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diff --git a/Documentation/ibm-acpi.txt b/Documentation/ibm-acpi.txt deleted file mode 100644 index 0132d363feb5..000000000000 --- a/Documentation/ibm-acpi.txt +++ /dev/null @@ -1,728 +0,0 @@ - IBM ThinkPad ACPI Extras Driver - - Version 0.12 - 17 August 2005 - - Borislav Deianov <borislav@users.sf.net> - http://ibm-acpi.sf.net/ - - -This is a Linux ACPI driver for the IBM ThinkPad laptops. It supports -various features of these laptops which are accessible through the -ACPI framework but not otherwise supported by the generic Linux ACPI -drivers. - - -Status ------- - -The features currently supported are the following (see below for -detailed description): - - - Fn key combinations - - Bluetooth enable and disable - - video output switching, expansion control - - ThinkLight on and off - - limited docking and undocking - - UltraBay eject - - CMOS control - - LED control - - ACPI sounds - - temperature sensors - - Experimental: embedded controller register dump - - LCD brightness control - - Volume control - - Experimental: fan speed, fan enable/disable - - Experimental: WAN enable and disable - -A compatibility table by model and feature is maintained on the web -site, http://ibm-acpi.sf.net/. I appreciate any success or failure -reports, especially if they add to or correct the compatibility table. -Please include the following information in your report: - - - ThinkPad model name - - a copy of your DSDT, from /proc/acpi/dsdt - - which driver features work and which don't - - the observed behavior of non-working features - -Any other comments or patches are also more than welcome. - - -Installation ------------- - -If you are compiling this driver as included in the Linux kernel -sources, simply enable the CONFIG_ACPI_IBM option (Power Management / -ACPI / IBM ThinkPad Laptop Extras). - -Features --------- - -The driver creates the /proc/acpi/ibm directory. There is a file under -that directory for each feature described below. Note that while the -driver is still in the alpha stage, the exact proc file format and -commands supported by the various features is guaranteed to change -frequently. - -Driver version -- /proc/acpi/ibm/driver ---------------------------------------- - -The driver name and version. No commands can be written to this file. - -Hot keys -- /proc/acpi/ibm/hotkey ---------------------------------- - -Without this driver, only the Fn-F4 key (sleep button) generates an -ACPI event. With the driver loaded, the hotkey feature enabled and the -mask set (see below), the various hot keys generate ACPI events in the -following format: - - ibm/hotkey HKEY 00000080 0000xxxx - -The last four digits vary depending on the key combination pressed. -All labeled Fn-Fx key combinations generate distinct events. In -addition, the lid microswitch and some docking station buttons may -also generate such events. - -The following commands can be written to this file: - - echo enable > /proc/acpi/ibm/hotkey -- enable the hot keys feature - echo disable > /proc/acpi/ibm/hotkey -- disable the hot keys feature - echo 0xffff > /proc/acpi/ibm/hotkey -- enable all possible hot keys - echo 0x0000 > /proc/acpi/ibm/hotkey -- disable all possible hot keys - ... any other 4-hex-digit mask ... - echo reset > /proc/acpi/ibm/hotkey -- restore the original mask - -The bit mask allows some control over which hot keys generate ACPI -events. Not all bits in the mask can be modified. Not all bits that -can be modified do anything. Not all hot keys can be individually -controlled by the mask. Most recent ThinkPad models honor the -following bits (assuming the hot keys feature has been enabled): - - key bit behavior when set behavior when unset - - Fn-F3 always generates ACPI event - Fn-F4 always generates ACPI event - Fn-F5 0010 generate ACPI event enable/disable Bluetooth - Fn-F7 0040 generate ACPI event switch LCD and external display - Fn-F8 0080 generate ACPI event expand screen or none - Fn-F9 0100 generate ACPI event none - Fn-F12 always generates ACPI event - -Some models do not support all of the above. For example, the T30 does -not support Fn-F5 and Fn-F9. Other models do not support the mask at -all. On those models, hot keys cannot be controlled