AMDGPU Driver To Allow Radeon GPU Fan Speed Controls Via Sysfs
Written by Michael Larabel in Radeon on 30 September 2018 at 07:24 AM EDT. 21 Comments
RADEON --
A set of five patches were sent out on Sunday by AMD's Rex Zhu that enable RPM fan settings to be viewed and manually toggled via the sysfs interface.

For those wishing to manually override your Radeon graphics card fan control settings, the AMDGPU DRM driver will be offering this ability via sysfs. The new patches allow for the fan speed target to be viewed/set, the ability to read the min/max fan speed, and to enable/disable the fan sensor all via sysfs, making it easy to read or tune these values from the command-line or easy-to-create scripts.


It has surprisingly taken a while for this feature that's been sought after by some users, but at least it's here now and useful particularly if using the Linux command-line based AMD OverDrive functionality during overclocking or if trying to get your graphics card to forcefully operate quieter. This is on a fan RPM basis while previously some AMD graphics cards could be controlled on a PWM (Pulse Width Modulation) toggle.

The five patches were sent out today on amd-gfx. Sadly it's likely too late for getting these fan control patches into the Linux 4.20~5.0 kernel, but should come into the follow-on kernel release in early 2019.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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