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.Dd May 29, 2020
.Dt ACPICALL 8
.Os
.Sh NAME
.Nm acpicall
.Nd call ACPI methods
.Sh SYNOPSIS
.Nm
.Op Fl v
.Op Fl b Ar hexstring
.Op Fl d Ar file
.Op Fl i Ar number
.Op Fl o Ar i | s | b | o
.Op Fl s Ar string
.Op Fl U Ar uuid
.Ar path
.Sh DESCRIPTION
The
.Nm
utility calls the ACPI method
.Ar path
with the arguments specified by any
.Fl b ,
.Fl i ,
.Fl o ,
.Fl s ,
and
.Fl U
options.
The
.Ar path
argument must be a full ACPI namespace path such as
.Pa \e_SB.PCI0.PEGR.GFX0._DSM .
.Pp
Note that in order to be able to use the
.Nm
utility, the
.Va debug.acpi.allow_method_calls
loader tunable must be specified in
.Pa /boot/loader.conf .
.Pp
The following options are supported:
.Bl -tag -width indent
.It Fl b Ar hexstring
Pass
.Ar hexstring
as a buffer argument.
.It Fl d Ar file
Specify the path of the ACPI control device.
The default is
.Pa /dev/acpi .
.It Fl i Ar number
Pass
.Ar number
as an integer argument.
.It Fl o Ar i | s | b | o
Choose the format to print the result in:
.Ar ( i ) Ns nteger ,
.Ar ( s ) Ns tring ,
.Ar ( b ) Ns uffer ,
or
.Ar ( o ) Ns bject .
.It Fl s Ar string
Pass
.Ar string
as a string argument.
.It Fl U Ar uuid
Pass
.Ar uuid
as a buffer argument.
.It Fl v
Increase verbosity.
.El
.Sh EXAMPLES
Note that many ACPI methods are specific to the BIOS and machine in
question, so it is impossible to present any generic examples that will
work everywhere.
Some familiarity with ASL and the DSDT code of the specific machine to
be tweaked is highly recommended.
.Pp
The following calls were successfully used to turn off the discrete
.Tn NVIDIA
GPU on the
.Tn Optimus
based
.Tn Asus K53SV
laptop:
.Bd -literal
acpicall -U a486d8f8-0bda-471b-a72b-6042a6b5bee0 \e
         -i 256 -i 26 -b 01000003 "\e_SB.PCI0.PEGR.GFX0._DSM"

acpicall "\e_SB.PCI0.PEGR.GFX0._PS3"
.Ed
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr acpibin 8 ,
.Xr acpiconf 8 ,
.Xr acpidump 8 ,
.Xr acpiexec 8 ,
.Xr acpihelp 8 ,
.Xr acpixtract 8 ,
.Xr iasl 8
.Sh AUTHORS
.Nm
is based on the
.Nm acpi_call
utility by
.An Maxim Ignatenko Aq Mt gelraen.ua@gmail.com .
This manual page was written by
.An Sascha Wildner .