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