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
153 This driver adds support for ACPI controlled removable drive
154 bays such as the IBM ultrabay or the Dell Module Bay.
156 config ACPI_PROCESSOR
160 This driver installs ACPI as the idle handler for Linux, and uses
161 ACPI C2 and C3 processor states to save power, on systems that
162 support it. It is required by several flavors of cpufreq
163 Performance-state drivers.
165 config ACPI_HOTPLUG_CPU
167 depends on ACPI_PROCESSOR && HOTPLUG_CPU
168 select ACPI_CONTAINER
172 tristate "Thermal Zone"
173 depends on ACPI_PROCESSOR
176 This driver adds support for ACPI thermal zones. Most mobile and
177 some desktop systems support ACPI thermal zones. It is HIGHLY
178 recommended that this option be enabled, as your processor(s)
179 may be damaged without it.
184 depends on (X86 || IA64)
185 default y if IA64_GENERIC || IA64_SGI_SN2
188 tristate "ASUS/Medion Laptop Extras"
190 select BACKLIGHT_CLASS_DEVICE
192 This driver provides support for extra features of ACPI-compatible
193 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
194 support some Medion laptops (such as 9675 for example). It makes all
195 the extra buttons generate standard ACPI events that go through
196 /proc/acpi/events, and (on some models) adds support for changing the
197 display brightness and output, switching the LCD backlight on and off,
198 and most importantly, allows you to blink those fancy LEDs intended
199 for reporting mail and wireless status.
201 Note: display switching code is currently considered EXPERIMENTAL,
202 toying with these values may even lock your machine.
204 All settings are changed via /proc/acpi/asus directory entries. Owner
205 and group for these entries can be set with asus_uid and asus_gid
208 More information and a userspace daemon for handling the extra buttons
209 at <http://sourceforge.net/projects/acpi4asus/>.
211 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
212 driver is still under development, so if your laptop is unsupported or
213 something works not quite as expected, please use the mailing list
214 available on the above page (acpi4asus-user@lists.sourceforge.net).
216 NOTE: This driver is deprecated and will probably be removed soon,
217 use asus-laptop instead.
220 tristate "IBM ThinkPad Laptop Extras"
222 select BACKLIGHT_CLASS_DEVICE
224 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
225 support for Fn-Fx key combinations, Bluetooth control, video
226 output switching, ThinkLight control, UltraBay eject and more.
227 For more information about this driver see <file:Documentation/ibm-acpi.txt>
228 and <http://ibm-acpi.sf.net/> .
230 If you have an IBM ThinkPad laptop, say Y or M here.
233 bool "Legacy Docking Station Support"
235 depends on ACPI_DOCK=n
238 Allows the ibm_acpi driver to handle docking station events.
239 This support is obsoleted by CONFIG_HOTPLUG_PCI_ACPI. It will
240 allow locking and removing the laptop from the docking station,
241 but will not properly connect PCI devices.
243 If you are not sure, say N here.
246 bool "Legacy Removable Bay Support"
250 Allows the ibm_acpi driver to handle removable bays. It will allow
251 disabling the device in the bay, and also generate notifications when
252 the bay lever is ejected or inserted.
254 If you are not sure, say Y here.
257 tristate "Toshiba Laptop Extras"
259 select BACKLIGHT_CLASS_DEVICE
261 This driver adds support for access to certain system settings
262 on "legacy free" Toshiba laptops. These laptops can be recognized by
263 their lack of a BIOS setup menu and APM support.
265 On these machines, all system configuration is handled through the
266 ACPI. This driver is required for access to controls not covered
267 by the general ACPI drivers, such as LCD brightness, video output,
270 This driver differs from the non-ACPI Toshiba laptop driver (located
271 under "Processor type and features") in several aspects.
272 Configuration is accessed by reading and writing text files in the
273 /proc tree instead of by program interface to /dev. Furthermore, no
274 power management functions are exposed, as those are handled by the
275 general ACPI drivers.
277 More information about this driver is available at
278 <http://memebeam.org/toys/ToshibaAcpiDriver>.
280 If you have a legacy free Toshiba laptop (such as the Libretto L1
283 config ACPI_CUSTOM_DSDT
284 bool "Include Custom DSDT"
285 depends on !STANDALONE
288 This option is to load a custom ACPI DSDT
289 If you don't know what that is, say N.
291 config ACPI_CUSTOM_DSDT_FILE
292 string "Custom DSDT Table file to include"
293 depends on ACPI_CUSTOM_DSDT
296 Enter the full path name to the file which includes the AmlCode
299 config ACPI_BLACKLIST_YEAR
300 int "Disable ACPI for systems before Jan 1st this year" if X86_32
303 enter a 4-digit year, eg. 2001 to disable ACPI by default
304 on platforms with DMI BIOS date before January 1st that year.
305 "acpi=force" can be used to override this mechanism.
307 Enter 0 to disable this mechanism and allow ACPI to
308 run by default no matter what the year. (default)
311 bool "Debug Statements"
314 The ACPI driver can optionally report errors with a great deal
315 of verbosity. Saying Y enables these statements. This will increase
316 your kernel size by around 50K.
322 This driver is required on some systems for the proper operation of
323 the battery and thermal drivers. If you are compiling for a
324 mobile system, say Y.
334 This driver will enable your system to shut down using ACPI, and
335 dump your ACPI DSDT table using /proc/acpi/dsdt.
338 bool "Power Management Timer Support" if EMBEDDED
342 The Power Management Timer is available on all ACPI-capable,
343 in most cases even if ACPI is unusable or blacklisted.
345 This timing source is not affected by power management features
346 like aggressive processor idling, throttling, frequency and/or
347 voltage scaling, unlike the commonly used Time Stamp Counter
350 You should nearly always say Y here because many modern
351 systems require this timer.
353 config ACPI_CONTAINER
354 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
355 depends on EXPERIMENTAL
356 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
358 This allows _physical_ insertion and removal of CPUs and memory.
359 This can be useful, for example, on NUMA machines that support
360 ACPI based physical hotplug of nodes, or non-NUMA machines that
361 support physical cpu/memory hot-plug.
363 If one selects "m", this driver can be loaded with
364 "modprobe acpi_container".
366 config ACPI_HOTPLUG_MEMORY
367 tristate "Memory Hotplug"
369 depends on MEMORY_HOTPLUG
372 This driver adds supports for ACPI Memory Hotplug. This driver
373 provides support for fielding notifications on ACPI memory
374 devices (PNP0C80) which represent memory ranges that may be
375 onlined or offlined during runtime.
377 Enabling this driver assumes that your platform hardware
378 and firmware have support for hot-plugging physical memory. If
379 your system does not support physically adding or ripping out
380 memory DIMMs at some platform defined granularity (individually
381 or as a bank) at runtime, then you need not enable this driver.
383 If one selects "m," this driver can be loaded using the following
385 $>modprobe acpi_memhotplug
388 tristate "Smart Battery System (EXPERIMENTAL)"
389 depends on X86 && I2C
390 depends on EXPERIMENTAL
392 This driver adds support for the Smart Battery System.
393 Depends on I2C (Device Drivers ---> I2C support)
394 A "Smart Battery" is quite old and quite rare compared
395 to today's ACPI "Control Method" battery.