What is acpi?
"In computing, the Advanced Configuration and Power Interface (ACPI) specification provides an open standard for device configuration and power management by the operating system." (Wikipedia)
What is acpid?
"ACPID is a completely flexible, totally extensible daemon for delivering ACPI events. It listens on a file (/proc/acpi/event) and when an event occurs, executes programs to handle the event. The programs it executes are configured through a set of configuration files, which can be dropped into place by packages or by the admin." (acpid Sourceforge)
Preparing to install
Before we are ready to emerge acpid, it is a good idea to modify a few things in the kernel. If you have not modified your kernel before, you may want to check out the following page on configuring a kernel manually (page to be added..).
Optional: Other ACPI features
Below are the locations and short descriptions of the function of different ACPI options in the kernel. In the majority of cases, you do not have to alter any of these to have a functional ACPI system.
- AC Adapter
- Processor Aggregator
- Thermal Zone
After configuring the kernel power management options, we are ready to install acpid.To emerge acpid, do the following:
# emerge -av acpid
Adding to rc
After you have finished emerging acpid, you may want to add it to the list of rc services to be started with your system at boot.
# rc-update add acpid default
Then, run the following to start acpid: