bnema / go-ryzen-power-switch

Automatically toggles cpu-frequency and ryzen_adj power settings between performance and power-saving modes, adapting to whether the device is plugged in or running on battery power.

GoRyzenPowerSwitch

GoRyzenPowerSwitch is a small utility that automatically switches power modes on Ryzen-powered laptops based on the current power source. It uses the ryzenadj and cpupower tools to adjust power and CPU frequency settings.

Overview

The utility runs in a loop, checking every 10 seconds whether the laptop is running on battery or AC power. Depending on the power source, it applies one of the two following configurations:

• Battery mode: Runs ryzenadj --power-saving and cpupower frequency-set -g conservative.
• AC mode: Runs ryzenadj --max-performance and cpupower frequency-set -g performance.

Additionally, it provides two command-line flags --battery and --plugged to force battery or AC mode, respectively, which can be useful for testing purposes.

Requirements

• Go 1.20 or later.
• The ryzenadj and cpupower utilities must be installed and available in your PATH. These tools are used to adjust power and CPU frequency settings.
• This utility uses the /sys/class/power_supply/ACAD/online file to determine whether the laptop is running on AC power. The exact path might vary depending on your distribution and hardware.
• This utility must be run with root privileges because ryzenadj and cpupower require them to adjust power settings. It will prompt for your sudo password when it starts.
• Developed and tested on Arch Linux. Might work on other distributions, but this is not guaranteed.

Service Script

If you want to run GoRyzenPowerSwitch permanently, you can create a systemd service:

sudo nano /etc/systemd/system/goryzenpowerswitch.service
[Unit]
Description=GoRyzenPowerSwitch Service

[Service]
ExecStart=/path/to/goryzenpowerswitch
Restart=on-failure

[Install]
WantedBy=multi-user.target

Then, enable and start the service:

sudo systemctl enable goryzenpowerswitch
sudo systemctl start goryzenpowerswitch

License

This project is licensed under the MIT License - see the LICENSE file for details.