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ACPIBTN(4)               BSD Kernel Interfaces Manual               ACPIBTN(4)

NAME
     acpibtn -- ACPI button

SYNOPSIS
     acpibtn* at acpi?

DESCRIPTION
     The acpibtn driver is used to handle the event triggered when the user
     presses an ACPI button.  Currently, the only event handled is the press
     of a power button which causes the system to perform a regular system
     shutdown and power off the machine if the hw.allowpowerdown sysctl(8) is
     set to 1.

SEE ALSO
     acpi(4), intro(4)

HISTORY
     The acpibtn driver first appeared in OpenBSD 3.9.

AUTHORS
     The acpibtn driver was written by Marco Peereboom <marco@openbsd.org>.

BSD                             March 30, 2017                             BSD