570 lines
15 KiB
Groff
570 lines
15 KiB
Groff
.\" $NetBSD: acpi.4,v 1.86 2018/03/04 02:10:26 pgoyette Exp $
|
|
.\"
|
|
.\" Copyright (c) 2002, 2004, 2010 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd March 4, 2018
|
|
.Dt ACPI 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm acpi
|
|
.Nd Advanced Configuration and Power Interface
|
|
.Sh SYNOPSIS
|
|
.Cd acpi0 at mainbus0
|
|
.Pp
|
|
.Cd options ACPI_DEBUG
|
|
.Cd options ACPIVERBOSE
|
|
.Cd options ACPI_ACTIVATE_DEV
|
|
.Cd options ACPI_DSDT_OVERRIDE
|
|
.Cd options ACPI_DSDT_FILE=""
|
|
.Cd options ACPI_BLACKLIST_YEAR=2000
|
|
.Cd options ACPI__DIS_IS_BROKEN
|
|
.Sh DESCRIPTION
|
|
.Nx
|
|
provides machine-independent bus support for
|
|
Advanced Configuration and Power Interface (ACPI)
|
|
devices and includes several ACPI device drivers.
|
|
.Pp
|
|
The
|
|
.Nx
|
|
implementation of ACPI integrates Intel's ACPI Component Architecture
|
|
(ACPI-CA) for the OS-independent part.
|
|
The ACPI-CA provides OS-neutral ACPI functionalities such as ACPI BIOS
|
|
table support,
|
|
an ACPI event framework and an ACPI Machine Language (AML) interpreter.
|
|
.Pp
|
|
Options:
|
|
.Bl -tag -width ACPI_DSDT_FILE__filename_XX -offset 3n
|
|
.It Dv ACPI_DEBUG
|
|
Enable various debug facilities.
|
|
.It Dv ACPIVERBOSE
|
|
Enable verbose debug messages.
|
|
.It Dv ACPI_ACTIVATE_DEV
|
|
Determine if the ACPI driver should attempt to activate inactive devices.
|
|
The default is off.
|
|
.It Dv ACPI_DSDT_OVERRIDE
|
|
Force a given Differentiated System Description Table (DSDT)
|
|
instead of the version supplied by the BIOS.
|
|
Use
|
|
.Dv ACPI_DSDT_FILE
|
|
to specify a DSDT.
|
|
.It Dv ACPI_DSDT_FILE="filename"
|
|
If
|
|
.Dv ACPI_DSDT_FILE
|
|
is not specified, default to
|
|
.Dq dsdt.hex
|
|
in the build directory.
|
|
.It Dv ACPI_BLACKLIST_YEAR=2000
|
|
Do not use ACPI with any BIOS made on or before the specified year.
|
|
.It Dv ACPI__DIS_IS_BROKEN
|
|
Do not call the ACPI "_DIS" method to disable interrupt links.
|
|
This may be required on specific
|
|
.Dq nForce4
|
|
chipset systems, which hard hang when this method is called instead of
|
|
having it fail gracefully.
|
|
.El
|
|
.Sh SYSCTL SUPPORT
|
|
The following
|
|
.Xr sysctl 8
|
|
variables are provided by the
|
|
.Nm
|
|
driver:
|
|
.Bl -tag -width "123456" -offset indent
|
|
.It Ic hw.acpi.root
|
|
The address of the ACPI root pointer in system memory.
|
|
.It Ic hw.acpi.sleep.state
|
|
The system sleep state.
|
|
.It Ic hw.acpi.sleep.states
|
|
A list of system sleep states that the machine supports.
|
|
The possible values are:
|
|
.Pp
|
|
.Bl -tag -width XS1X -offset indent -compact
|
|
.It S0
|
|
fully running
|
|
.It S1
|
|
power on suspend (CPU and hard disks are off)
|
|
.It S2
|
|
similar to S3, usually not implemented
|
|
.It S3
|
|
suspend-to-RAM
|
|
.It S4
|
|
suspend-to-disk (not supported on
|
|
.Nx )
|
|
.It S5
|
|
power off
|
|
.El
|
|
.It Ic hw.acpi.sleep.beep
|
|
A boolean variable that controls whether the PC
|
|
speaker beeps upon resume.
