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