This document serves as a user guide for ACPI (Advanced Configuration and Power Interface) features in FreeBSD, detailing aspects such as CPU power management, thermal controls, video output, docking stations, and proprietary hotkeys. It outlines the functionality and necessary configurations for effective use of these ACPI features, emphasizing the importance of enhancements to suspend/resume capabilities, particularly concerning video drivers. The guide concludes with a call for further development and support to improve ACPI functionality on FreeBSD systems.