ACPI Full Form

ACPI stands for Advanced Configuration and Power Interface . As the name suggests, ACPI is responsible for the management of power in our computer system. This specification was introduced by Microsoft, Intel, and Toshiba. It helps the operating system to control the amount of power that is being given to other computer devices when they are not in use such as cd players, printers, etc.

Characteristics of ACPI

• Power management
• Directing your computer which programs should be given power.
• Some controls are given to the user also, for example, setting up the sleep time, etc.
• The contents are shifted to an image file and get saved in your computer’s hard drive which is restored again when the computer is switched on.

Advantages of ACPI

• Longer use of the battery is achieved
• Hibernation mode is available
• Allow user to set the ‘shut down’ time
• Allow the operating system to reduce the power given to the motherboard and other devices that are not in use.

Disadvantages of ACPI

• When ACPI puts _ADR devices in deep sleep, it results in a problem.
• When a bus (for attaching hardware devices example PCI) is expecting and the devices are in deep sleep it creates an issue because buses don’t expect the devices to disconnect from the bus when they are powered down.