|
|
Only available on i386 and amd64 architectures.
|
|
.It Ic hw.acpi.sleep.vbios
|
|
Defines the handling of the graphics card on i386 and amd64 architectures.
|
|
The supported values are:
|
|
.Bl -tag -width '2' -offset 2n
|
|
.It 0
|
|
No attempt to reset the VGA controller will be made.
|
|
.It 1
|
|
Call the VGA BIOS when still in real mode.
|
|
This can result in direct reboots.
|
|
In that case, use
|
|
.Sq 2
|
|
or
|
|
.Ic vbetool post
|
|
from the
|
|
.Pa pkgsrc/sysutils/vbetool
|
|
package.
|
|
.It 2
|
|
Call the VGA BIOS using the in-kernel x86 emulator.
|
|
.El
|
|
.Pp
|
|
If the system has problems in resuming from the S3
|
|
state, experimenting with different values may provide a solution.
|
|
.It Ic hw.acpi.stat.gpe
|
|
The number of dispatched General Purpose Events (GPEs).
|
|
.It Ic hw.acpi.stat.sci
|
|
The number of System Control Interrupts (SCIs).
|
|
See
|
|
.Xr acpiec 4
|
|
for a brief description of both GPEs and SCIs.
|
|
.It Ic hw.acpi.stat.fixed
|
|
The number of
|
|
.Dq fixed events .
|
|
.It Ic hw.acpi.stat.method
|
|
The number of AML methods executed by the interpreter.
|
|
.It Ic hw.acpi.power
|
|
This read-only node describes the ACPI power state of devices.
|
|
The values range from D0
|
|
.Pq Dq on
|
|
to D3
|
|
.Pq Dq off .
|
|
.It Ic hw.acpi.wake
|
|
This node represents devices that can wake the system from the S3 or
|
|
S4 sleep state.
|
|
By default,
|
|
.Xr acpibut 4 ,
|
|
.Xr acpilid 4 ,
|
|
and
|
|
.Xr pckbd 4
|
|
are allowed to wake the system, provided that the devices are present and
|
|
the firmware supports wake-up capabilities for the devices.
|
|
.El
|
|
.Sh SUPPORTED DEVICES
|
|
.Nx
|
|
ACPI supports several machine-dependent and machine-independent devices,
|
|
some specific to ACPI and some configured via it.
|
|
.Ss Machine-independent devices
|
|
.Bl -tag -width "thinkpad(4) " -offset indent -compact
|
|
.It Xr acpiacad 4
|
|
ACPI AC adapters.
|
|
.It Xr acpibat 4
|
|
ACPI batteries.
|
|
.It Xr acpibut 4
|
|
ACPI power and sleep buttons.
|
|
.It Xr acpicpu 4
|
|
ACPI processors.
|
|
.It Xr acpidalb 4
|
|
ACPI direction application launch buttons.
|
|
.It Xr acpiec 4
|
|
ACPI embedded controllers.
|
|
.It Xr acpiecdt 4
|
|
ACPI Embedded Controller Boot Resource Table (ECDT).
|
|
.It Xr acpifan 4
|
|
ACPI fans.
|
|
.It Xr acpilid 4
|
|
ACPI lid switches.
|
|
.It Xr acpipmtr 4
|
|
ACPI power meters.
|
|
.It Xr acpismbus 4
|
|
ACPI SMBus via control method interface (CMI).
|
|
.It Xr acpitz 4
|
|
ACPI thermal zones.
|
|
.It Xr acpivga 4
|
|
ACPI display adapter and output devices.
|
|
.It Xr acpiwmi 4
|
|
ACPI support for Windows Management Instrumentation.
|
|
.It Xr acpiwdrt 4
|
|
ACPI watchdogs.
|
|
.It Xr aibs 4
|
|
ASUSTeK voltage, temperature and fan sensors.
|
|
.It Xr asus 4
|
|
ASUS laptop hotkeys.
|
|
.It Xr attimer 4
|
|
AT Timer.
|
|
.It Xr com 4
|
|
NS8250-, NS16450-, and NS16550-based serial ports.
|
|
.It Xr fdc 4
|
|
Floppy disk controllers.
|
|
.It Xr fujbp 4
|
|
Fujitsu brightness and pointer.
|
|
.It Xr fujhk 4
|
|
Fujitsu hotkeys.
|
|
.It Xr hpacel 4
|
|
HP 3D DriveGuard accelerometer.
|
|
.It Xr hpet 4
|
|
High Precision Event Timer (HPET).
|
|
.It Xr hpqlb 4
|
|
HP Quick Launch Buttons.
|
|
.It Xr joy 4
|
|
Joystick/Game port interface.
|
|
.It Xr lpt 4
|
|
Standard ISA parallel port interface.
|
|
.It Xr mpu 4
|
|
Roland MPU-401 (compatible) MIDI UART.
|
|
.It Xr pcppi 4
|
|
AT-style speaker sound.
|
|
.It Xr sdhc 4
|
|
SD Host Controller.
|
|
.It Xr thinkpad 4
|
|
IBM/Lenovo ThinkPad laptop device driver.
|
|
.It Xr ug 4
|
|
Abit uGuru Hardware monitor.
|
|
.It Xr vald 4
|
|
Toshiba Libretto device.
|
|
.It Xr valz 4
|
|
Toshiba Dynabook device.
|
|
.It Xr wb 4
|
|
Winbond W83L518D Integrated Media Reader.
|
|
.It Xr wss 4
|
|
Windows Sound System-compatible sound cards
|
|
.It Xr ym 4
|
|
Yamaha OPL3-SA2 and OPL3-SA3 audio device driver.
|
|
.El
|
|
.Ss i386-dependent devices
|
|
.Bl -tag -width "thinkpad(4) " -offset indent -compact
|
|
.It Xr pckbc 4
|
|
PC keyboard controllers.
|
|
.It Xr sony 4
|
|
Sony Miscellaneous Controller
|
|
.It Xr spic 4
|
|
Sony programmable I/O controller.
|
|
.El
|
|
.Sh DEBUGGING
|
|
Although the situation has become better over the years,
|
|
ACPI is typically prone to various errors,
|
|
ranging from blatant flaws in the firmware to bugs in the implementation.
|
|
Before anything else, it is a good practice to upgrade the BIOS
|
|
to the latest version available from the vendor.
|
|
.Pp
|
|
To ease the task of diagnosing and fixing different problems, the
|
|
ACPICA reference implementation provides a rich
|
|
facility of different debugging methods.
|
|
In
|
|
.Nx
|
|
these are generally only available if the kernel has been compiled with the
|
|
.Dv ACPI_DEBUG
|
|
option.
|
|
.Ss Verbose messages
|
|
The
|
|
.Dv ACPIVERBOSE
|
|
compile time option enables some verbose
|
|
debug messages printed during the system startup.
|
|
In a
|
|
.Dv MODULAR
|
|
(see
|
|
.Xr options 4 )
|
|
system, the information can be printed also at runtime,
|
|
regardless of the presence of
|
|
.Dv ACPIVERBOSE .
|
|
To print the messages,
|
|
.Xr modload 8
|
|
the
|
|
.Ic acpiverbose
|
|
module using the option
|
|
.Fl b Cm dump=true .
|
|
.Ss Custom DSDT
|
|
ACPI interprets bytecode known as ACPI Machine Language (AML),
|
|
provided by the BIOS as a memory image during the system bootstrap.
|
|
Most of the AML relevant to
|
|
.Nm
|
|
is implemented in the so-called
|
|
Differentiated System Descriptor Table (DSDT).
|
|
.Nx
|
|
provides support for overriding the default DSDT supplied by the BIOS.
|
|
.Pp
|
|
The following steps can be used to override the DSDT:
|
|
.Bl -enum -offset indent
|
|
.It
|
|
Dump the raw DSDT with
|
|
.Xr acpidump 8 .
|
|
.It
|
|
Disassemble the table with
|
|
.Xr iasl 8 .
|
|
.It
|
|
Modify the disassembled table.
|
|
.It
|
|
Compile the table with
|
|
.Xr iasl 8
|
|
using the option
|
|
.Fl tc .
|
|
.It
|
|
Either copy the
|
|
.Pq Pa *.hex
|
|
file to
|
|
.Bd -literal -offset indent
|
|
src/sys/dev/acpi/acpica/Osd/custom_dsdt.hex
|
|
.Ed
|
|
.Pp
|
|
or use the option
|
|
.Bd -literal -offset indent
|
|
ACPI_DSDT_FILE="/some/directory/custom_dsdt.hex"
|
|
.Ed
|
|
.Pp
|
|
in the kernel configuration file.
|
|
.It
|
|
Define
|
|
.Dv ACPI_DSDT_OVERRIDE
|
|
in the kernel configuration file and rebuild.
|
|
.El
|
|
.Ss Debugger
|
|
The ACPICA interpreter provides its own debugger for low-level debugging.
|
|
It can be used to display internal data structures and namespace objects,
|
|
and to debug the execution of control methods.
|
|
Single step and breakpoint functionality are available.
|
|
In
|
|
.Nx
|
|
this is integrated to the in-kernel
|
|
.Xr ddb 4 .
|
|
In order to enter the ACPICA debugger from
|
|
.Xr ddb 4 ,
|
|
use the command
|
|
.Ic call
|
|
with the argument
|
|
.Ic acpi_osd_debugger .
|
|
.Ss Debug Output
|
|
.Nx
|
|
provides three
|
|
.Xr sysctl 8
|
|
variables that control the debug output at runtime.
|
|
The
|
|
.Ic hw.acpi.debug.layer
|
|
variable limits the output to a specific ACPI layer and the
|
|
.Ic hw.acpi.debug.level
|
|
variable controls the debug level.
|
|
Both
|
|
.Xr sysctl 8
|
|
variables are string literals.
|
|
The third variable is
|
|
.Ic hw.acpi.debug.object .
|
|
This is a boolean that controls whether debug messages internal to the
|
|
AML are enabled.
|
|
.Pp
|
|
For the first two variables, the possible values are:
|
|
.Bl -column -offset indent \
|
|
"ACPI_RESOURCE_COMPONENT " "ACPI_RESOURCE_COMPONENT "
|
|
.It Sy LAYER Ta Sy LEVEL
|
|
.It Dv ACPI_DEBUG_NONE Ta Dv ACPI_DEBUG_NONE
|
|
.It Ta
|
|
.It Dv ACPI_UTILITIES Ta Dv ACPI_LV_INIT
|
|
.It Dv ACPI_HARDWARE Ta Dv ACPI_LV_DEBUG_OBJECT
|
|
.It Dv ACPI_EVENTS Ta Dv ACPI_LV_INFO
|
|
.It Dv ACPI_TABLES Ta Dv ACPI_LV_ALL_EXCEPTIONS No *
|
|
.It Dv ACPI_NAMESPACE Ta
|
|
.It Dv ACPI_PARSER Ta Dv ACPI_LV_INIT_NAMES
|
|
.It Dv ACPI_DISPATCHER Ta Dv ACPI_LV_PARSE
|
|
.It Dv ACPI_EXECUTER Ta Dv ACPI_LV_LOAD
|
|
.It Dv ACPI_RESOURCES Ta Dv ACPI_LV_DISPATCH
|
|
.It Dv ACPI_CA_DEBUGGER Ta Dv ACPI_LV_EXEC
|
|
.It Dv ACPI_OS_SERVICES Ta Dv ACPI_LV_NAMES
|
|
.It Dv ACPI_CA_DISASSEMBLER Ta Dv ACPI_LV_OPREGION
|
|
.It Dv ACPI_COMPILER Ta Dv ACPI_LV_BFIELD
|
|
.It Dv ACPI_TOOLS Ta Dv ACPI_LV_TABLES
|
|
.It Dv ACPI_EXAMPLE Ta Dv ACPI_LV_VALUES
|
|
.It Dv ACPI_DRIVER Ta Dv ACPI_LV_OBJECTS
