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.
137 tristate "Generic Hotkey (EXPERIMENTAL)"
138 depends on EXPERIMENTAL
142 Experimental consolidated hotkey driver.
143 If you are unsure, say N.
149 This driver adds support for ACPI fan devices, allowing user-mode
150 applications to perform basic fan control (on, off, status).
154 depends on EXPERIMENTAL
156 This driver adds support for ACPI controlled docking stations
159 tristate "Removable Drive Bay (EXPERIMENTAL)"
160 depends on EXPERIMENTAL
162 This driver adds support for ACPI controlled removable drive
163 bays such as the IBM ultrabay or the Dell Module Bay.
165 config ACPI_PROCESSOR
169 This driver installs ACPI as the idle handler for Linux, and uses
170 ACPI C2 and C3 processor states to save power, on systems that
171 support it. It is required by several flavors of cpufreq
172 Performance-state drivers.
174 config ACPI_HOTPLUG_CPU
176 depends on ACPI_PROCESSOR && HOTPLUG_CPU
177 select ACPI_CONTAINER
181 tristate "Thermal Zone"
182 depends on ACPI_PROCESSOR
185 This driver adds support for ACPI thermal zones. Most mobile and
186 some desktop systems support ACPI thermal zones. It is HIGHLY
187 recommended that this option be enabled, as your processor(s)
188 may be damaged without it.
193 depends on (X86 || IA64)
194 default y if IA64_GENERIC || IA64_SGI_SN2
197 tristate "ASUS/Medion Laptop Extras"
199 select BACKLIGHT_CLASS_DEVICE
201 This driver provides support for extra features of ACPI-compatible
202 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
203 support some Medion laptops (such as 9675 for example). It makes all
204 the extra buttons generate standard ACPI events that go through
205 /proc/acpi/events, and (on some models) adds support for changing the
206 display brightness and output, switching the LCD backlight on and off,
207 and most importantly, allows you to blink those fancy LEDs intended
208 for reporting mail and wireless status.
210 Note: display switching code is currently considered EXPERIMENTAL,
211 toying with these values may even lock your machine.
213 All settings are changed via /proc/acpi/asus directory entries. Owner
214 and group for these entries can be set with asus_uid and asus_gid
217 More information and a userspace daemon for handling the extra buttons
218 at <http://sourceforge.net/projects/acpi4asus/>.
220 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
221 driver is still under development, so if your laptop is unsupported or
222 something works not quite as expected, please use the mailing list
223 available on the above page (acpi4asus-user@lists.sourceforge.net).
225 NOTE: This driver is deprecated and will probably be removed soon,
226 use asus-laptop instead.
229 tristate "IBM ThinkPad Laptop Extras"
231 select BACKLIGHT_CLASS_DEVICE
233 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
234 support for Fn-Fx key combinations, Bluetooth control, video
235 output switching, ThinkLight control, UltraBay eject and more.
236 For more information about this driver see <file:Documentation/ibm-acpi.txt>
237 and <http://ibm-acpi.sf.net/> .
239 If you have an IBM ThinkPad laptop, say Y or M here.
242 bool "Legacy Docking Station Support"
244 depends on ACPI_DOCK=n
247 Allows the ibm_acpi driver to handle docking station events.
248 This support is obsoleted by CONFIG_HOTPLUG_PCI_ACPI. It will
249 allow locking and removing the laptop from the docking station,
250 but will not properly connect PCI devices.
252 If you are not sure, say N here.
255 tristate "Toshiba Laptop Extras"
257 select BACKLIGHT_CLASS_DEVICE
259 This driver adds support for access to certain system settings
260 on "legacy free" Toshiba laptops. These laptops can be recognized by
261 their lack of a BIOS setup menu and APM support.
263 On these machines, all system configuration is handled through the
264 ACPI. This driver is required for access to controls not covered
265 by the general ACPI drivers, such as LCD brightness, video output,
268 This driver differs from the non-ACPI Toshiba laptop driver (located
269 under "Processor type and features") in several aspects.
270 Configuration is accessed by reading and writing text files in the
271 /proc tree instead of by program interface to /dev. Furthermore, no
272 power management functions are exposed, as those are handled by the
273 general ACPI drivers.
275 More information about this driver is available at
276 <http://memebeam.org/toys/ToshibaAcpiDriver>.
278 If you have a legacy free Toshiba laptop (such as the Libretto L1
281 config ACPI_CUSTOM_DSDT
282 bool "Include Custom DSDT"
283 depends on !STANDALONE
286 This option is to load a custom ACPI DSDT
287 If you don't know what that is, say N.
289 config ACPI_CUSTOM_DSDT_FILE
290 string "Custom DSDT Table file to include"
291 depends on ACPI_CUSTOM_DSDT
294 Enter the full path name to the file which includes the AmlCode
297 config ACPI_BLACKLIST_YEAR
298 int "Disable ACPI for systems before Jan 1st this year" if X86_32
301 enter a 4-digit year, eg. 2001 to disable ACPI by default
302 on platforms with DMI BIOS date before January 1st that year.
303 "acpi=force" can be used to override this mechanism.
305 Enter 0 to disable this mechanism and allow ACPI to
306 run by default no matter what the year. (default)
309 bool "Debug Statements"
312 The ACPI driver can optionally report errors with a great deal
313 of verbosity. Saying Y enables these statements. This will increase
314 your kernel size by around 50K.
320 This driver is required on some systems for the proper operation of
321 the battery and thermal drivers. If you are compiling for a
322 mobile system, say Y.
332 This driver will enable your system to shut down using ACPI, and
333 dump your ACPI DSDT table using /proc/acpi/dsdt.
336 bool "Power Management Timer Support" if EMBEDDED
340 The Power Management Timer is available on all ACPI-capable,
341 in most cases even if ACPI is unusable or blacklisted.
343 This timing source is not affected by power management features
344 like aggressive processor idling, throttling, frequency and/or
345 voltage scaling, unlike the commonly used Time Stamp Counter
348 You should nearly always say Y here because many modern
349 systems require this timer.
351 config ACPI_CONTAINER
352 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
353 depends on EXPERIMENTAL
354 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
356 This allows _physical_ insertion and removal of CPUs and memory.
357 This can be useful, for example, on NUMA machines that support
358 ACPI based physical hotplug of nodes, or non-NUMA machines that
359 support physical cpu/memory hot-plug.
361 If one selects "m", this driver can be loaded with
362 "modprobe acpi_container".
364 config ACPI_HOTPLUG_MEMORY
365 tristate "Memory Hotplug"
367 depends on MEMORY_HOTPLUG
370 This driver adds supports for ACPI Memory Hotplug. This driver
371 provides support for fielding notifications on ACPI memory
372 devices (PNP0C80) which represent memory ranges that may be
373 onlined or offlined during runtime.
375 Enabling this driver assumes that your platform hardware
376 and firmware have support for hot-plugging physical memory. If
377 your system does not support physically adding or ripping out
378 memory DIMMs at some platform defined granularity (individually
379 or as a bank) at runtime, then you need not enable this driver.
381 If one selects "m," this driver can be loaded using the following
383 $>modprobe acpi_memhotplug
386 tristate "Smart Battery System (EXPERIMENTAL)"
387 depends on X86 && I2C
388 depends on EXPERIMENTAL
390 This driver adds support for the Smart Battery System.
391 Depends on I2C (Device Drivers ---> I2C support)
392 A "Smart Battery" is quite old and quite rare compared
393 to today's ACPI "Control Method" battery.