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