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POWER(4) Device Drivers Manual (sgi) POWER(4)

powerpower button

power0 at macebus0 (O2)
power0 at mainbus0 (Octane)

The SGI O2 and Octane machines generate an interrupt when the power button on the front panel is pressed. The power driver catches that interrupt. If the hw.allowpowerdown sysctl(8) is set to 1, power will then signal init(8) to do a clean shutdown(8).

intro(4), macebus(4), init(8), rc.shutdown(8), sysctl(8)

Support for the power driver first appeared in OpenBSD 4.3.

The power driver was written by Jasper Lievisse Adriaanse <>.

July 16, 2013 OpenBSD-6.3