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ACPI_HP(4) Kernel Interfaces Manual ACPI_HP(4) NAME acpi_hp -- ACPI extras driver for HP laptops SYNOPSIS To compile this driver into the kernel, place the following line in your kernel configuration file: device acpi_hp Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): acpi_hp_load="YES" DESCRIPTION The acpi_hp driver provides support for ACPI-controlled features found on HP laptops that use a WMI enabled BIOS (e.g., HP Compaq 8510p and 6510p). The main purpose of this driver is to provide an interface, accessible via sysctl(8), devd(8) and devfs(8), through which applications can de- termine and change the status of various laptop components and BIOS settings. devd(8) Events Devd events received by devd(8) provide the following information: system "ACPI" subsystem "HP" type The source of the event in the ACPI namespace. The value depends on the model. notify Event code (see below). Event codes: 0xc0 WLAN on air status changed to 0 (not on air) 0xc1 WLAN on air status changed to 1 (on air) 0xd0 Bluetooth on air status changed to 0 (not on air) 0xd1 Bluetooth on air status changed to 1 (on air) 0xe0 WWAN on air status changed to 0 (not on air) 0xe1 WWAN on air status changed to 1 (on air) devfs(8) Device You can read /dev/hpcmi to see your current BIOS settings. The detail level can be adjusted by setting the sysctl cmi_detail as described be- low. SYSCTL VARIABLES The following sysctls are currently implemented: WLAN: dev.acpi_hp.0.wlan_enabled Toggle WLAN chip activity. dev.acpi_hp.0.wlan_radio (read-only) WLAN radio status (controlled by hardware switch) dev.acpi_hp.0.wlan_on_air (read-only) WLAN on air (chip enabled, hardware switch enabled + enabled in BIOS) dev.acpi_hp.0.wlan_enabled_if_radio_on If set to 1, the WLAN chip will be enabled if the radio is turned on dev.acpi_hp.0.wlan_disable_if_radio_off If set to 1, the WLAN chip will be disabled if the radio is turned off Bluetooth: dev.acpi_hp.0.bt_enabled Toggle Bluetooth chip activity. dev.acpi_hp.0.bt_radio (read-only) Bluetooth radio status (controlled by hardware switch) dev.acpi_hp.0.bt_on_air (read-only) Bluetooth on air (chip enabled, hardware switch en- abled + enabled in BIOS) dev.acpi_hp.0.bt_enabled_if_radio_on If set to 1, the Bluetooth chip will be enabled if the radio is turned on dev.acpi_hp.0.bt_disable_if_radio_off If set to 1, the Bluetooth chip will be disabled if the radio is turned off WWAN: dev.acpi_hp.0.wwan_enabled Toggle WWAN chip activity. dev.acpi_hp.0.wwan_radio (read-only) WWAN radio status (controlled by hardware switch) dev.acpi_hp.0.wwan_on_air (read-only) WWAN on air (chip enabled, hardware switch enabled + enabled in BIOS) dev.acpi_hp.0.wwan_enabled_if_radio_on If set to 1, the WWAN chip will be enabled if the radio is turned on dev.acpi_hp.0.wwan_disable_if_radio_off If set to 1, the WWAN chip will be disabled if the radio is turned off Misc: dev.acpi_hp.0.als_enabled Toggle ambient light sensor (ALS) dev.acpi_hp.0.display (read-only) Display status (bitmask) dev.acpi_hp.0.hdd_temperature (read-only) HDD temperature dev.acpi_hp.0.is_docked (read-only) Docking station status (1 if docked) dev.acpi_hp.0.cmi_detail Bitmask to control detail level in /dev/hpcmi output (values can be ORed). 0x01 Show path component of BIOS setting 0x02 Show a list of valid options for the BIOS setting 0x04 Show additional flags of BIOS setting (ReadOnly etc.) 0x08 Query highest BIOS entry instance. This is broken on many HP models and therefore disabled by de- fault. dev.acpi_hp.0.verbose (read-only) Set verbosity level Defaults for these sysctls can be set in sysctl.conf(5). HARDWARE The acpi_hp driver has been reported to support the following hardware: • HP Compaq 8510p • HP Compaq nx7300 It should work on most HP laptops that feature a WMI enabled BIOS. FILES /dev/hpcmi Interface to read BIOS settings EXAMPLES The following can be added to devd.conf(5) in order disable the LAN in- terface when WLAN on air and reenable if it is not: notify 0 { match "system" "ACPI"; match "subsystem" "HP"; match "notify" "0xc0"; action "ifconfig em0 up"; }; notify 0 { match "system" "ACPI"; match "subsystem" "HP"; match "notify" "0xc1"; action "ifconfig em0 down"; }; Enable the ambient light sensor: sysctl dev.acpi_hp.0.als_enabled=1 Enable Bluetooth: sysctl dev.acpi_hp.0.bt_enabled=1 Get BIOS settings: cat /dev/hpcmi Serial Port Disable Infrared Port Enable Parallel Port Disable Flash Media Reader Disable USB Ports including Express Card slot Enable 1394 Port Enable Cardbus Slot Disable Express Card Slot Disable (...) Set maximum detail level for /dev/hpcmi output: sysctl dev.acpi_hp.0.cmi_detail=7 SEE ALSO acpi(4), acpi_wmi(4), sysctl.conf(5), devd(8), devfs(8), sysctl(8) HISTORY The acpi_hp device driver first appeared in FreeBSD 8.0. AUTHORS The acpi_hp driver was written by Michael Gmelin <freebsd@grem.de>. It has been inspired by hp-wmi driver, which implements a subset of these features (hotkeys) on Linux. HP CMI whitepaper: https://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf wmi-hp for Linux: https://www.kernel.org WMI and ACPI: http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx This manual page was written by Michael Gmelin <freebsd@grem.de>. BUGS This driver is experimental and has only been tested on i386 on an HP Compaq 8510p which featured all supported wireless devices (WWAN/BT/WLAN). Expect undefined results when operating on different hardware. Loading the driver is slow. Reading from /dev/hpcmi is even slower. Additional features like HP specific sensor readings or writing BIOS settings are not supported. FreeBSD 13.2 June 19, 2015 ACPI_HP(4)
NAME | SYNOPSIS | DESCRIPTION | SYSCTL VARIABLES | HARDWARE | FILES | EXAMPLES | SEE ALSO | HISTORY | AUTHORS | BUGS
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