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