individually. - -Note that enabling ACPI events for some keys prevents their default -behavior. For example, if events for Fn-F5 are enabled, that key will -no longer enable/disable Bluetooth by itself. This can still be done -from an acpid handler for the ibm/hotkey event. - -Note also that not all Fn key combinations are supported through -ACPI. For example, on the X40, the brightness, volume and "Access IBM" -buttons do not generate ACPI events even with this driver. They *can* -be used through the "ThinkPad Buttons" utility, see -http://www.nongnu.org/tpb/ - -Bluetooth -- /proc/acpi/ibm/bluetooth -------------------------------------- - -This feature shows the presence and current state of a Bluetooth -device. If Bluetooth is installed, the following commands can be used: - - echo enable > /proc/acpi/ibm/bluetooth - echo disable > /proc/acpi/ibm/bluetooth - -Video output control -- /proc/acpi/ibm/video --------------------------------------------- - -This feature allows control over the devices used for video output - -LCD, CRT or DVI (if available). The following commands are available: - - echo lcd_enable > /proc/acpi/ibm/video - echo lcd_disable > /proc/acpi/ibm/video - echo crt_enable > /proc/acpi/ibm/video - echo crt_disable > /proc/acpi/ibm/video - echo dvi_enable > /proc/acpi/ibm/video - echo dvi_disable > /proc/acpi/ibm/video - echo auto_enable > /proc/acpi/ibm/video - echo auto_disable > /proc/acpi/ibm/video - echo expand_toggle > /proc/acpi/ibm/video - echo video_switch > /proc/acpi/ibm/video - -Each video output device can be enabled or disabled individually. -Reading /proc/acpi/ibm/video shows the status of each device. - -Automatic video switching can be enabled or disabled. When automatic -video switching is enabled, certain events (e.g. opening the lid, -docking or undocking) cause the video output device to change -automatically. While this can be useful, it also causes flickering -and, on the X40, video corruption. By disabling automatic switching, -the flickering or video corruption can be avoided. - -The video_switch command cycles through the available video outputs -(it simulates the behavior of Fn-F7). - -Video expansion can be toggled through this feature. This controls -whether the display is expanded to fill the entire LCD screen when a -mode with less than full resolution is used. Note that the current -video expansion status cannot be determined through this feature. - -Note that on many models (particularly those using Radeon graphics -chips) the X driver configures the video card in a way which prevents -Fn-F7 from working. This also disables the video output switching -features of this driver, as it uses the same ACPI methods as -Fn-F7. Video switching on the console should still work. - -UPDATE: There's now a patch for the X.org Radeon driver which -addresses this issue. Some people are reporting success with the patch -while others are still having problems. For more information: - -https://bugs.freedesktop.org/show_bug.cgi?id=2000 - -ThinkLight control -- /proc/acpi/ibm/light ------------------------------------------- - -The current status of the ThinkLight can be found in this file. A few -models which do not make the status available will show it as -"unknown". The available commands are: - - echo on > /proc/acpi/ibm/light - echo off > /proc/acpi/ibm/light - -Docking / undocking -- /proc/acpi/ibm/dock ------------------------------------------- - -Docking and undocking (e.g. with the X4 UltraBase) requires some -actions to be taken by the operating system to safely make or break -the electrical connections with the dock. - -The docking feature of this driver generates the following ACPI events: - - ibm/dock GDCK 00000003 00000001 -- eject request - ibm/dock GDCK 00000003 00000002 -- undocked - ibm/dock GDCK 00000000 00000003 -- docked - -NOTE: These events will only be generated if the laptop was docked -when originally booted. This is due to the current lack of support for -hot plugging of devices in the Linux ACPI framework. If the laptop was -booted while not in the dock, the following message is shown in the -logs: - - Mar 17 01:42:34 aero kernel: ibm_acpi: dock device not present - -In this case, no dock-related events are generated but