5 menu "ACPI (Advanced Configuration and Power Interface) Support"
8 depends on !IA64_HP_SIM
14 depends on IA64 || X86
20 Advanced Configuration and Power Interface (ACPI) support for
21 Linux requires an ACPI compliant platform (hardware/firmware),
22 and assumes the presence of OS-directed configuration and power
23 management (OSPM) software. This option will enlarge your
26 Linux ACPI provides a robust functional replacement for several
27 legacy configuration and power management interfaces, including
28 the Plug-and-Play BIOS specification (PnP BIOS), the
29 MultiProcessor Specification (MPS), and the Advanced Power
30 Management (APM) specification. If both ACPI and APM support
31 are configured, whichever is loaded first shall be used.
33 The ACPI SourceForge project contains the latest source code,
34 documentation, tools, mailing list subscription, and other
35 information. This project is available at:
36 <http://sourceforge.net/projects/acpi>
38 Linux support for ACPI is based on Intel Corporation's ACPI
39 Component Architecture (ACPI CA). For more information see:
40 <http://developer.intel.com/technology/iapc/acpi>
42 ACPI is an open industry specification co-developed by Compaq,
43 Intel, Microsoft, Phoenix, and Toshiba. The specification is
45 <http://www.acpi.info>
51 depends on X86 && (!SMP || SUSPEND_SMP)
55 This option adds support for ACPI suspend states.
57 With this option, you will be able to put the system "to sleep".
58 Sleep states are low power states for the system and devices. All
59 of the system operating state is saved to either memory or disk
60 (depending on the state), to allow the system to resume operation
61 quickly at your request.
63 Although this option sounds really nifty, barely any of the device
64 drivers have been converted to the new driver model and hence few
65 have proper power management support.
67 This option is not recommended for anyone except those doing driver
68 power management development.
70 config ACPI_SLEEP_PROC_FS
72 depends on ACPI_SLEEP && PROC_FS
75 config ACPI_SLEEP_PROC_SLEEP
76 bool "/proc/acpi/sleep (deprecated)"
77 depends on ACPI_SLEEP_PROC_FS
80 Create /proc/acpi/sleep
81 Deprecated by /sys/power/state
84 bool "Procfs interface (deprecated)"
88 Procfs interface for ACPI is made optional for back-compatible.
89 As the same functions are duplicated in sysfs interface
90 and this proc interface will be removed some time later,
91 it's marked as deprecated.
92 ( /proc/acpi/debug_layer && debug_level are deprecated by
93 /sys/module/acpi/parameters/debug_layer && debug_level.
94 /proc/acpi/info is deprecated by
95 /sys/module/acpi/parameters/acpica_version )
102 This driver adds support for the AC Adapter object, which indicates
103 whether a system is on AC, or not. If you have a system that can
104 switch between A/C and battery, say Y.
111 This driver adds support for battery information through
112 /proc/acpi/battery. If you have a mobile system with a battery,
120 This driver handles events on the power, sleep and lid buttons.
121 A daemon reads /proc/acpi/event and perform user-defined actions
122 such as shutting down the system. This is necessary for
123 software controlled poweroff.
127 depends on X86 && BACKLIGHT_CLASS_DEVICE
129 This driver implement the ACPI Extensions For Display Adapters
130 for integrated graphics devices on motherboard, as specified in
131 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
132 control like defining the video POST device, retrieving EDID information
133 or to setup a video output, etc.
134 Note that this is an ref. implementation only. It may or may not work
135 for your integrated video device.
141 This driver adds support for ACPI fan devices, allowing user-mode
142 applications to perform basic fan control (on, off, status).
146 depends on EXPERIMENTAL
148 This driver adds support for ACPI controlled docking stations
151 tristate "Removable Drive Bay (EXPERIMENTAL)"
152 depends on EXPERIMENTAL
155 This driver adds support for ACPI controlled removable drive
156 bays such as the IBM ultrabay or the Dell Module Bay.
158 config ACPI_PROCESSOR
162 This driver installs ACPI as the idle handler for Linux, and uses
163 ACPI C2 and C3 processor states to save power, on systems that
164 support it. It is required by several flavors of cpufreq
165 Performance-state drivers.
167 config ACPI_HOTPLUG_CPU
169 depends on ACPI_PROCESSOR && HOTPLUG_CPU
170 select ACPI_CONTAINER
174 tristate "Thermal Zone"
175 depends on ACPI_PROCESSOR
178 This driver adds support for ACPI thermal zones. Most mobile and
179 some desktop systems support ACPI thermal zones. It is HIGHLY
180 recommended that this option be enabled, as your processor(s)
181 may be damaged without it.
186 depends on (X86 || IA64)
187 default y if IA64_GENERIC || IA64_SGI_SN2
190 tristate "ASUS/Medion Laptop Extras"
192 select BACKLIGHT_CLASS_DEVICE
194 This driver provides support for extra features of ACPI-compatible
195 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
196 support some Medion laptops (such as 9675 for example). It makes all
197 the extra buttons generate standard ACPI events that go through
198 /proc/acpi/events, and (on some models) adds support for changing the
199 display brightness and output, switching the LCD backlight on and off,
200 and most importantly, allows you to blink those fancy LEDs intended
201 for reporting mail and wireless status.
203 Note: display switching code is currently considered EXPERIMENTAL,
204 toying with these values may even lock your machine.
