Important: You are required to change your passwords used for Gentoo services and set an email address for your Wiki account if you haven't done so. See the full announcement and Wiki email policy change for more information.

Power management

From Gentoo Wiki
Jump to: navigation, search
External resources

This articles describes methods to save energy for a longer battery runtime, for a more quiet computer, for lower power cost and for conserve the environment.


Disable unused devices right in the BIOS, e.g.:

  • Serial ports
  • Parallel ports
  • Ethernet network devices
  • Bluetooth controllers


Devices, which can save energy during runtime:

Udev rules to automize power management


# PCI runtime power management
ACTION=="add", SUBSYSTEM=="pci", ATTR{power/control}="auto"

# USB autosuspend
ACTION=="add", SUBSYSTEM=="usb", ATTR{power/control}="auto"
ACTION=="add", SUBSYSTEM=="usb", TEST=="power/autosuspend" ATTR{power/autosuspend}="60"

# SATA active link power management
SUBSYSTEM=="scsi_host", KERNEL=="host*", ATTR{link_power_management_policy}="min_power"

# Wlan power save
ACTION=="add", SUBSYSTEM=="net", KERNEL=="wlan*" RUN+="/usr/sbin/iw dev %k set power_save on"

# Disable bluetooth
SUBSYSTEM=="rfkill", ATTR{type}=="bluetooth", ATTR{state}="0"

# Disable wake-on-LAN
ACTION=="add", SUBSYSTEM=="net", KERNEL=="eth*" RUN+="/usr/sbin/ethtool -s %k wol d"

Other Resources