|
|
.It Dv ACPI_ALL_COMPONENTS No * Ta Dv ACPI_LV_RESOURCES
|
|
.It Ta Dv ACPI_LV_USER_REQUESTS
|
|
.It Dv ACPI_BUS_COMPONENT Ta Dv ACPI_LV_PACKAGE
|
|
.It Dv ACPI_ACAD_COMPONENT Ta Dv ACPI_LV_VERBOSITY1 No *
|
|
.It Dv ACPI_BAT_COMPONENT Ta
|
|
.It Dv ACPI_BUTTON_COMPONENT Ta Dv ACPI_LV_ALLOCATIONS
|
|
.It Dv APCI_EC_COMPONENT Ta Dv ACPI_LV_FUNCTIONS
|
|
.It Dv ACPI_LID_COMPONENT Ta Dv ACPI_LV_OPTIMIZATIONS
|
|
.It Dv ACPI_RESOURCE_COMPONENT Ta Dv ACPI_LV_VERBOSITY2 No *
|
|
.It Dv ACPI_TZ_COMPONENT Ta
|
|
.It Dv ACPI_DISPLAY_COMPONENT Ta
|
|
.It Dv ACPI_ALL_DRIVERS No * Ta Dv ACPI_LV_MUTEX
|
|
.It Ta Dv ACPI_LV_THREADS
|
|
.It Ta Dv ACPI_LV_IO
|
|
.It Ta Dv ACPI_LV_AML_INTERRUPTS
|
|
.It "* This is a compound" Ta Dv ACPI_LV_VERBOSITY3 No *
|
|
.It " constant, including" Ta
|
|
.It " all previous elements." Ta Dv ACPI_LV_AML_DISASSEMBLE
|
|
.It Ta Dv ACPI_LV_VERBOSE_INFO
|
|
.It Ta Dv ACPI_LV_FULL_TABLES
|
|
.It Ta Dv ACPI_LV_EVENTS
|
|
.It Ta Dv ACPI_LV_VERBOSE No *
|
|
.El
|
|
.Pp
|
|
In addition, there is
|
|
.Dv ACPI_DEBUG_DEFAULT
|
|
that is used by ACPICA as the default debug level.
|
|
It includes
|
|
.Dv ACPI_LV_INIT
|
|
and
|
|
.Dv ACPI_LV_DEBUG_OBJECT .
|
|
.Pp
|
|
The debug layer can be divided into two groups:
|
|
the first one is specific to the ACPICA
|
|
interpreter and the second one contains the internal ACPI
|
|
components of
|
|
.Nx .
|
|
The constant
|
|
.Dv ACPI_ALL_DRIVERS
|
|
includes all
|
|
.Nx
|
|
specific parts.
|
|
.Pp
|
|
The ACPICA interpreter uses several debug levels internally,
|
|
but the
|
|
.Nx
|
|
specific parts are typically limited to
|
|
.Dv ACPI_LV_DEBUG_OBJECT
|
|
and
|
|
.Dv ACPI_LV_INFO .
|
|
The debug output can be stopped by setting
|
|
.Ic hw.acpi.debug.level
|
|
to
|
|
.Dv ACPI_DEBUG_NONE .
|
|
.Ss Example
|
|
As an example, a driver may have defined the component it belongs to and
|
|
the name of the module:
|
|
.Bd -literal -offset indent
|
|
#define _COMPONENT ACPI_BUS_COMPONENT
|
|
ACPI_MODULE_NAME ("acpi_example")
|
|
.Ed
|
|
.Pp
|
|
The driver may also utilize the debug facility:
|
|
.Bd -literal -offset indent
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Failed to evaluate _STA\\n"));
|
|
.Ed
|
|
.Pp
|
|
With these options the debug message from the
|
|
.Dv ACPI_DEBUG_PRINT
|
|
macro is only visible when
|
|
.Ic hw.acpi.debug.layer
|
|
is either
|
|
.Dv ACPI_BUS_COMPONENT
|
|
or a compound constant including it, and
|
|
.Ic hw.acpi.debug.level
|
|
is
|
|
.Dv ACPI_LV_INFO
|
|
or some constant that includes it.
