5 menu "ACPI (Advanced Configuration and Power Interface) Support"
7 depends on !IA64_HP_SIM
12 depends on IA64 || X86
16 Advanced Configuration and Power Interface (ACPI) support for
17 Linux requires an ACPI compliant platform (hardware/firmware),
18 and assumes the presence of OS-directed configuration and power
19 management (OSPM) software. This option will enlarge your
22 Linux ACPI provides a robust functional replacement for several
23 legacy configuration and power management intefaces, including
24 the Plug-and-Play BIOS specification (PnP BIOS), the
25 MultiProcessor Specification (MPS), and the Advanced Power
26 Management (APM) specification. If both ACPI and APM support
27 are configured, whichever is loaded first shall be used.
29 The ACPI SourceForge project contains the latest source code,
30 documentation, tools, mailing list subscription, and other
31 information. This project is available at:
32 <http://sourceforge.net/projects/acpi>
34 Linux support for ACPI is based on Intel Corporation's ACPI
35 Component Architecture (ACPI CA). For more information see:
36 <http://developer.intel.com/technology/iapc/acpi>
38 ACPI is an open industry specification co-developed by Compaq,
39 Intel, Microsoft, Phoenix, and Toshiba. The specification is
41 <http://www.acpi.info>
45 depends on ACPI || X86_HT
48 config ACPI_INTERPRETER
51 depends on !IA64_SGI_SN
55 bool "Sleep States (EXPERIMENTAL)"
56 depends on X86 && ACPI
57 depends on ACPI_INTERPRETER
58 depends on EXPERIMENTAL && PM
61 This option adds support for ACPI suspend states.
63 With this option, you will be able to put the system "to sleep".
64 Sleep states are low power states for the system and devices. All
65 of the system operating state is saved to either memory or disk
66 (depending on the state), to allow the system to resume operation
67 quickly at your request.
69 Although this option sounds really nifty, barely any of the device
70 drivers have been converted to the new driver model and hence few
71 have proper power management support.
73 This option is not recommended for anyone except those doing driver
74 power management development.
76 config ACPI_SLEEP_PROC_FS
78 depends on ACPI_SLEEP && PROC_FS
84 depends on ACPI_INTERPRETER
87 This driver adds support for the AC Adapter object, which indicates
88 whether a system is on AC, or not. Typically, only mobile systems
89 have this object, since desktops are always on AC.
94 depends on ACPI_INTERPRETER
97 This driver adds support for battery information through
98 /proc/acpi/battery. If you have a mobile system with a battery,
103 depends on ACPI_INTERPRETER
104 depends on !IA64_SGI_SN
107 This driver registers for events based on buttons, such as the
108 power, sleep, and lid switch. In the future, a daemon will read
109 /proc/acpi/event and perform user-defined actions such as shutting
110 down the system. Until then, you can cat it, and see output when
115 depends on ACPI_INTERPRETER
116 depends on !IA64_SGI_SN
119 This driver adds support for ACPI fan devices, allowing user-mode
120 applications to perform basic fan control (on, off, status).
122 config ACPI_PROCESSOR
124 depends on ACPI_INTERPRETER
125 depends on !IA64_SGI_SN
128 This driver installs ACPI as the idle handler for Linux, and uses
129 ACPI C2 and C3 processor states to save power, on systems that
133 tristate "Thermal Zone"
134 depends on ACPI_PROCESSOR
137 This driver adds support for ACPI thermal zones. Most mobile and
138 some desktop systems support ACPI thermal zones. It is HIGHLY
139 recommended that this option be enabled, as your processor(s)
140 may be damaged without it.
144 depends on ACPI_INTERPRETER
147 default y if IA64_GENERIC || IA64_SGI_SN2
150 tristate "ASUS/Medion Laptop Extras"
152 depends on ACPI_INTERPRETER
155 This driver provides support for extra features of ACPI-compatible
156 ASUS laptops. As some of Medion laptops are made by ASUS, it may also
157 support some Medion laptops (such as 9675 for example). It makes all
158 the extra buttons generate standard ACPI events that go through
159 /proc/acpi/events, and (on some models) adds support for changing the
160 display brightness and output, switching the LCD backlight on and off,
161 and most importantly, allows you to blink those fancy LEDs intended
162 for reporting mail and wireless status.
