5 menu "ACPI (Advanced Configuration and Power Interface) Support"
7 depends on !IA64_HP_SIM
12 depends on IA64 || X86
17 Advanced Configuration and Power Interface (ACPI) support for
18 Linux requires an ACPI compliant platform (hardware/firmware),
19 and assumes the presence of OS-directed configuration and power
20 management (OSPM) software. This option will enlarge your
23 Linux ACPI provides a robust functional replacement for several
24 legacy configuration and power management interfaces, including
25 the Plug-and-Play BIOS specification (PnP BIOS), the
26 MultiProcessor Specification (MPS), and the Advanced Power
27 Management (APM) specification. If both ACPI and APM support
28 are configured, whichever is loaded first shall be used.
30 The ACPI SourceForge project contains the latest source code,
31 documentation, tools, mailing list subscription, and other
32 information. This project is available at:
33 <http://sourceforge.net/projects/acpi>
35 Linux support for ACPI is based on Intel Corporation's ACPI
36 Component Architecture (ACPI CA). For more information see:
37 <http://developer.intel.com/technology/iapc/acpi>
39 ACPI is an open industry specification co-developed by Compaq,
40 Intel, Microsoft, Phoenix, and Toshiba. The specification is
42 <http://www.acpi.info>
48 depends on X86 && (!SMP || SUSPEND_SMP)
52 This option adds support for ACPI suspend states.
54 With this option, you will be able to put the system "to sleep".
55 Sleep states are low power states for the system and devices. All
56 of the system operating state is saved to either memory or disk
57 (depending on the state), to allow the system to resume operation
58 quickly at your request.
60 Although this option sounds really nifty, barely any of the device
61 drivers have been converted to the new driver model and hence few
62 have proper power management support.
64 This option is not recommended for anyone except those doing driver
65 power management development.
67 config ACPI_SLEEP_PROC_FS
69 depends on ACPI_SLEEP && PROC_FS
72 config ACPI_SLEEP_PROC_SLEEP
73 bool "/proc/acpi/sleep (deprecated)"
74 depends on ACPI_SLEEP_PROC_FS
77 Create /proc/acpi/sleep
78 Deprecated by /sys/power/state
81 bool "Procfs interface (deprecated)"
85 Procfs interface for ACPI is made optional for back-compatible.
86 As the same functions are duplicated in sysfs interface
87 and this proc interface will be removed some time later,
88 it's marked as deprecated.
89 ( /proc/acpi/debug_layer && debug_level are deprecated by
90 /sys/module/acpi/parameters/debug_layer && debug_level.
91 /proc/acpi/info is deprecated by
92 /sys/module/acpi/parameters/acpica_version )
99 This driver adds support for the AC Adapter object, which indicates
100 whether a system is on AC, or not. If you have a system that can
101 switch between A/C and battery, say Y.
108 This driver adds support for battery information through
109 /proc/acpi/battery. If you have a mobile system with a battery,
116 This driver handles events on the power, sleep and lid buttons.
117 A daemon reads /proc/acpi/event and perform user-defined actions
118 such as shutting down the system. This is necessary for
119 software controlled poweroff.
125 This driver implement the ACPI Extensions For Display Adapters
126 for integrated graphics devices on motherboard, as specified in
127 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
128 control like defining the video POST device, retrieving EDID information
129 or to setup a video output, etc.
130 Note that this is an ref. implementation only. It may or may not work
131 for your integrated video device.
134 tristate "Generic Hotkey (EXPERIMENTAL)"
135 depends on EXPERIMENTAL
139 Experimental consolidated hotkey driver.
140 If you are unsure, say N.
146 This driver adds support for ACPI fan devices, allowing user-mode
147 applications to perform basic fan control (on, off, status).
151 depends on EXPERIMENTAL
153 This driver adds support for ACPI controlled docking stations
155 config ACPI_PROCESSOR
159 This driver installs ACPI as the idle handler for Linux, and uses
160 ACPI C2 and C3 processor states to save power, on systems that
161 support it. It is required by several flavors of cpufreq
162 Performance-state drivers.
164 config ACPI_HOTPLUG_CPU
166 depends on ACPI_PROCESSOR && HOTPLUG_CPU
167 select ACPI_CONTAINER
171 tristate "Thermal Zone"
172 depends on ACPI_PROCESSOR
175 This driver adds support for ACPI thermal zones. Most mobile and
176 some desktop systems support ACPI thermal zones. It is HIGHLY
177 recommended that this option be enabled, as your processor(s)
178 may be damaged without it.
183 depends on (X86 || IA64)
184 default y if IA64_GENERIC || IA64_SGI_SN2
187 tristate "ASUS/Medion Laptop Extras"
190 This driver provides support for extra features of ACPI-compatible
191 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
192 support some Medion laptops (such as 9675 for example). It makes all
193 the extra buttons generate standard ACPI events that go through
194 /proc/acpi/events, and (on some models) adds support for changing the
195 display brightness and output, switching the LCD backlight on and off,
196 and most importantly, allows you to blink those fancy LEDs intended
197 for reporting mail and wireless status.
199 Note: display switching code is currently considered EXPERIMENTAL,
200 toying with these values may even lock your machine.
