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tools.power-profile: add power profile management tool
Replaces the inline set_tdp script from aergia with a reusable tool
supporting low/normal/high presets and custom wattage with burst limits.
author
lassulus
date
(Feb 7, 2026, 6:03 PM CET)
commit
7e691f85
7e691f8582c29b54c2c44d26730f2f52c1809fea
parent
3f4acf65
3f4acf65a648fa3944b5c9dd4c2e4886bb4a34bc
+94
-6
-6
machines/aergia/physical.nix
-6
machines/aergia/physical.nix
···
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environment.systemPackages = [
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pkgs.vulkan-tools
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(pkgs.writers.writeDashBin "set_tdp" ''
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set -efux
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watt=$1
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value=$(( $watt * 1000 ))
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${pkgs.ryzenadj}/bin/ryzenadj --stapm-limit="$value" --fast-limit="$value" --slow-limit="$value"
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'')
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];
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# corectrl
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tools/power-profile/flake-module.nix
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tools/power-profile/flake-module.nix
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tools/power-profile/power-profile.sh
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tools/power-profile/power-profile.sh
···
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#!/usr/bin/env bash
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set -euo pipefail
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# Power profiles in watts (stapm/sustained limit)
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PROFILE_LOW=3
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PROFILE_NORMAL=15
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PROFILE_HIGH=28
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usage() {
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cat <<EOF
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Usage: power-profile <profile|watts>
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Profiles:
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low - ${PROFILE_LOW}W TDP (battery saving)
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normal - ${PROFILE_NORMAL}W TDP (balanced)
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high - ${PROFILE_HIGH}W TDP (performance)
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Or specify watts directly:
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power-profile 10 # Set 10W TDP
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Burst limits are automatically calculated:
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slow = stapm × 1.2
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fast = stapm × 1.5
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Examples:
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power-profile low
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power-profile normal
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power-profile high
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power-profile 5
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EOF
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}
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set_tdp() {
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local stapm=$1
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# Calculate burst limits (using integer math, *10 then /10 to simulate decimals)
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local slow=$(( (stapm * 12) / 10 ))
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local fast=$(( (stapm * 15) / 10 ))
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local stapm_mw=$((stapm * 1000))
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local slow_mw=$((slow * 1000))
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local fast_mw=$((fast * 1000))
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echo "Setting power profile:"
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echo " STAPM (sustained): ${stapm}W"
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echo " Slow limit: ${slow}W"
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echo " Fast limit: ${fast}W"
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ryzenadj --stapm-limit="$stapm_mw" --slow-limit="$slow_mw" --fast-limit="$fast_mw"
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echo "Done."
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}
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if [[ $# -ne 1 ]]; then
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usage
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exit 1
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fi
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case "$1" in
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low)
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set_tdp "$PROFILE_LOW"
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;;
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normal)
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set_tdp "$PROFILE_NORMAL"
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;;
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high)
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set_tdp "$PROFILE_HIGH"
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;;
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-h|--help|help)
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usage
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exit 0
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;;
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*)
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if [[ "$1" =~ ^[0-9]+$ ]]; then
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set_tdp "$1"
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else
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echo "Error: Unknown profile '$1'"
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usage
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exit 1
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fi
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;;
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esac