the dock and -undock commands described below still work. They can be executed -manually or triggered by Fn key combinations (see the example acpid -configuration files included in the driver tarball package available -on the web site). - -When the eject request button on the dock is pressed, the first event -above is generated. The handler for this event should issue the -following command: - - echo undock > /proc/acpi/ibm/dock - -After the LED on the dock goes off, it is safe to eject the laptop. -Note: if you pressed this key by mistake, go ahead and eject the -laptop, then dock it back in. Otherwise, the dock may not function as -expected. - -When the laptop is docked, the third event above is generated. The -handler for this event should issue the following command to fully -enable the dock: - - echo dock > /proc/acpi/ibm/dock - -The contents of the /proc/acpi/ibm/dock file shows the current status -of the dock, as provided by the ACPI framework. - -The docking support in this driver does not take care of enabling or -disabling any other devices you may have attached to the dock. For -example, a CD drive plugged into the UltraBase needs to be disabled or -enabled separately. See the provided example acpid configuration files -for how this can be accomplished. - -There is no support yet for PCI devices that may be attached to a -docking station, e.g. in the ThinkPad Dock II. The driver currently -does not recognize, enable or disable such devices. This means that -the only docking stations currently supported are the X-series -UltraBase docks and "dumb" port replicators like the Mini Dock (the -latter don't need any ACPI support, actually). - -UltraBay eject -- /proc/acpi/ibm/bay ------------------------------------- - -Inserting or ejecting an UltraBay device requires some actions to be -taken by the operating system to safely make or break the electrical -connections with the device. - -This feature generates the following ACPI events: - - ibm/bay MSTR 00000003 00000000 -- eject request - ibm/bay MSTR 00000001 00000000 -- eject lever inserted - -NOTE: These events will only be generated if the UltraBay was present -when the laptop was originally booted (on the X series, the UltraBay -is in the dock, so it may not be present if the laptop was undocked). -This is due to the current lack of support for hot plugging of devices -in the Linux ACPI framework. If the laptop was booted without the -UltraBay, the following message is shown in the logs: - - Mar 17 01:42:34 aero kernel: ibm_acpi: bay device not present - -In this case, no bay-related events are generated but the eject -command described below still works. It can be executed manually or -triggered by a hot key combination. - -Sliding the eject lever generates the first event shown above. The -handler for this event should take whatever actions are necessary to -shut down the device in the UltraBay (e.g. call idectl), then issue -the following command: - - echo eject > /proc/acpi/ibm/bay - -After the LED on the UltraBay goes off, it is safe to pull out the -device. - -When the eject lever is inserted, the second event above is -generated. The handler for this event should take whatever actions are -necessary to enable the UltraBay device (e.g. call idectl). - -The contents of the /proc/acpi/ibm/bay file shows the current status -of the UltraBay, as provided by the ACPI framework. - -EXPERIMENTAL warm eject support on the 600e/x, A22p and A3x (To use -this feature, you need to supply the experimental=1 parameter when -loading the module): - -These models do not have a button near the UltraBay device to request -a hot eject but rather require the laptop to be put to sleep -(suspend-to-ram) before the bay device is ejected or inserted). -The sequence of steps to eject the device is as follows: - - echo eject > /proc/acpi/ibm/bay - put the ThinkPad to sleep - remove the drive - resume from sleep - cat /proc/acpi/ibm/bay should show that the drive was removed - -On the A3x, both the UltraBay 2000 and UltraBay Plus devices are -supported. Use "eject2" instead of "eject" for the second bay. - -Note: the UltraBay eject support on the 600e/x, A22p and A3x is -EXPERIMENTAL and may not work as expected. USE WITH CAUTION! - -CMOS control -- /proc/acpi/ibm/cmos ------------------------------------ - -This feature is used internally by the ACPI firmware to control the -ThinkLight on most newer ThinkPad models. It may also control LCD -brightness, sounds volume and more, but only on some models. - -The commands are non-negative integer numbers: - - echo 0 >/proc/acpi/ibm/cmos - echo 1 >/proc/acpi/ibm/cmos - echo 2 >/proc/acpi/ibm/cmos - ... - -The range of valid numbers is 0 to 21, but not all have an effect and -the behavior varies from model to model. Here is the behavior on the -X40 (tpb is the ThinkPad Buttons utility): - - 0 - no effect but tpb reports "Volume down" - 1 - no effect but tpb reports "Volume up" - 2 - no effect but tpb reports "Mute on" - 3 - simulate pressing the "Access IBM" button - 4 - LCD brightness up - 5 - LCD brightness down - 11 - toggle screen expansion - 12 - ThinkLight on - 13 - ThinkLight off - 14 - no effect but tpb reports ThinkLight status change - -LED control -- /proc/acpi/ibm/led ---------------------------------- - -Some of the LED indicators can be controlled through this feature. The -available commands are: - - echo '<led number> on' >/proc/acpi/ibm/led - echo '<led number> off' >/proc/acpi/ibm/led - echo '<led number> blink' >/proc/acpi/ibm/led - -The <led number> range is 0 to 7. The set of LEDs that can be -controlled varies from model to model. Here is the mapping on the X40: - - 0 - power - 1 - battery (orange) - 2 - battery (green) - 3 - UltraBase - 4 - UltraBay - 7 - standby - -All of the above can be turned on and off and can be made to blink. - -ACPI sounds -- /proc/acpi/ibm/beep ----------------------------------- - -The BEEP method is used internally by the ACPI firmware to provide -audible alerts in various situations. This feature allows the same -sounds to be triggered manually. - -The commands are non-negative integer numbers: - - echo <number> >/proc/acpi/ibm/beep - -The valid <number> range is 0 to 17. Not all numbers trigger sounds -and the sounds vary from model to model. Here is the behavior on the -X40: - - 0 - stop a sound in progress (but use 17 to stop 16) - 2 - two beeps, pause, third beep ("low battery") - 3 - single beep - 4 - high, followed by low-pitched beep ("unable") - 5 - single beep - 6 - very high, followed by high-pitched beep ("AC/DC") - 7 - high-pitched beep - 9 - three short beeps - 10 - very long beep - 12 - low-pitched beep - 15 - three high-pitched beeps repeating constantly, stop with 0 - 16 - one medium-pitched beep repeating constantly, stop with 17 - 17 - stop 16 - -Temperature sensors -- /proc/acpi/ibm/thermal ---------------------------------------------- - -Most ThinkPads include six or more separate temperature sensors but -only expose the CPU temperature through the standard ACPI methods. -This feature shows readings from up to eight different sensors on older -ThinkPads, and it has experimental support for up to sixteen different -sensors on newer ThinkPads. Readings from sensors that are not available -return -128. - -No commands can be written to this file. - -EXPERIMENTAL: The 16-sensors feature is marked EXPERIMENTAL because the -implementation directly accesses hardware registers and may not work as -expected. USE WITH CAUTION! To use this feature, you need to supply the -experimental=1 parameter when loading the module. When EXPERIMENTAL -mode is enabled, reading the first 8 sensors on newer ThinkPads will -also use an new experimental thermal sensor access mode. - -For example, on the X40, a typical output may be: -temperatures: 42 42 45 41 36 -128 33 -128 - -EXPERIMENTAL: On the T43/p, a typical output may be: -temperatures: 48 48 36 52 38 -128 31 -128 48 52 48 -128 -128 -128 -128 -128 - -The mapping of thermal sensors to physical locations varies depending on -system-board model (and thus, on ThinkPad model). - -http://thinkwiki.org/wiki/Thermal_Sensors is a public wiki page that -tries to track down these locations for various models. - -Most (newer?) models seem to follow this pattern: - -1: CPU -2: (depends on model) -3: (depends on model) -4: GPU -5: Main battery: main sensor -6: Bay battery: main sensor -7: Main battery: secondary sensor -8: Bay battery: secondary sensor -9-15: (depends on model) - -For the R51 (source: