Fnfx enables owners of toshiba laptops to change the lcd brightness, control, the internal fan and use the special keys on their keyboard (fn-x combinations, hot-keys). the internal functions will give the possibility to map the fn-keys to functions like volume up/down, mute, suspend to disk, suspend to ram and switch lcd/crt/tv-out. these functions heavily depend on the system and/or kernel configuration. you will need at least a kernel (v2.4.x, v2.5.x, v2.6.x) with acpi and toshiba support (config_acpi and config_acpi_toshiba).