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ACPIBTN(4) Device Drivers Manual ACPIBTN(4)

ACPI button

acpibtn* at acpi?

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.

acpi(4), intro(4)

The acpibtn driver first appeared in OpenBSD 3.9.

The acpibtn driver was written by Marco Peereboom <marco@openbsd.org>.
July 16, 2013 OpenBSD-current