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. )
97 This driver adds support for the AC Adapter object, which indicates
98 whether a system is on AC, or not. If you have a system that can
99 switch between A/C and battery, say Y.
106 This driver adds support for battery information through
107 /proc/acpi/battery. If you have a mobile system with a battery,
114 This driver handles events on the power, sleep and lid buttons.
115 A daemon reads /proc/acpi/event and perform user-defined actions
116 such as shutting down the system. This is necessary for
117 software controlled poweroff.
123 This driver implement the ACPI Extensions For Display Adapters
124 for integrated graphics devices on motherboard, as specified in
125 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
126 control like defining the video POST device, retrieving EDID information
127 or to setup a video output, etc.
128 Note that this is an ref. implementation only. It may or may not work
129 for your integrated video device.
132 tristate "Generic Hotkey (EXPERIMENTAL)"
133 depends on EXPERIMENTAL
137 Experimental consolidated hotkey driver.
138 If you are unsure, say N.
144 This driver adds support for ACPI fan devices, allowing user-mode
145 applications to perform basic fan control (on, off, status).
149 depends on EXPERIMENTAL
151 This driver adds support for ACPI controlled docking stations
153 config ACPI_PROCESSOR
157 This driver installs ACPI as the idle handler for Linux, and uses
158 ACPI C2 and C3 processor states to save power, on systems that
159 support it. It is required by several flavors of cpufreq
160 Performance-state drivers.
162 config ACPI_HOTPLUG_CPU
164 depends on ACPI_PROCESSOR && HOTPLUG_CPU
165 select ACPI_CONTAINER
169 tristate "Thermal Zone"
170 depends on ACPI_PROCESSOR
173 This driver adds support for ACPI thermal zones. Most mobile and
174 some desktop systems support ACPI thermal zones. It is HIGHLY
175 recommended that this option be enabled, as your processor(s)
176 may be damaged without it.
181 depends on (X86 || IA64)
182 default y if IA64_GENERIC || IA64_SGI_SN2
185 tristate "ASUS/Medion Laptop Extras"
188 This driver provides support for extra features of ACPI-compatible
189 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
190 support some Medion laptops (such as 9675 for example). It makes all
191 the extra buttons generate standard ACPI events that go through
192 /proc/acpi/events, and (on some models) adds support for changing the
193 display brightness and output, switching the LCD backlight on and off,
194 and most importantly, allows you to blink those fancy LEDs intended
195 for reporting mail and wireless status.
197 Note: display switching code is currently considered EXPERIMENTAL,
198 toying with these values may even lock your machine.
200 All settings are changed via /proc/acpi/asus directory entries. Owner
201 and group for these entries can be set with asus_uid and asus_gid
204 More information and a userspace daemon for handling the extra buttons
205 at <http://sourceforge.net/projects/acpi4asus/>.
207 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
208 driver is still under development, so if your laptop is unsupported or
209 something works not quite as expected, please use the mailing list
210 available on the above page (acpi4asus-user@lists.sourceforge.net)
213 tristate "IBM ThinkPad Laptop Extras"
216 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
217 support for Fn-Fx key combinations, Bluetooth control, video
218 output switching, ThinkLight control, UltraBay eject and more.
219 For more information about this driver see <file:Documentation/ibm-acpi.txt>
220 and <http://ibm-acpi.sf.net/> .
222 If you have an IBM ThinkPad laptop, say Y or M here.
225 bool "Legacy Docking Station Support"
227 depends on ACPI_DOCK=n
230 Allows the ibm_acpi driver to handle docking station events.
231 This support is obsoleted by CONFIG_HOTPLUG_PCI_ACPI. It will
232 allow locking and removing the laptop from the docking station,
233 but will not properly connect PCI devices.
235 If you are not sure, say N here.
238 tristate "Toshiba Laptop Extras"
241 This driver adds support for access to certain system settings
242 on "legacy free" Toshiba laptops. These laptops can be recognized by
243 their lack of a BIOS setup menu and APM support.
