toshiba_hci works by using the Intel SMM interface and using
it to send appropriate values to the Toshiba HCI. This tool re-
implements several of the functions of the 'Toshiba laptops
extras' and ACPI Linux kernel patches, as well as adding extra
functionality, but all in a user-space program that does not
require any kernel patching. It can do things like alter the LCD
brightness, turn the system fan on and off, and more.