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Description:

amdfan 0.2.3

AmdFan

Is a fork of amdgpu-fan, with security updates and added functionality.
This is intended for stand-alone GPU's and not integrated APU's.
Why fork?

alternatives abandoned
lacking required features
security fixes not addressed
basic functionality not working

Amdgpu_fan abandoned
As of a couple years ago, and is no longer applying any security fixes to their project or improvements. There were also some bugs that bothered me with the project when I tried to get it up and running.
Features missing
There are a number of features that I wanted, but were not available.

Thresholds allow temperature range before changing fan speed
Frequency setting to allow better control
Monitoring to be able to see real-time fan speeds and temperature

Security Fixes
There are some un-addressed pull requests for some recent YAML vulnerabilities that are still present in the old amdgpu_fan project, that I’ve addressed in this fork.
Basic functionality
Setting the card to system managed using the amdgpu_fan pegs your GPU fan at 100%, instead of allowing the system to manage the fan settings. I fixed that bug as well in this release.
These are all addressed in Amdfan, and as long as I’ve still got some AMD cards I intend to at least maintain this for myself. And anyone’s able to help out since this is open source. I would have liked to just contribute these fixes to the main project, but it’s now inactive.
Documentation
Usage: amdfan [OPTIONS] COMMAND [ARGS]...

Options:
-v, --version Show the version and exit.
--help Show this message and exit.

Commands:
daemon Run the controller as a service
manage Run the fan controller
monitor View the current temperature and speed
print-default Convenient defaults
set Manually override the fan speed

Each subcommand supports --help too, to get more details.
Controlling the fans
There are two ways to control your fans with Amdfan. Note that in order to control the fans, you will likely need to run either approach as root.
The recommended way is through a system service started at boot. This will control the fans based on the detected temperature at a given interval.
In case you don't want to use a service, you may also control the fans manually. While this is only advised to do when first setting up your configuration, keep in mind you can also use it to temporarily take control away from the daemon until you revert the fan speed back to auto.

Monitor
You can use Amdfan to monitor your AMD video cards using the monitor flag. This does not require root privileges, usually.

Configuration
Running amdfan print-default --configuration will dump out the default configuration that would get generated for /etc/amdfan.yml when you first run it as a service. If a value is not specified, it will use a default value if possible.
The following config is probably a reasonable setup:
speed_matrix:
- [4, 4]
- [30, 33]
- [45, 50]
- [60, 66]
- [65, 69]
- [70, 75]
- [75, 89]
- [80, 100]

threshold: 4
frequency: 5

# cards:
# - card0

If a configuration file is not found, a default one will be generated. If you want to make any changes to the default config before running the daemon, run amdfan print-default --configuration | sudo tee /etc/amdfan.yml and do your changes from there.

speed_matrix (required): a list of thresholds [temperature, speed] which are interpolated to calculate the fan speed.
threshold (default 0): allows for some leeway in temperatures, as to not constantly change fan speed
frequency (default 5): how often (in seconds) we wait between updates
cards (required): a list of card names (from /sys/class/drm) which we want to control.

Note! You can send a SIGHUP signal to the daemon to request a reload of the config without restarting the whole service. Additionally, if you're using a pidfile, you can send a signal to reload the config with amdfan daemon --signal=reload
Install
Users: Use your package manager to install the package. It's available on Arch Linux and Gentoo. For other distributions, please request a maintainer to bring the package to your system, or read the installation notes at your own warranty.
Maintainers: Check the installation notes.