|
|
Finally, it can be noted that the ACPI implementation uses the prefix
|
|
.Dv ACPI_DB ,
|
|
whereas the debug level
|
|
.Xr sysctl 8
|
|
variable is always specified with the prefix
|
|
.Dv ACPI_LV .
|
|
.Pp
|
|
Another example can be mentioned for the use of
|
|
.Ic hw.acpi.debug.object .
|
|
The following could appear in an ASL code:
|
|
.Bd -literal -offset indent
|
|
Method(_Q19, 0, NotSerialized)
|
|
{
|
|
Store("_Q19 invoked", Debug)
|
|
Notify(ACAD, 0x80)
|
|
}
|
|
.Ed
|
|
.Pp
|
|
When
|
|
.Ic hw.acpi.debug.object
|
|
is set to 1, the message stored to the debug object
|
|
is printed every time the method is called by the interpreter.
|
|
.Sh SEE ALSO
|
|
.Xr ioapic 4 ,
|
|
.Xr acpidump 8 ,
|
|
.Xr amldb 8 ,
|
|
.Xr iasl 8
|
|
.Rs
|
|
.%A Hewlett-Packard Corporation
|
|
.%A Intel Corporation
|
|
.%A Microsoft Corporation
|
|
.%A Phoenix Technologies Ltd.
|
|
.%A Toshiba Corporation
|
|
.%T Advanced Configuration and Power Interface Specification
|
|
.%N Revision 4.0
|
|
.%D June 16, 2009
|
|
.%U http://www.acpi.info/spec.htm
|
|
.Re
|
|
.Rs
|
|
.%A Intel Corporation
|
|
.%T ACPI Component Architecture,
|
|
.%T Programmer Reference,
|
|
.%T OS-Independent Subsystem, Debugger, and Utilities
|
|
.%N Revision 1.27
|
|
.%D January 20, 2010
|
|
.%U http://www.acpica.org/download/acpica-reference.pdf
|
|
.Re
|
|
.Rs
|
|
.%A Len Brown
|
|
.%T ACPI in Linux - Myths vs. Reality
|
|
.%D June 27-30, 2007
|
|
.%O Proceedings of the Linux Symposium
|
|
.%P 65-74
|
|
.%U http://www.linuxsymposium.org/archives/OLS/Reprints-2007/brown_1-Reprint.pdf
|
|
.Re
|
|
.Rs
|
|
.%A Joerg Sonnenberger
|
|
.%A Jared D. McNeill
|
|
.%T Sleeping Beauty - NetBSD on Modern Laptops
|
|
.%D February 3, 2008
|
|
.%O Proceedings of AsiaBSDCon 2008
|
|
.%P 127-134
|
|
.%U http://2008.asiabsdcon.org/papers/P9A-paper.pdf
|
|
.Re
|
|
.Rs
|
|
.%A Takanori Watanabe
|
|
.%T ACPI Implementation on FreeBSD
|
|
.%I USENIX Association
|
|
.%B Proceedings of the FREENIX Track: 2002 USENIX Annual Technical Conference
|
|
.%P 121-131
|
|
.%D June 10-15, 2002
|
|
.%U http://www.usenix.org/event/usenix02/tech/freenix/full_papers/watanabe/watanabe.pdf
|
|
.Re
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
driver
|
|
appeared in
|
|
.Nx 1.6 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
Authors of the
|
|
.Nm
|
|
subsystem include
|
|
.An Charles M. Hannum ,
|
|
.An Frank van der Linden ,
|
|
.An Jared D. McNeill ,
|
|
.An Jason R. Thorpe ,
|
|
.An Joerg Sonnenberger ,
|
|
and
|
|
.An Jukka Ruohonen ,
|
|
among others.
|
|
.Sh BUGS
|
|
Most of the ACPI power management functionalities are not implemented.
|
|
.Pp
|
|
The
|
|
.Dv ACPI__DIS_IS_BROKEN
|
|
option should not be necessary.
|