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--- notes:laptop_power_management [2019/04/20 05:52] – Sean Rhone
+++ notes:laptop_power_management [2024/08/13 18:45] (current) – removed Sean Rhone
@@ Line 1: / Line 1: @@
-====== Laptop Power Management ======
-===== Notes =====
-  * This expects a laptop with a battery
-  * Do not use this for desktops
-===== Testing =====
-  * The following commands can be ran to see if they work on specific hardware
-  watch -n 0.1 grep \'cpu MHz\' '/proc/cpuinfo'
-  sudo x86_energy_perf_policy --all 'performance' --turbo-enable '1' --force
-  sudo x86_energy_perf_policy --all 'power' --turbo-enable '0' --force
-====== Dependencies ======
-===== Fedora Workstation =====
-  * ''kernel-tools'' provides ''x86_energy_perf_policy''
-  sudo dnf install 'kernel-tools'
-===== Ubuntu =====
-  * ''linux-tools-common'' provides ''x86_energy_perf_policy'', and ''linux-tools-generic'' provides the module for it to actually work
-  linux-tools-common linux-tools-generic
-====== Scripts ======
-===== AC =====
-  * Change the ''backlight'' sysfs as-needed (see [[#backlight1|backlight notes]]) or remove altogether
-  sudo mkdir -p '/etc/udev/scripts.d' && sudo -e '/etc/udev/scripts.d/ac-power.sh' && sudo chmod +x '/etc/udev/scripts.d/ac-power.sh'
-<code>
-#!/usr/bin/bash
-# AC
-echo "$(cat '/sys/class/backlight/'*'/max_brightness')" | tee '/sys/class/backlight/'*'/brightness' > '/dev/null'
-x86_energy_perf_policy --all 'balance-performance' --turbo-enable '1' --force
-# End</code>
-===== Battery =====
-  * Change the ''backlight'' sysfs as-needed (see [[#backlight1|backlight notes]]) or remove altogether
-  sudo mkdir -p '/etc/udev/scripts.d' && sudo -e '/etc/udev/scripts.d/battery-power.sh' && sudo chmod +x '/etc/udev/scripts.d/battery-power.sh'
-<code>
-#!/usr/bin/bash
-# Battery
-echo '3750' | tee '/sys/class/backlight/'*'/brightness' > '/dev/null'
-x86_energy_perf_policy --all 'balance-power' --turbo-enable '0' --force
-# End</code>
-===== udev Rule =====
-  * Requires the above AC and Battery scripts
-  sudo -e '/etc/udev/rules.d/99-power.rules' && sudo udevadm control --reload
-<code>
-SUBSYSTEM=="power_supply", ATTR{online}=="1", RUN+="/etc/udev/scripts.d/ac-power.sh"
-SUBSYSTEM=="power_supply", ATTR{online}=="0", RUN+="/etc/udev/scripts.d/battery-power.sh"</code>