The system can be shut down, that is, powered off, automatically after a configurable period of idleness. This period is known as the autoshutdown threshold. This behavior is enabled by default for SPARC desktop systems first shipped after October 1, 1995 and before July 1, 1999. See the power.conf(4)man page for more information. Autoshutdown can be overridden using dtpower(1M) or power.conf(4).