Auto Update for power-profiles-daemon

auto_profile

#!/bin/bash

dbus-monitor --system "type='signal',path='/org/freedesktop/UPower/devices/battery_BAT0',member='PropertiesChanged'" | while read LINE; do
    echo ${LINE} | grep battery_BAT0 | grep -q PropertiesChanged
    if [ $? -eq 0 ]; then
        BATT_STAT=$(dbus-send --print-reply=literal --system --dest=org.freedesktop.UPower /org/freedesktop/UPower/devices/battery_BAT0 org.freedesktop.DBus.Properties.Get  string:org.freedesktop.UPower.Device string:State | awk '{ print $3; }')
        if [ $BATT_STAT -eq 1 ] || [ $BATT_STAT -eq 4 ]; then
            LEVEL=$(tuned-adm list | grep -q throughput-performance && echo "throughput-performance" || echo "balanced")
        elif [ $BATT_STAT -eq 5 ]; then
            LEVEL="balanced"
        else
            LEVEL="powersave"
        fi
	if [[ "$(tuned-adm active | sed 's,.*: ,,')" != "$LEVEL" ]] ; then
		echo "Changing power level to ${LEVEL}"
		tuned-adm profile $LEVEL
		[[ $? -ne 0 ]] && echo "Could not change power level to ${LEVEL}!"
        fi
    fi
done

Thanks for that. I should note that this script is probably no longer useful For Fedora users as of Fedora 41 since Fedora has since moved to upower by default.

I just updated this to work for Fedora 41 via tuned. Use the previous version if you're on Fedora 40 or otherwise using the powerprofiles daemon. I also updated the name to match the systemd service example. It'll also spam the logs less since it won't output anything if the level isn't changing now.

Note that tuned also has a "recommended" and "auto_profile" mode already, so you might consider just using the existing tuned methods. If you specifically want these modes based on the battery/charging status, then this script should still be useful.