5 menu "ACPI (Advanced Configuration and Power Interface) Support"
8 depends on !IA64_HP_SIM
13 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>
47 bool "Sleep States (EXPERIMENTAL)"
48 depends on X86 && (!SMP || SUSPEND_SMP)
49 depends on EXPERIMENTAL && PM
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
85 This driver adds support for the AC Adapter object, which indicates
86 whether a system is on AC, or not. Typically, only mobile systems
87 have this object, since desktops are always on AC.
94 This driver adds support for battery information through
95 /proc/acpi/battery. If you have a mobile system with a battery,
102 This driver registers for events based on buttons, such as the
103 power, sleep, and lid switch. In the future, a daemon will read
104 /proc/acpi/event and perform user-defined actions such as shutting
105 down the system. Until then, you can cat it, and see output when
110 depends on EXPERIMENTAL
113 This driver implement the ACPI Extensions For Display Adapters
114 for integrated graphics devices on motherboard, as specified in
115 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
116 control like defining the video POST device, retrieving EDID information
117 or to setup a video output, etc.
118 Note that this is an ref. implementation only. It may or may not work
119 for your integrated video device.
122 tristate "Generic Hotkey"
123 depends on EXPERIMENTAL
124 depends on !IA64_SGI_SN
127 Experimental consolidated hotkey driver.
128 If you are unsure, say N.
134 This driver adds support for ACPI fan devices, allowing user-mode
135 applications to perform basic fan control (on, off, status).
137 config ACPI_PROCESSOR
141 This driver installs ACPI as the idle handler for Linux, and uses
142 ACPI C2 and C3 processor states to save power, on systems that
145 config ACPI_HOTPLUG_CPU
147 depends on ACPI_PROCESSOR && HOTPLUG_CPU
148 select ACPI_CONTAINER
152 tristate "Thermal Zone"
153 depends on ACPI_PROCESSOR
156 This driver adds support for ACPI thermal zones. Most mobile and
157 some desktop systems support ACPI thermal zones. It is HIGHLY
158 recommended that this option be enabled, as your processor(s)
159 may be damaged without it.
164 depends on (IA64 || X86_64)
165 default y if IA64_GENERIC || IA64_SGI_SN2
168 tristate "ASUS/Medion Laptop Extras"
172 This driver provides support for extra features of ACPI-compatible
173 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
174 support some Medion laptops (such as 9675 for example). It makes all
175 the extra buttons generate standard ACPI events that go through
176 /proc/acpi/events, and (on some models) adds support for changing the
177 display brightness and output, switching the LCD backlight on and off,
178 and most importantly, allows you to blink those fancy LEDs intended
179 for reporting mail and wireless status.
181 Note: display switching code is currently considered EXPERIMENTAL,
182 toying with these values may even lock your machine.
184 All settings are changed via /proc/acpi/asus directory entries. Owner
185 and group for these entries can be set with asus_uid and asus_gid
188 More information and a userspace daemon for handling the extra buttons
189 at <http://sourceforge.net/projects/acpi4asus/>.
191 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
192 driver is still under development, so if your laptop is unsupported or
193 something works not quite as expected, please use the mailing list
194 available on the above page (acpi4asus-user@lists.sourceforge.net)
197 tristate "IBM ThinkPad Laptop Extras"
201 This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
202 support for Fn-Fx key combinations, Bluetooth control, video
203 output switching, ThinkLight control, UltraBay eject and more.
204 For more information about this driver see <file:Documentation/ibm-acpi.txt>
205 and <http://ibm-acpi.sf.net/> .
207 If you have an IBM ThinkPad laptop, say Y or M here.
210 tristate "Toshiba Laptop Extras"
214 This driver adds support for access to certain system settings
215 on "legacy free" Toshiba laptops. These laptops can be recognized by
216 their lack of a BIOS setup menu and APM support.
218 On these machines, all system configuration is handled through the
219 ACPI. This driver is required for access to controls not covered
220 by the general ACPI drivers, such as LCD brightness, video output,
223 This driver differs from the non-ACPI Toshiba laptop driver (located
224 under "Processor type and features") in several aspects.
225 Configuration is accessed by reading and writing text files in the
226 /proc tree instead of by program interface to /dev. Furthermore, no
227 power management functions are exposed, as those are handled by the
228 general ACPI drivers.
230 More information about this driver is available at
231 <http://memebeam.org/toys/ToshibaAcpiDriver>.
233 If you have a legacy free Toshiba laptop (such as the Libretto L1
236 config ACPI_CUSTOM_DSDT
237 bool "Include Custom DSDT"
238 depends on !STANDALONE
241 Thist option is to load a custom ACPI DSDT
242 If you don't know what that is, say N.
244 config ACPI_CUSTOM_DSDT_FILE
245 string "Custom DSDT Table file to include"
246 depends on ACPI_CUSTOM_DSDT
249 Enter the full path name to the file wich includes the AmlCode declaration.
251 config ACPI_BLACKLIST_YEAR
252 int "Disable ACPI for systems before Jan 1st this year"
255 enter a 4-digit year, eg. 2001 to disable ACPI by default
256 on platforms with DMI BIOS date before January 1st that year.
257 "acpi=force" can be used to override this mechanism.
259 Enter 0 to disable this mechanism and allow ACPI to
260 run by default no matter what the year. (default)
263 bool "Debug Statements"
266 The ACPI driver can optionally report errors with a great deal
267 of verbosity. Saying Y enables these statements. This will increase
268 your kernel size by around 50K.
279 This driver is required on some systems for the proper operation of
280 the battery and thermal drivers. If you are compiling for a
281 mobile system, say Y.
295 This driver will enable your system to shut down using ACPI, and
296 dump your ACPI DSDT table using /proc/acpi/dsdt.
299 bool "Power Management Timer Support"
301 depends on EXPERIMENTAL
305 The Power Management Timer is available on all ACPI-capable,
306 in most cases even if ACPI is unusable or blacklisted.
308 This timing source is not affected by powermanagement features
309 like aggressive processor idling, throttling, frequency and/or
310 voltage scaling, unlike the commonly used Time Stamp Counter
313 So, if you see messages like 'Losing too many ticks!' in the
314 kernel logs, and/or you are using this on a notebook which
315 does not yet have an HPET, you should say "Y" here.
317 config ACPI_CONTAINER
318 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
319 depends on EXPERIMENTAL
320 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
322 This allows _physical_ insertion and removal of CPUs and memory.
323 This can be useful, for example, on NUMA machines that support
324 ACPI based physical hotplug of nodes, or non-NUMA machines that
325 support physical cpu/memory hot-plug.
327 If one selects "m", this driver can be loaded with
328 "modprobe acpi_container".
330 config ACPI_HOTPLUG_MEMORY
331 tristate "Memory Hotplug"
333 depends on MEMORY_HOTPLUG
336 This driver adds supports for ACPI Memory Hotplug. This driver
337 provides support for fielding notifications on ACPI memory
338 devices (PNP0C80) which represent memory ranges that may be
339 onlined or offlined during runtime.
341 Enabling this driver assumes that your platform hardware
342 and firmware have support for hot-plugging physical memory. If
343 your system does not support physically adding or ripping out
344 memory DIMMs at some platfrom defined granularity (individually
345 or as a bank) at runtime, then you need not enable this driver.
347 If one selects "m," this driver can be loaded using the following
349 $>modprobe acpi_memhotplug