164 Note: display switching code is currently considered EXPERIMENTAL,
165 toying with these values may even lock your machine.
167 All settings are changed via /proc/acpi/asus directory entries. Owner
168 and group for these entries can be set with asus_uid and asus_gid
171 More information and a userspace daemon for handling the extra buttons
172 at <http://sourceforge.net/projects/acpi4asus/>.
174 If you have an ACPI-compatible ASUS laptop, say Y or M here. This
175 driver is still under development, so if your laptop is unsupported or
176 something works not quite as expected, please use the mailing list
177 available on the above page (acpi4asus-user@lists.sourceforge.net)
180 tristate "Toshiba Laptop Extras"
182 depends on ACPI_INTERPRETER
185 This driver adds support for access to certain system settings
186 on "legacy free" Toshiba laptops. These laptops can be recognized by
187 their lack of a BIOS setup menu and APM support.
189 On these machines, all system configuration is handled through the
190 ACPI. This driver is required for access to controls not covered
191 by the general ACPI drivers, such as LCD brightness, video output,
194 This driver differs from the non-ACPI Toshiba laptop driver (located
195 under "Processor type and features") in several aspects.
196 Configuration is accessed by reading and writing text files in the
197 /proc tree instead of by program interface to /dev. Furthermore, no
198 power management functions are exposed, as those are handled by the
199 general ACPI drivers.
201 More information about this driver is available at
202 <http://memebeam.org/toys/ToshibaAcpiDriver>.
204 If you have a legacy free Toshiba laptop (such as the Libretto L1
207 config ACPI_CUSTOM_DSDT
208 bool "Include Custom DSDT"
209 depends on X86 && ACPI_INTERPRETER && !STANDALONE
212 Thist option is to load a custom ACPI DSDT
213 If you don't know what that is, say N.
215 config ACPI_CUSTOM_DSDT_FILE
216 string "Custom DSDT Table file to include"
217 depends on ACPI_CUSTOM_DSDT
220 Enter the full path name to the file wich includes the AmlCode declaration.
222 config ACPI_BLACKLIST_YEAR
223 int "Disable ACPI for systems before Jan 1st this year"
226 enter a 4-digit year, eg. 2001 to disable ACPI by default
227 on platforms with DMI BIOS date before January 1st that year.
228 "acpi=force" can be used to override this mechanism.
230 Enter 0 to disable this mechanism and allow ACPI to
231 run by default no matter what the year. (default)
234 bool "Debug Statements"
235 depends on ACPI_INTERPRETER
236 depends on !IA64_SGI_SN
239 The ACPI driver can optionally report errors with a great deal
240 of verbosity. Saying Y enables these statements. This will increase
241 your kernel size by around 50K.
245 depends on ACPI_INTERPRETER
246 depends on !IA64_SGI_SN
252 depends on ACPI_INTERPRETER
255 This driver is required on some systems for the proper operation of
256 the battery and thermal drivers. If you are compiling for a
257 mobile system, say Y.
261 depends on ACPI_INTERPRETER
262 depends on !IA64_SGI_SN
267 depends on ACPI_INTERPRETER
268 depends on !IA64_SGI_SN
273 depends on ACPI_INTERPRETER
274 depends on !IA64_SGI_SN
277 This driver will enable your system to shut down using ACPI, and
278 dump your ACPI DSDT table using /proc/acpi/dsdt.
281 bool "Power Management Timer Support"
282 depends on X86 && ACPI
283 depends on ACPI_BOOT && EXPERIMENTAL
287 The Power Management Timer is available on all ACPI-capable,
288 in most cases even if ACPI is unusable or blacklisted.
290 This timing source is not affected by powermanagement features
291 like aggressive processor idling, throttling, frequency and/or
292 voltage scaling, unlike the commonly used Time Stamp Counter
295 So, if you see messages like 'Losing too many ticks!' in the
296 kernel logs, and/or you are using this on a notebook which
297 does not yet have an HPET, you should say "Y" here.