Copyright (c) 2005 Jonathan Gray <jsg@openbsd.org>
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.Dd $Mdocdate: September 3 2011 $ .Dt APS 4 .Os .Sh NAME .Nm aps .Nd ThinkPad Active Protection System accelerometer .Sh SYNOPSIS .Cd "aps0 at isa? port 0x1600" .Sh DESCRIPTION The .Nm driver provides support for several sensors found in some ThinkPad laptops.
p The sensors currently exposed via the .Xr sysctl 8 interface are: l -column "Keyboard Active" "Unknown" "Typical Use" -offset indent t Sy "Sensor" Ta Sy "Units" Ta Sy "Typical Use" t Li "X_ACCEL" Ta "Unknown" Ta "X Acceleration" t Li "Y_ACCEL" Ta "Unknown" Ta "Y Acceleration" t Li "X_VAR" Ta "Unknown" Ta "Weighted X Acceleration?" t Li "Y_VAR" Ta "Unknown" Ta "Weighted Y Acceleration?" t Li "Temp1" Ta "uK" Ta "Unknown" t Li "Temp2" Ta "uK" Ta "Unknown" t Li "Keyboard Active" Ta "boolean" Ta "Keyboard activity" t Li "Mouse Active" Ta "boolean" Ta "Mouse activity" t Li "Lid Open" Ta "boolean" Ta "Lid state" .El .Sh SEE ALSO .Xr isa 4 , .Xr sensorsd 8 , .Xr sysctl 8 .Sh HISTORY The .Nm driver first appeared in .Ox 3.8 . .Sh AUTHORS The .Nm driver was written by .An Jonathan Gray Aq Mt jsg@openbsd.org . .Sh CAVEATS The .Nm driver does not yet maintain state and subsequently does not take evasive action when it thinks the hard drive is in danger.
p The Y axis on X40 and possibly other models seems to be inverted. It is unknown how to distinguish between different versions of the accelerometer to compensate for this in the driver at this time.
p As IBM provides no documentation, it is not known what all the available sensors are used for.