245 On these machines, all system configuration is handled through the
246 ACPI. This driver is required for access to controls not covered
247 by the general ACPI drivers, such as LCD brightness, video output,
250 This driver differs from the non-ACPI Toshiba laptop driver (located
251 under "Processor type and features") in several aspects.
252 Configuration is accessed by reading and writing text files in the
253 /proc tree instead of by program interface to /dev. Furthermore, no
254 power management functions are exposed, as those are handled by the
255 general ACPI drivers.
257 More information about this driver is available at
258 <http://memebeam.org/toys/ToshibaAcpiDriver>.
260 If you have a legacy free Toshiba laptop (such as the Libretto L1
263 config ACPI_CUSTOM_DSDT
264 bool "Include Custom DSDT"
265 depends on !STANDALONE
268 This option is to load a custom ACPI DSDT
269 If you don't know what that is, say N.
271 config ACPI_CUSTOM_DSDT_FILE
272 string "Custom DSDT Table file to include"
273 depends on ACPI_CUSTOM_DSDT
276 Enter the full path name to the file which includes the AmlCode
279 config ACPI_BLACKLIST_YEAR
280 int "Disable ACPI for systems before Jan 1st this year" if X86_32
283 enter a 4-digit year, eg. 2001 to disable ACPI by default
284 on platforms with DMI BIOS date before January 1st that year.
285 "acpi=force" can be used to override this mechanism.
287 Enter 0 to disable this mechanism and allow ACPI to
288 run by default no matter what the year. (default)
291 bool "Debug Statements"
294 The ACPI driver can optionally report errors with a great deal
295 of verbosity. Saying Y enables these statements. This will increase
296 your kernel size by around 50K.
302 This driver is required on some systems for the proper operation of
303 the battery and thermal drivers. If you are compiling for a
304 mobile system, say Y.
314 This driver will enable your system to shut down using ACPI, and
315 dump your ACPI DSDT table using /proc/acpi/dsdt.
318 bool "Power Management Timer Support" if EMBEDDED
322 The Power Management Timer is available on all ACPI-capable,
323 in most cases even if ACPI is unusable or blacklisted.
325 This timing source is not affected by power management features
326 like aggressive processor idling, throttling, frequency and/or
327 voltage scaling, unlike the commonly used Time Stamp Counter
330 You should nearly always say Y here because many modern
331 systems require this timer.
333 config ACPI_CONTAINER
334 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
335 depends on EXPERIMENTAL
336 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
338 This allows _physical_ insertion and removal of CPUs and memory.
339 This can be useful, for example, on NUMA machines that support
340 ACPI based physical hotplug of nodes, or non-NUMA machines that
341 support physical cpu/memory hot-plug.
343 If one selects "m", this driver can be loaded with
344 "modprobe acpi_container".
346 config ACPI_HOTPLUG_MEMORY
347 tristate "Memory Hotplug"
349 depends on MEMORY_HOTPLUG
352 This driver adds supports for ACPI Memory Hotplug. This driver
353 provides support for fielding notifications on ACPI memory
354 devices (PNP0C80) which represent memory ranges that may be
355 onlined or offlined during runtime.
357 Enabling this driver assumes that your platform hardware
358 and firmware have support for hot-plugging physical memory. If
359 your system does not support physically adding or ripping out
360 memory DIMMs at some platform defined granularity (individually
361 or as a bank) at runtime, then you need not enable this driver.
363 If one selects "m," this driver can be loaded using the following
365 $>modprobe acpi_memhotplug
368 tristate "Smart Battery System (EXPERIMENTAL)"
369 depends on X86 && I2C
370 depends on EXPERIMENTAL
372 This driver adds support for the Smart Battery System.
373 Depends on I2C (Device Drivers ---> I2C support)
374 A "Smart Battery" is quite old and quite rare compared
375 to today's ACPI "Control Method" battery.