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