powersave

#!/bin/bash

# Description: This script is used to expand battery life by applying some powersaving tweaks.
# Dependency: cpupower, wireless-tools

# set cpu governor to powersave
sudo cpupower frequency-set -g powersave > /dev/null

# disable bluetooth
sudo systemctl stop bluetooth.service

# enable Wi-Fi power management
sudo iwconfig wlo1 power on

# enable SATA power management
sudo hdparm -B 1 /dev/sda 

# enable USB autosuspend
for usb_device in /sys/bus/usb/devices/*/power/control; do
    echo 'auto' | sudo tee "$usb_device" > /dev/null
done

# enable PCIe ASPM to auto
for pcie_device in /sys/bus/pci/devices/*/power/control; do
    echo 'auto' | sudo tee "$pcie_device" > /dev/null
done

# disable NMI watchdog
echo '0' | sudo tee /proc/sys/kernel/nmi_watchdog > /dev/null

# disable Wake-on-Timer
echo '0' | sudo tee /sys/class/rtc/rtc0/wakealarm > /dev/null

# enable runtime PM for selected devices
for device in /sys/bus/usb/devices/*/power/control; do
    echo 'auto' | sudo tee "$device" > /dev/null
done