Thomas Gruber): -2: Mini-PCI -3: Internal HDD - -For the T43, T43/p (source: Shmidoax/Thinkwiki.org) -http://thinkwiki.org/wiki/Thermal_Sensors#ThinkPad_T43.2C_T43p -2: System board, left side (near PCMCIA slot), reported as HDAPS temp -3: PCMCIA slot -9: MCH (northbridge) to DRAM Bus -10: ICH (southbridge), under Mini-PCI card, under touchpad -11: Power regulator, underside of system board, below F2 key - -The A31 has a very atypical layout for the thermal sensors -(source: Milos Popovic, http://thinkwiki.org/wiki/Thermal_Sensors#ThinkPad_A31) -1: CPU -2: Main Battery: main sensor -3: Power Converter -4: Bay Battery: main sensor -5: MCH (northbridge) -6: PCMCIA/ambient -7: Main Battery: secondary sensor -8: Bay Battery: secondary sensor - - -EXPERIMENTAL: Embedded controller register dump -- /proc/acpi/ibm/ecdump ------------------------------------------------------------------------- - -This feature is marked EXPERIMENTAL because the implementation -directly accesses hardware registers and may not work as expected. USE -WITH CAUTION! To use this feature, you need to supply the -experimental=1 parameter when loading the module. - -This feature dumps the values of 256 embedded controller -registers. Values which have changed since the last time the registers -were dumped are marked with a star: - -[root@x40 ibm-acpi]# cat /proc/acpi/ibm/ecdump -EC +00 +01 +02 +03 +04 +05 +06 +07 +08 +09 +0a +0b +0c +0d +0e +0f -EC 0x00: a7 47 87 01 fe 96 00 08 01 00 cb 00 00 00 40 00 -EC 0x10: 00 00 ff ff f4 3c 87 09 01 ff 42 01 ff ff 0d 00 -EC 0x20: 00 00 00 00 00 00 00 00 00 00 00 03 43 00 00 80 -EC 0x30: 01 07 1a 00 30 04 00 00 *85 00 00 10 00 50 00 00 -EC 0x40: 00 00 00 00 00 00 14 01 00 04 00 00 00 00 00 00 -EC 0x50: 00 c0 02 0d 00 01 01 02 02 03 03 03 03 *bc *02 *bc -EC 0x60: *02 *bc *02 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0x70: 00 00 00 00 00 12 30 40 *24 *26 *2c *27 *20 80 *1f 80 -EC 0x80: 00 00 00 06 *37 *0e 03 00 00 00 0e 07 00 00 00 00 -EC 0x90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xa0: *ff 09 ff 09 ff ff *64 00 *00 *00 *a2 41 *ff *ff *e0 00 -EC 0xb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xd0: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xe0: 00 00 00 00 00 00 00 00 11 20 49 04 24 06 55 03 -EC 0xf0: 31 55 48 54 35 38 57 57 08 2f 45 73 07 65 6c 1a - -This feature can be used to determine the register holding the fan -speed on some models. To do that, do the following: - - - make sure the battery is fully charged - - make sure the fan is running - - run 'cat /proc/acpi/ibm/ecdump' several times, once per second or so - -The first step makes sure various charging-related values don't -vary. The second ensures that the fan-related values do vary, since -the fan speed fluctuates a bit. The third will (hopefully) mark the -fan register with a star: - -[root@x40 ibm-acpi]# cat /proc/acpi/ibm/ecdump -EC +00 +01 +02 +03 +04 +05 +06 +07 +08 +09 +0a +0b +0c +0d +0e +0f -EC 0x00: a7 47 87 01 fe 96 00 08 01 00 cb 00 00 00 40 00 -EC 0x10: 00 00 ff ff f4 3c 87 09 01 ff 42 01 ff ff 0d 00 -EC 0x20: 00 00 00 00 00 00 00 00 00 00 00 03 43 00 00 80 -EC 0x30: 01 07 1a 00 30 04 00 00 85 00 00 10 00 50 00 00 -EC 0x40: 00 00 00 00 00 00 14 01 00 04 00 00 00 00 00 00 -EC 0x50: 00 c0 02 0d 00 01 01 02 02 03 03 03 03 bc 02 bc -EC 0x60: 02 bc 02 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0x70: 00 00 00 00 00 12 30 40 24 27 2c 27 21 80 1f 80 -EC 0x80: 00 00 00 06 *be 0d 03 00 00 00 0e 07 00 00 00 00 -EC 0x90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xa0: ff 09 ff 09 ff ff 64 00 00 00 a2 41 ff ff e0 00 -EC 0xb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xd0: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -EC 0xe0: 00 00 00 00 00 00 00 00 11 20 49 04 24 06 55 03 -EC 0xf0: 31 55 48 54 35 38 57 57 08 2f 45 73 07 65 6c 1a - -Another set of values that varies often is the temperature -readings. Since temperatures don't change vary fast, you can take -several quick dumps to eliminate them. - -You can use a similar method to figure out the meaning of other -embedded controller registers - e.g. make sure nothing else changes -except the charging or discharging battery to determine which -registers contain the current battery capacity, etc. If