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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-21 17:13:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-21 17:13:24 -0700
commit27a3353a4525afe984f3b793681869d636136b69 (patch)
tree6c89654b6203b5b3196c128ced8a6b6c8b60b58a /Documentation/laptops
parent6f68fbaafbaa033205cd131d3e1f3c4b914e9b78 (diff)
parent785cfc0324b9321efb85b0935af2b474d615daa1 (diff)
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86: (32 commits) Move N014, N051 and CR620 dmi information to load scm dmi table drivers/platform/x86/eeepc-wmi.c: fix build warning X86 platfrom wmi: Add debug facility to dump WMI data in a readable way X86 platform wmi: Also log GUID string when an event happens and debug is set X86 platform wmi: Introduce debug param to log all WMI events Clean up all objects used by scm model when driver initial fail or exit msi-laptop: fix up some coding style issues found by checkpatch msi-laptop: Add i8042 filter to sync sw state with BIOS when function key pressed msi-laptop: Set rfkill init state when msi-laptop intiial msi-laptop: Add MSI CR620 notebook dmi information to scm models table msi-laptop: Add N014 N051 dmi information to scm models table drivers/platform/x86: Use kmemdup drivers/platform/x86: Use kzalloc drivers/platform/x86: Clarify the MRST IPC driver description slightly eeepc-wmi: depends on BACKLIGHT_CLASS_DEVICE IPC driver for Intel Mobile Internet Device (MID) platforms classmate-laptop: Add RFKILL support. thinkpad-acpi: document backlight level writeback at driver init thinkpad-acpi: clean up ACPI handles handling thinkpad-acpi: don't depend on led_path for led firmware type (v2) ...
Diffstat (limited to 'Documentation/laptops')
-rw-r--r--Documentation/laptops/thinkpad-acpi.txt66
1 files changed, 49 insertions, 17 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 39c0a09d0105..fc15538d8b46 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -292,13 +292,13 @@ sysfs notes:
Warning: when in NVRAM mode, the volume up/down/mute
keys are synthesized according to changes in the mixer,
- so you have to use volume up or volume down to unmute,
- as per the ThinkPad volume mixer user interface. When
- in ACPI event mode, volume up/down/mute are reported as
- separate events, but this behaviour may be corrected in
- future releases of this driver, in which case the
- ThinkPad volume mixer user interface semantics will be
- enforced.
+ which uses a single volume up or volume down hotkey
+ press to unmute, as per the ThinkPad volume mixer user
+ interface. When in ACPI event mode, volume up/down/mute
+ events are reported by the firmware and can behave
+ differently (and that behaviour changes with firmware
+ version -- not just with firmware models -- as well as
+ OSI(Linux) state).
hotkey_poll_freq:
frequency in Hz for hot key polling. It must be between
@@ -309,7 +309,7 @@ sysfs notes:
will cause hot key presses that require NVRAM polling
to never be reported.
- Setting hotkey_poll_freq too low will cause repeated
+ Setting hotkey_poll_freq too low may cause repeated
pressings of the same hot key to be misreported as a
single key press, or to not even be detected at all.
The recommended polling frequency is 10Hz.
@@ -397,6 +397,7 @@ ACPI Scan
event code Key Notes
0x1001 0x00 FN+F1 -
+
0x1002 0x01 FN+F2 IBM: battery (rare)
Lenovo: Screen lock
@@ -404,7 +405,8 @@ event code Key Notes
this hot key, even with hot keys
disabled or with Fn+F3 masked
off
- IBM: screen lock
+ IBM: screen lock, often turns
+ off the ThinkLight as side-effect
Lenovo: battery
0x1004 0x03 FN+F4 Sleep button (ACPI sleep button
@@ -433,7 +435,8 @@ event code Key Notes
Do you feel lucky today?
0x1008 0x07 FN+F8 IBM: toggle screen expand
- Lenovo: configure UltraNav
+ Lenovo: configure UltraNav,
+ or toggle screen expand
0x1009 0x08 FN+F9 -
.. .. ..
@@ -444,7 +447,7 @@ event code Key Notes
either through the ACPI event,
or through a hotkey event.
The firmware may refuse to
- generate further FN+F4 key
+ generate further FN+F12 key
press events until a S3 or S4
ACPI sleep cycle is performed,
or some time passes.
@@ -512,15 +515,19 @@ events for switches:
SW_RFKILL_ALL T60 and later hardware rfkill rocker switch
SW_TABLET_MODE Tablet ThinkPads HKEY events 0x5009 and 0x500A
-Non hot-key ACPI HKEY event map:
+Non hotkey ACPI HKEY event map:
+-------------------------------
+
+Events that are not propagated by the driver, except for legacy
+compatibility purposes when hotkey_report_mode is set to 1:
+
0x5001 Lid closed
0x5002 Lid opened
0x5009 Tablet swivel: switched to tablet mode
0x500A Tablet swivel: switched to normal mode
0x7000 Radio Switch may have changed state
-The above events are not propagated by the driver, except for legacy
-compatibility purposes when hotkey_report_mode is set to 1.
+Events that are never propagated by the driver:
0x2304 System is waking up from suspend to undock
0x2305 System is waking up from suspend to eject bay
@@ -528,14 +535,39 @@ compatibility purposes when hotkey_report_mode is set to 1.
0x2405 System is waking up from hibernation to eject bay
0x5010 Brightness level changed/control event
-The above events are never propagated by the driver.
+Events that are propagated by the driver to userspace:
+0x2313 ALARM: System is waking up from suspend because
+ the battery is nearly empty
+0x2413 ALARM: System is waking up from hibernation because
+ the battery is nearly empty
0x3003 Bay ejection (see 0x2x05) complete, can sleep again
+0x3006 Bay hotplug request (hint to power up SATA link when
+ the optical drive tray is ejected)
0x4003 Undocked (see 0x2x04), can sleep again
0x500B Tablet pen inserted into its storage bay
0x500C Tablet pen removed from its storage bay
-
-The above events are propagated by the driver.
+0x6011 ALARM: battery is too hot
+0x6012 ALARM: battery is extremely hot
+0x6021 ALARM: a sensor is too hot
+0x6022 ALARM: a sensor is extremely hot
+0x6030 System thermal table changed
+
+Battery nearly empty alarms are a last resort attempt to get the
+operating system to hibernate or shutdown cleanly (0x2313), or shutdown
+cleanly (0x2413) before power is lost. They must be acted upon, as the
+wake up caused by the firmware will have negated most safety nets...
+
+When any of the "too hot" alarms happen, according to Lenovo the user
+should suspend or hibernate the laptop (and in the case of battery
+alarms, unplug the AC adapter) to let it cool down. These alarms do
+signal that something is wrong, they should never happen on normal
+operating conditions.
+
+The "extremely hot" alarms are emergencies. According to Lenovo, the
+operating system is to force either an immediate suspend or hibernate
+cycle, or a system shutdown. Obviously, something is very wrong if this
+happens.
Compatibility notes:

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