into any kernel release.

## Why it matters
This driver advances the viability of open-source firmware on everyday hardware by closing a long-standing gap where proprietary vendor utilities handled thermal management. For Linux distributions and system administrators deploying Dasharo on AMD Ryzen workstations or EPYC servers, upstream kernel integration eliminates the need for out-of-tree modules or firmware-specific user-space daemons to monitor system thermals.