202 All settings are changed via /proc/acpi/asus directory entries. Owner
203 and group for these entries can be set with asus_uid and asus_gid
206 More information and a userspace daemon for handling the extra buttons
207 at <http://sourceforge.net/projects/acpi4asus/>.
209 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
210 driver is still under development, so if your laptop is unsupported or
211 something works not quite as expected, please use the mailing list
212 available on the above page (acpi4asus-user@lists.sourceforge.net)
215 tristate "IBM ThinkPad Laptop Extras"
218 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
219 support for Fn-Fx key combinations, Bluetooth control, video
220 output switching, ThinkLight control, UltraBay eject and more.
221 For more information about this driver see <file:Documentation/ibm-acpi.txt>
222 and <http://ibm-acpi.sf.net/> .
224 If you have an IBM ThinkPad laptop, say Y or M here.
227 bool "Legacy Docking Station Support"
229 depends on ACPI_DOCK=n
232 Allows the ibm_acpi driver to handle docking station events.
233 This support is obsoleted by CONFIG_HOTPLUG_PCI_ACPI. It will
234 allow locking and removing the laptop from the docking station,
235 but will not properly connect PCI devices.
237 If you are not sure, say N here.
240 tristate "Toshiba Laptop Extras"
243 This driver adds support for access to certain system settings
244 on "legacy free" Toshiba laptops. These laptops can be recognized by
245 their lack of a BIOS setup menu and APM support.
247 On these machines, all system configuration is handled through the
248 ACPI. This driver is required for access to controls not covered
249 by the general ACPI drivers, such as LCD brightness, video output,
252 This driver differs from the non-ACPI Toshiba laptop driver (located
253 under "Processor type and features") in several aspects.
254 Configuration is accessed by reading and writing text files in the
255 /proc tree instead of by program interface to /dev. Furthermore, no
256 power management functions are exposed, as those are handled by the
257 general ACPI drivers.
259 More information about this driver is available at
260 <http://memebeam.org/toys/ToshibaAcpiDriver>.
262 If you have a legacy free Toshiba laptop (such as the Libretto L1
265 config ACPI_CUSTOM_DSDT
266 bool "Include Custom DSDT"
267 depends on !STANDALONE
270 This option is to load a custom ACPI DSDT
271 If you don't know what that is, say N.
273 config ACPI_CUSTOM_DSDT_FILE
274 string "Custom DSDT Table file to include"
275 depends on ACPI_CUSTOM_DSDT
278 Enter the full path name to the file which includes the AmlCode
281 config ACPI_BLACKLIST_YEAR
282 int "Disable ACPI for systems before Jan 1st this year" if X86_32
285 enter a 4-digit year, eg. 2001 to disable ACPI by default
286 on platforms with DMI BIOS date before January 1st that year.
287 "acpi=force" can be used to override this mechanism.
289 Enter 0 to disable this mechanism and allow ACPI to
290 run by default no matter what the year. (default)
293 bool "Debug Statements"
296 The ACPI driver can optionally report errors with a great deal
297 of verbosity. Saying Y enables these statements. This will increase
298 your kernel size by around 50K.
304 This driver is required on some systems for the proper operation of
305 the battery and thermal drivers. If you are compiling for a
306 mobile system, say Y.
316 This driver will enable your system to shut down using ACPI, and
317 dump your ACPI DSDT table using /proc/acpi/dsdt.
320 bool "Power Management Timer Support" if EMBEDDED
324 The Power Management Timer is available on all ACPI-capable,
325 in most cases even if ACPI is unusable or blacklisted.
327 This timing source is not affected by power management features
328 like aggressive processor idling, throttling, frequency and/or
329 voltage scaling, unlike the commonly used Time Stamp Counter
332 You should nearly always say Y here because many modern
333 systems require this timer.
335 config ACPI_CONTAINER
336 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
337 depends on EXPERIMENTAL
338 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
340 This allows _physical_ insertion and removal of CPUs and memory.
341 This can be useful, for example, on NUMA machines that support
342 ACPI based physical hotplug of nodes, or non-NUMA machines that
343 support physical cpu/memory hot-plug.
345 If one selects "m", this driver can be loaded with
346 "modprobe acpi_container".
348 config ACPI_HOTPLUG_MEMORY
349 tristate "Memory Hotplug"
351 depends on MEMORY_HOTPLUG
354 This driver adds supports for ACPI Memory Hotplug. This driver
355 provides support for fielding notifications on ACPI memory
356 devices (PNP0C80) which represent memory ranges that may be
357 onlined or offlined during runtime.
359 Enabling this driver assumes that your platform hardware
360 and firmware have support for hot-plugging physical memory. If
361 your system does not support physically adding or ripping out
362 memory DIMMs at some platform defined granularity (individually
363 or as a bank) at runtime, then you need not enable this driver.
365 If one selects "m," this driver can be loaded using the following
367 $>modprobe acpi_memhotplug
370 tristate "Smart Battery System (EXPERIMENTAL)"
371 depends on X86 && I2C
372 depends on EXPERIMENTAL
374 This driver adds support for the Smart Battery System.
375 Depends on I2C (Device Drivers ---> I2C support)
376 A "Smart Battery" is quite old and quite rare compared
377 to today's ACPI "Control Method" battery.