====== Information ======

  * ''x86_energy_perf_policy'' as udev rule
  * Alternative to ''tuned'', ''tlp'', etc

===== Prerequisites =====

  * [[linux;distros;opensuse_tumbleweed_gnome|openSUSE Tumbleweed (GNOME)]]

  sudo zypper remove --clean-deps 'tuned'

  sudo zypper addlock 'tuned'

  sudo zypper install 'cpupower'

===== Check =====

  watch --interval '0.5' grep \'cpu MHz\' '/proc/cpuinfo'

  sudo x86_energy_perf_policy

===== Max Perf =====

****

  sudo x86_energy_perf_policy --all 'performance' --turbo-enable '1' --force

====== Scripts ======

===== AC =====

  sudo mkdir -p '/etc/udev/scripts.d' && sudo -e '/etc/udev/scripts.d/ac-power.sh' && sudo restorecon -F -I -R '/etc/udev/scripts.d' && sudo chmod +x '/etc/udev/scripts.d/ac-power.sh'

<code>
#!/bin/bash
x86_energy_perf_policy --all 'performance' --turbo-enable '1' --force</code>

===== Battery =====

  sudo mkdir -p '/etc/udev/scripts.d' && sudo -e '/etc/udev/scripts.d/battery-power.sh' && sudo restorecon -F -I -R '/etc/udev/scripts.d' && sudo chmod +x '/etc/udev/scripts.d/battery-power.sh'

<code>
#!/bin/bash
x86_energy_perf_policy --all 'balance-power' --turbo-enable '0' --force</code>

===== udev Rule =====

  sudo -e '/etc/udev/rules.d/99-power.rules' && sudo restorecon -F -I '/etc/udev/rules.d/99-power.rules' && sudo udevadm control --reload

<code>
ACTION=="add|change", SUBSYSTEM=="power_supply", ATTRS{type}=="Mains", ATTRS{online}=="1", RUN+="/etc/udev/scripts.d/ac-power.sh"
ACTION=="add|change", SUBSYSTEM=="power_supply", ATTRS{type}=="Mains", ATTRS{online}=="0", RUN+="/etc/udev/scripts.d/battery-power.sh"</code>

===== Check =====

  * Should report something like ''Write to unrecognized MSR 0x770 by x86_energy_perf'' early boot and on AC hot-plug

  sudo dmesg | grep 'MSR'

  watch --interval '0.5' grep \'cpu MHz\' '/proc/cpuinfo'