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ACPIAdvanced Configuration 和 Power Management Interface)是power management 系统是 BIOS 的一部分。

安装

内核

ACPI 需要开启下列内核选项:

KERNEL
Power management and ACPI options  --->
    [*] Power Management support
        [*] ACPI (Advanced Configuration and Power Interface) Support  --->
Optional drivers
Option Module Recommend Description
Deprecated /proc/acpi files - No Creates deprecated files in the procfs filesystem, which are now replaced by files in the sysfs filesystem.
Deprecated power /proc/acpi directories - No Creates deprecated files in the procfs filesystem, which are now replaced by files in the sysfs filesystem.
EC read/write access through /sys/kernel/debug/ec ec-debugfs No Debug interface to the Embedded Controller.
Deprecated /proc/acpi/event support - No Creates deprecated files in the procfs filesystem, which are now replaced by the input layer or netlink events.
AC Adapter ac Laptops Creates files to tell, if your system is connected to AC.
Battery battery Laptops Creates files to tell, if your system is powered by a battery.
Button button - Handles events on the power, sleep, and lid buttons.
Video video - Supports basic operations for graphics adapters.
Fan fan - Supports ACPI fan devices, allowing user-mode applications to perform basic fan control (on, off, status).
Dock dock - Supports ACPI-controlled docking stations and removable drive bays, see the acpi dock article.
Processor processor - Installs ACPI as the idle handler for Linux and uses ACPI C2 and C3 processor states to save power.
Processor Aggregator processor-aggregator - ACPI 4.0 function to perform specific processor configuration and control.
Thermal Zone thermal Yes Supports ACPI thermal zones to protect your processor against overheating.
NUMA support - -
Debug Statements - No
PCI slot detection driver pci-slot No Helps to correlate PCI bus addresses with physical slots
Container and Module Devices container - Supports ACPI Container and Module devices to hotplug nodes, CPUs, and memory.
Smart Battery System sbs, sbshc - Supports another type of access to battery information, found on some laptops.
Hardware Error Device hed - Supports the Hardware Error Device, which is used to report some hardware errors.
Allow ACPI methods to be inserted/replaced at run time custom-method No
ACPI Platform Error Interface (APEI) - - APEI allows to report errors (for example from the chipset) to the operating system.

Emerge

桌面环境对 ACPI 生成的常见事件做出反应。如果未安装桌面环境但想让系统对特殊事件做出反应,则可以安装 ACPI 包。安装 sys-power/acpid 包:

root #emerge --ask sys-power/acpid

USE 标记

Several packages know about the global acpi USE flag. There are no use flags available for sys-power/acpid at this time.

SELinux

为了让 acpid 能够关闭 SELinux 系统,请确保安装了 sec-policy/selinux-shutdown 包并且重新标记了 /sbin/shutdown 可执行文件:

root #emerge --ask sec-policy/selinux-shutdown

配置

/etc/acpi 中的脚本定义了系统如何对 ACPI 事件做出反应。它们可以根据需要进行编辑以满足用户的要求。

服务

OpenRC

现在可以启动 acpid 服务。使用 OpenRC 时运行:

root #/etc/init.d/acpid start

要在系统启动时运行 acpid 服务,请将其添加到默认运行级别:

root #rc-update add acpid default

systemd

如果 systemd 被用作 init system,使用以下命令在系统启动时开启 acpid 服务:

root #systemctl enable acpid.service

现在启动服务:

root #systemctl start acpid.service

进阶示例

The default ACPI setup may be satisfactory for some users, however a little extra configuration may be required to get the acpid daemon to treat some basic ACPI events properly (AC power plug in/out, multimedia keys, etc.).

Modifications can be make to /etc/acpi/default.sh along with /etc/acpi/events/default if necessary. Why not create a complicated setup that makes use of the /etc/acpi/actions and /etc/acpi/events capabilities? Simply put scripts and event files in those locations for advanced usage.

对于大多数用户来说一个基本的 default.sh 文件可能就足够了,但是下面是一个使用 default.sh “可以”完成的示例:

FILE /etc/acpi/default.sh
#!/bin/sh
#
# $Header: /etc/acpi/default.sh                          Exp $
# $Author: (c) 2012-2014 -tclover <tokiclover@dotfiles.> Exp $
# $License: MIT (or 2-clause/new/simplified BSD)         Exp $
# $Version: 2014/12/24 21:09:26                          Exp $
#
 
log() { logger -p daemon "ACPI: $*"; }
uhd() { log "event unhandled: $*"; }
 
set $*
group=${1%/*}
action=${1#*/}
device=$2
id=$3
value=$4
 
[ -d /dev/snd ] && alsa=true || alsa=false
[ -d /dev/oss ] && oss=true || oss=false
amixer="amixer -q set Master"
ossmix="ossmix -- vmix0-outvol"
 
case $group in
	ac_adapter)
		case $value in
			*0) log "switching to power.bat power profile"
				hprofile power.bat;;
			*1) log "switching to power.adp power profile"
				hprofile power.adp;;
			*) uhd $*;;
		esac
		;;
	battery)
		case $value in
			*0) log "switching to power.adp power profile"
				hprofile power.adp;;
			*1) log "switching to power.adp power profile"
				hprofile power.adp;;
			*) uhd $*;;
		esac
		;;
	button)
		case $action in
			lid)
				case "$id" in
					close) hibernate-ram;;
					open) :;;
					*) uhd $*;;
				esac
				;;
			power) shutdown -H now;;
			sleep) hibernate-ram;;
			mute) 
				$alsa && $amixer toggle;;
			volumeup) 
				$alsa && $amixer 3dB+
				$oss && $ossmix +3;;
			volumedown) 
				$alsa && $amixer 3dB-
				$oss && $ossmix -3;;
			*) uhd $*;;
		esac
		;;
	cd)
		case $action in
			play) :;;
			stop) :;;
			prev) :;;
			next) :;;
			*) uhd $*;;
		esac
		;;
	jack)
		case $id in
			*plug) :;;
			*) uhd $*;;
		esac
		;;
	video)
		case $action in
			displayoff) :;;
			*) uhd $*;;
		esac
		;;
	*) uhd $*;;
esac
 
unset alsa oss amixer ossmix group action device id
 
# vim:fenc=utf-8:ft=sh:ci:pi:sts=4:sw=4:ts=4:
附注
注意上面的脚本兼容 ALSAOSS,所以从 ALSA 切换 OSS 或相反的情况下不需要额外的操作。不要犹豫,编辑脚本!
附注
上面的脚本还使用了 hprofile 的电源管理特定配置文件。更多信息请参阅 hprofile 文章。

另请参阅