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
85 This driver adds support for the AC Adapter object, which indicates
86 whether a system is on AC, or not. If you have a system that can
87 switch between A/C and battery, say Y.
94 This driver adds support for battery information through
95 /proc/acpi/battery. If you have a mobile system with a battery,
103 This driver handles events on the power, sleep and lid buttons.
104 A daemon reads /proc/acpi/event and perform user-defined actions
105 such as shutting down the system. This is necessary for
106 software controlled poweroff.
112 This driver implement the ACPI Extensions For Display Adapters
113 for integrated graphics devices on motherboard, as specified in
114 ACPI 2.0 Specification, Appendix B, allowing to perform some basic
115 control like defining the video POST device, retrieving EDID information
116 or to setup a video output, etc.
117 Note that this is an ref. implementation only. It may or may not work
118 for your integrated video device.
121 tristate "Generic Hotkey (EXPERIMENTAL)"
122 depends on EXPERIMENTAL
126 Experimental consolidated hotkey driver.
127 If you are unsure, say N.
133 This driver adds support for ACPI fan devices, allowing user-mode
134 applications to perform basic fan control (on, off, status).
138 depends on EXPERIMENTAL
140 This driver adds support for ACPI controlled docking stations
142 config ACPI_PROCESSOR
146 This driver installs ACPI as the idle handler for Linux, and uses
147 ACPI C2 and C3 processor states to save power, on systems that
148 support it. It is required by several flavors of cpufreq
149 Performance-state drivers.
151 config ACPI_HOTPLUG_CPU
153 depends on ACPI_PROCESSOR && HOTPLUG_CPU
154 select ACPI_CONTAINER
158 tristate "Thermal Zone"
159 depends on ACPI_PROCESSOR
162 This driver adds support for ACPI thermal zones. Most mobile and
163 some desktop systems support ACPI thermal zones. It is HIGHLY
164 recommended that this option be enabled, as your processor(s)
165 may be damaged without it.
170 depends on (X86 || IA64)
171 default y if IA64_GENERIC || IA64_SGI_SN2
174 tristate "ASUS/Medion Laptop Extras"
176 select BACKLIGHT_CLASS_DEVICE
178 This driver provides support for extra features of ACPI-compatible
179 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
180 support some Medion laptops (such as 9675 for example). It makes all
181 the extra buttons generate standard ACPI events that go through
182 /proc/acpi/events, and (on some models) adds support for changing the
183 display brightness and output, switching the LCD backlight on and off,
184 and most importantly, allows you to blink those fancy LEDs intended
185 for reporting mail and wireless status.
187 Note: display switching code is currently considered EXPERIMENTAL,
188 toying with these values may even lock your machine.
190 All settings are changed via /proc/acpi/asus directory entries. Owner
191 and group for these entries can be set with asus_uid and asus_gid
194 More information and a userspace daemon for handling the extra buttons
195 at <http://sourceforge.net/projects/acpi4asus/>.
197 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
198 driver is still under development, so if your laptop is unsupported or
199 something works not quite as expected, please use the mailing list
200 available on the above page (acpi4asus-user@lists.sourceforge.net)
203 tristate "Toshiba Laptop Extras"
205 select BACKLIGHT_CLASS_DEVICE
207 This driver adds support for access to certain system settings
208 on "legacy free" Toshiba laptops. These laptops can be recognized by
209 their lack of a BIOS setup menu and APM support.
211 On these machines, all system configuration is handled through the
212 ACPI. This driver is required for access to controls not covered
213 by the general ACPI drivers, such as LCD brightness, video output,
216 This driver differs from the non-ACPI Toshiba laptop driver (located
217 under "Processor type and features") in several aspects.
218 Configuration is accessed by reading and writing text files in the
219 /proc tree instead of by program interface to /dev. Furthermore, no
220 power management functions are exposed, as those are handled by the
221 general ACPI drivers.
223 More information about this driver is available at
224 <http://memebeam.org/toys/ToshibaAcpiDriver>.
226 If you have a legacy free Toshiba laptop (such as the Libretto L1
229 config ACPI_CUSTOM_DSDT
230 bool "Include Custom DSDT"
231 depends on !STANDALONE
234 This option is to load a custom ACPI DSDT
235 If you don't know what that is, say N.
237 config ACPI_CUSTOM_DSDT_FILE
238 string "Custom DSDT Table file to include"
239 depends on ACPI_CUSTOM_DSDT
242 Enter the full path name to the file which includes the AmlCode
245 config ACPI_BLACKLIST_YEAR
246 int "Disable ACPI for systems before Jan 1st this year" if X86_32
249 enter a 4-digit year, eg. 2001 to disable ACPI by default
250 on platforms with DMI BIOS date before January 1st that year.
251 "acpi=force" can be used to override this mechanism.
253 Enter 0 to disable this mechanism and allow ACPI to
254 run by default no matter what the year. (default)
257 bool "Debug Statements"
260 The ACPI driver can optionally report errors with a great deal
261 of verbosity. Saying Y enables these statements. This will increase
262 your kernel size by around 50K.
268 This driver is required on some systems for the proper operation of
269 the battery and thermal drivers. If you are compiling for a
270 mobile system, say Y.
280 This driver will enable your system to shut down using ACPI, and
281 dump your ACPI DSDT table using /proc/acpi/dsdt.
284 bool "Power Management Timer Support" if EMBEDDED
288 The Power Management Timer is available on all ACPI-capable,
289 in most cases even if ACPI is unusable or blacklisted.
291 This timing source is not affected by power management features
292 like aggressive processor idling, throttling, frequency and/or
293 voltage scaling, unlike the commonly used Time Stamp Counter
296 You should nearly always say Y here because many modern
297 systems require this timer.
299 config ACPI_CONTAINER
300 tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
301 depends on EXPERIMENTAL
302 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
304 This allows _physical_ insertion and removal of CPUs and memory.
305 This can be useful, for example, on NUMA machines that support
306 ACPI based physical hotplug of nodes, or non-NUMA machines that
307 support physical cpu/memory hot-plug.
309 If one selects "m", this driver can be loaded with
310 "modprobe acpi_container".
312 config ACPI_HOTPLUG_MEMORY
313 tristate "Memory Hotplug"
315 depends on MEMORY_HOTPLUG
318 This driver adds supports for ACPI Memory Hotplug. This driver
319 provides support for fielding notifications on ACPI memory
320 devices (PNP0C80) which represent memory ranges that may be
321 onlined or offlined during runtime.
323 Enabling this driver assumes that your platform hardware
324 and firmware have support for hot-plugging physical memory. If
325 your system does not support physically adding or ripping out
326 memory DIMMs at some platform defined granularity (individually
327 or as a bank) at runtime, then you need not enable this driver.
329 If one selects "m," this driver can be loaded using the following
331 $>modprobe acpi_memhotplug
334 tristate "Smart Battery System (EXPERIMENTAL)"
335 depends on X86 && I2C
336 depends on EXPERIMENTAL
338 This driver adds support for the Smart Battery System.
339 Depends on I2C (Device Drivers ---> I2C support)
340 A "Smart Battery" is quite old and quite rare compared
341 to today's ACPI "Control Method" battery.