206 All settings are changed via /proc/acpi/asus directory entries. Owner
207 and group for these entries can be set with asus_uid and asus_gid
210 More information and a userspace daemon for handling the extra buttons
211 at <http://sourceforge.net/projects/acpi4asus/>.
213 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
214 driver is still under development, so if your laptop is unsupported or
215 something works not quite as expected, please use the mailing list
216 available on the above page (acpi4asus-user@lists.sourceforge.net).
218 NOTE: This driver is deprecated and will probably be removed soon,
219 use asus-laptop instead.
222 tristate "IBM ThinkPad Laptop Extras"
224 select BACKLIGHT_CLASS_DEVICE
226 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
227 support for Fn-Fx key combinations, Bluetooth control, video
228 output switching, ThinkLight control, UltraBay eject and more.
229 For more information about this driver see <file:Documentation/ibm-acpi.txt>
230 and <http://ibm-acpi.sf.net/> .
232 If you have an IBM ThinkPad laptop, say Y or M here.
235 bool "Legacy Docking Station Support"
237 depends on ACPI_DOCK=n
240 Allows the ibm_acpi driver to handle docking station events.
241 This support is obsoleted by CONFIG_HOTPLUG_PCI_ACPI. It will
242 allow locking and removing the laptop from the docking station,
243 but will not properly connect PCI devices.
245 If you are not sure, say N here.
248 tristate "Toshiba Laptop Extras"
250 select BACKLIGHT_CLASS_DEVICE
252 This driver adds support for access to certain system settings
253 on "legacy free" Toshiba laptops. These laptops can be recognized by
254 their lack of a BIOS setup menu and APM support.
256 On these machines, all system configuration is handled through the
257 ACPI. This driver is required for access to controls not covered
258 by the general ACPI drivers, such as LCD brightness, video output,
261 This driver differs from the non-ACPI Toshiba laptop driver (located
262 under "Processor type and features") in several aspects.
263 Configuration is accessed by reading and writing text files in the
264 /proc tree instead of by program interface to /dev. Furthermore, no
265 power management functions are exposed, as those are handled by the
266 general ACPI drivers.
268 More information about this driver is available at
269 <http://memebeam.org/toys/ToshibaAcpiDriver>.
271 If you have a legacy free Toshiba laptop (such as the Libretto L1
274 config ACPI_CUSTOM_DSDT
275 bool "Include Custom DSDT"
276 depends on !STANDALONE
279 This option is to load a custom ACPI DSDT
280 If you don't know what that is, say N.
282 config ACPI_CUSTOM_DSDT_FILE
283 string "Custom DSDT Table file to include"
284 depends on ACPI_CUSTOM_DSDT
287 Enter the full path name to the file which includes the AmlCode
290 config ACPI_BLACKLIST_YEAR
291 int "Disable ACPI for systems before Jan 1st this year" if X86_32
294 enter a 4-digit year, eg. 2001 to disable ACPI by default
295 on platforms with DMI BIOS date before January 1st that year.
296 "acpi=force" can be used to override this mechanism.
298 Enter 0 to disable this mechanism and allow ACPI to
299 run by default no matter what the year. (default)
302 bool "Debug Statements"
305 The ACPI driver can optionally report errors with a great deal
306 of verbosity. Saying Y enables these statements. This will increase
307 your kernel size by around 50K.
313 This driver is required on some systems for the proper operation of
314 the battery and thermal drivers. If you are compiling for a
315 mobile system, say Y.
325 This driver will enable your system to shut down using ACPI, and
326 dump your ACPI DSDT table using /proc/acpi/dsdt.
329 bool "Power Management Timer Support" if EMBEDDED
333 The Power Management Timer is available on all ACPI-capable,
334 in most cases even if ACPI is unusable or blacklisted.
336 This timing source is not affected by power management features
337 like aggressive processor idling, throttling, frequency and/or
338 voltage scaling, unlike the commonly used Time Stamp Counter
341 You should nearly always say Y here because many modern
342 systems require this timer.
344 config ACPI_CONTAINER
345 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
346 depends on EXPERIMENTAL
347 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
349 This allows _physical_ insertion and removal of CPUs and memory.
350 This can be useful, for example, on NUMA machines that support
351 ACPI based physical hotplug of nodes, or non-NUMA machines that
352 support physical cpu/memory hot-plug.
354 If one selects "m", this driver can be loaded with
355 "modprobe acpi_container".
357 config ACPI_HOTPLUG_MEMORY
358 tristate "Memory Hotplug"
360 depends on MEMORY_HOTPLUG
363 This driver adds supports for ACPI Memory Hotplug. This driver
364 provides support for fielding notifications on ACPI memory
365 devices (PNP0C80) which represent memory ranges that may be
366 onlined or offlined during runtime.
368 Enabling this driver assumes that your platform hardware
369 and firmware have support for hot-plugging physical memory. If
370 your system does not support physically adding or ripping out
371 memory DIMMs at some platform defined granularity (individually
372 or as a bank) at runtime, then you need not enable this driver.
374 If one selects "m," this driver can be loaded using the following
376 $>modprobe acpi_memhotplug
379 tristate "Smart Battery System (EXPERIMENTAL)"
380 depends on X86 && I2C
381 depends on EXPERIMENTAL
383 This driver adds support for the Smart Battery System.
384 Depends on I2C (Device Drivers ---> I2C support)
385 A "Smart Battery" is quite old and quite rare compared
386 to today's ACPI "Control Method" battery.