ABTN(4)              OpenBSD Programmer's Manual (MacPPC)              ABTN(4)

NAME
     abtn - apple brightness/volume button control

SYNOPSIS
     abtn at adb?

DESCRIPTION
     The abtn driver allows you to dim the brightness of your display.  This
     driver only currently recognizes the dim and brightness button.  Sound,
     numlock and eject buttons are also handled by this driver but are silent-
     ly ignored.

SEE ALSO
     adb(4), aed(4)

AUTHOR
     The abtn driver was written by Tsubai Masanari for NetBSD.

BUGS
     The bright/dim buttons currently don't work on new 2001 iBooks.  It's
     best to just disable the driver to avoid freeze ups when pressing these
     buttons.

OpenBSD 3.0                      July 30, 2001                               1
