TIP ACPI basic configuration

From Gentoo Linux Wiki

This article is part of the Tips & Tricks series.

Terminals / Shells • Network • X Window System • Portage • System • Filesystems • Kernel • Other

Originally taken from linux.gentoo.user on Google Groups

ACPI (Advanced Configuration and Power Interface) is an interface for OS-directed configuration and power management. Devices such as AC adapters, Battery management, Thermal Controllers, Fans, and Lid Switches, as well as the usual Power On/Off and Sleep buttons are a few examples of such.

1 Install
2 Run
3 Configuration
4 Links

[edit] Install

The tools for ACPI are found under sys-power/acpid.

emerge --ask --verbose sys-power/acpid

As of linux 2.6.23, you will need to manually enable the deprecated /proc/events/acpi option.

[edit] Run

You can turn it on using:

/etc/init.d/acpid start

To turn acpid on when you start the machine, add it to the default runlevel:

rc-update add acpid default

If you add any config files while ACPI is running you have to restart it to reload the rules

/etc/init.d/acpid restart

[edit] Configuration

Following are some configuration file examples for setting up ACPI after it is emerged.

Remember to make the scripts executable!

chmod +x /etc/acpi/<script-filename>

[edit] Lid

File: /etc/acpi/events/lid

event=button/lid.*
action=/etc/acpi/lid.sh

File: /etc/acpi/lid.sh

#!/bin/bash

if [ "`sed -e "s/.[^ ]* *//" /proc/acpi/ac_adapter/AC/state`" = "on-line" ]
        then
                logger "ACPI: AC adapter is on-line, not hibernating..."
        else
                logger "ACPI: AC adapter is off-line, hibernating..."
                hibernate-ram
fi

[edit] Sleep

File: /etc/acpi/events/sleep

event=button/sleep.*
action=/etc/acpi/sleep.sh

File: /etc/acpi/events/battery

event=battery.*
action=echo -e "\a"

File: /etc/acpi/sleep.sh

#!/bin/bash

logger "ACPI: Time to sleep"
touch /tmp/was_sleeping
echo -n standby > /sys/power/state

[edit] Power

File: /etc/acpi/events/power

event=button/power.*
action=/etc/acpi/power.sh

File: /etc/acpi/power.sh

#!/bin/bash

if [ ! -f /tmp/was_sleeping ]

        then
                touch /tmp/was_sleeping
                echo -n standby >| /sys/power/state # S1
#               echo -n disk >| /sys/power/state    # Suspend 2 Disk
#               /etc/init.d/shutdown.sh
        else
                rm -f /tmp/was_sleeping
                logger "ACPI: Was on S1 State. I'm not going to sleep mode"
fi