you experiment -with this, do send me your results (including some complete dumps with -a description of the conditions when they were taken.) - -LCD brightness control -- /proc/acpi/ibm/brightness ---------------------------------------------------- - -This feature allows software control of the LCD brightness on ThinkPad -models which don't have a hardware brightness slider. The available -commands are: - - echo up >/proc/acpi/ibm/brightness - echo down >/proc/acpi/ibm/brightness - echo 'level <level>' >/proc/acpi/ibm/brightness - -The <level> number range is 0 to 7, although not all of them may be -distinct. The current brightness level is shown in the file. - -Volume control -- /proc/acpi/ibm/volume ---------------------------------------- - -This feature allows volume control on ThinkPad models which don't have -a hardware volume knob. The available commands are: - - echo up >/proc/acpi/ibm/volume - echo down >/proc/acpi/ibm/volume - echo mute >/proc/acpi/ibm/volume - echo 'level <level>' >/proc/acpi/ibm/volume - -The <level> number range is 0 to 15 although not all of them may be -distinct. The unmute the volume after the mute command, use either the -up or down command (the level command will not unmute the volume). -The current volume level and mute state is shown in the file. - -EXPERIMENTAL: fan speed, fan enable/disable -- /proc/acpi/ibm/fan ------------------------------------------------------------------ - -This feature is marked EXPERIMENTAL because the implementation -directly accesses hardware registers and may not work as expected. USE -WITH CAUTION! To use this feature, you need to supply the -experimental=1 parameter when loading the module. - -This feature attempts to show the current fan speed, control mode and -other fan data that might be available. The speed is read directly -from the hardware registers of the embedded controller. This is known -to work on later R, T and X series ThinkPads but may show a bogus -value on other models. - -Most ThinkPad fans work in "levels". Level 0 stops the fan. The higher -the level, the higher the fan speed, although adjacent levels often map -to the same fan speed. 7 is the highest level, where the fan reaches -the maximum recommended speed. Level "auto" means the EC changes the -fan level according to some internal algorithm, usually based on -readings from the thermal sensors. Level "disengaged" means the EC -disables the speed-locked closed-loop fan control, and drives the fan as -fast as it can go, which might exceed hardware limits, so use this level -with caution. - -The fan usually ramps up or down slowly from one speed to another, -and it is normal for the EC to take several seconds to react to fan -commands. - -The fan may be enabled or disabled with the following commands: - - echo enable >/proc/acpi/ibm/fan - echo disable >/proc/acpi/ibm/fan - -Placing a fan on level 0 is the same as disabling it. Enabling a fan -will try to place it in a safe level if it is too slow or disabled. - -WARNING WARNING WARNING: do not leave the fan disabled unless you are -monitoring all of the temperature sensor readings and you are ready to -enable it if necessary to avoid overheating. - -An enabled fan in level "auto" may stop spinning if the EC decides the -ThinkPad is cool enough and doesn't need the extra airflow. This is -normal, and the EC will spin the fan up if the varios thermal readings -rise too much. - -On the X40, this seems to depend on the CPU and HDD temperatures. -Specifically, the fan is turned on when either the CPU temperature -climbs to 56 degrees or the HDD temperature climbs to 46 degrees. The -fan is turned off when the CPU temperature drops to 49 degrees and the -HDD temperature drops to 41 degrees. These thresholds cannot -currently be controlled. - -The fan level can be controlled with the command: - - echo 'level <level>' > /proc/acpi/ibm/thermal - -Where <level> is an integer from 0 to 7, or one of the words "auto" -or "disengaged" (without the quotes). Not all ThinkPads support the -"auto" and "disengaged" levels. - -On the X31 and X40 (and ONLY on those models), the fan speed can be -controlled to a certain degree. Once the fan is running, it can be -forced to run faster or slower with the following command: - - echo 'speed <speed>' > /proc/acpi/ibm/thermal - -The sustainable range of fan speeds on the X40 appears to be from -about 3700 to about 7350. Values outside this range either do not have -any effect or the fan speed eventually settles somewhere in that -range. The fan cannot be stopped or started with this command. - -The ThinkPad's ACPI DSDT code will reprogram the fan on its own when -certain conditions are met. It will override any fan programming done -through ibm-acpi. - -EXPERIMENTAL: WAN -- /proc/acpi/ibm/wan ---------------------------------------- - -This feature is marked EXPERIMENTAL because the implementation -directly accesses hardware registers and may not work as expected. USE -WITH CAUTION! To use this feature, you need to supply the -experimental=1 parameter when loading the module. - -This feature shows the presence and current state of a WAN (Sierra -Wireless EV-DO) device. If WAN is installed, the following commands can -be used: - - echo enable > /proc/acpi/ibm/wan - echo disable > /proc/acpi/ibm/wan - -It was tested on a Lenovo Thinkpad X60. It should probably work on other -Thinkpad models which come with this module installed. - -Multiple Commands, Module Parameters ------------------------------------- - -Multiple commands can be written to the proc files in one shot by -separating them with commas, for example: - - echo enable,0xffff > /proc/acpi/ibm/hotkey - echo lcd_disable,crt_enable > /proc/acpi/ibm/video - -Commands can also be specified when loading the ibm_acpi module, for -example: - - modprobe ibm_acpi hotkey=enable,0xffff video=auto_disable - -The ibm-acpi kernel driver can be programmed to revert the fan level -to a safe setting if userspace does not issue one of the fan commands: -"enable", "disable", "level" or "watchdog" within a configurable -ammount of time. To do this, use the "watchdog" command. - - echo 'watchdog <interval>' > /proc/acpi/ibm/fan - -Interval is the ammount of time in seconds to wait for one of the -above mentioned fan commands before reseting the fan level to a safe -one. If set to zero, the watchdog is disabled (default). When the -watchdog timer runs out, it does the exact equivalent of the "enable" -fan command. - -Note that the watchdog timer stops after it enables the fan. It will -be rearmed again automatically (using the same interval) when one of -the above mentioned fan commands is received. The fan watchdog is, -therefore, not suitable to protect against fan mode changes made -through means other than the "enable", "disable", and "level" fan -commands. - - -Example Configuration ---------------------- - -The ACPI support in the kernel is intended to be used in conjunction -with a user-space daemon, acpid. The configuration files for this -daemon control what actions are taken in response to various ACPI -events. An example set of configuration files are included in the -config/ directory of the tarball package available on the web -site. Note that these are provided for illustration purposes only and -may need to be adapted to your particular setup. - -The following utility scripts are used by the example action -scripts (included with ibm-acpi for completeness): - - /usr/local/sbin/idectl -- from the hdparm source distribution, - see http://www.ibiblio.org/pub/Linux/system/hardware - /usr/local/sbin/laptop_mode -- from the Linux kernel source - distribution, see Documentation/laptop-mode.txt - /sbin/service -- comes with Redhat/Fedora distributions - /usr/sbin/hibernate -- from the Software Suspend 2 distribution, - see http://softwaresuspend.berlios.de/ - -Toan T Nguyen <ntt@physics.ucla.edu> notes that Suse uses the -powersave program to suspend ('powersave --suspend-to-ram') or -hibernate ('powersave --suspend-to-disk'). This means that the -hibernate script is not needed on that distribution. - -Henrik Brix Andersen <brix@gentoo.org> has written a Gentoo ACPI event -handler script for the X31. You can get the latest version from -http://dev.gentoo.org/~brix/files/x31.sh - -David Schweikert <dws@ee.eth.ch> has written an alternative blank.sh -script which works on Debian systems. This scripts has now been -extended to also work on Fedora systems and included as the default -blank.sh in the distribution. |