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ACPI_WMI(4)		     Kernel Interfaces Manual		     ACPI_WMI(4)

NAME
     acpi_wmi -- ACPI to WMI mapping driver

SYNOPSIS
     To compile this driver into the kernel, place the following line in your
     kernel configuration file:

	   device acpi_wmi

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

	   acpi_wmi_load="YES"

DESCRIPTION
     The acpi_wmi driver provides an interface for vendor specific WMI implemen-
     tations  (e.g.  HP and Acer laptops).  It creates /dev/wmistat%d, which can
     be read to get information about GUIDs found in the system.

FILES
     /dev/wmistat%d  WMI status devices.

SYSCTLS
     The following sysctl node is currently implemented:

     dev.acpi_wmi.%d.bmof  binary Managed Object Format (MOF) buffer

EXAMPLES
     Read GUIDs from the first WMI interface found in the system:

     # cat /dev/wmistat0
     GUID				   INST EXPE METH STR EVENT OID
     {5FB7F034-2C63-45E9-BE91-3D44E2C707E4}   1 NO   WMAA NO  NO    AA
     {95F24279-4D7B-4334-9387-ACCDC67EF61C}   1 NO   NO   NO  0x80+ -
     {2B814318-4BE8-4707-9D84-A190A859B5D0}   1 NO   NO   NO  0xA0  -
     {05901221-D566-11D1-B2F0-00A0C9062910}   1 NO   NO   NO  NO    AB
     {1F4C91EB-DC5C-460B-951D-C7CB9B4B8D5E}   1 NO   WMBA NO  NO    BA
     {2D114B49-2DFB-4130-B8FE-4A3C09E75133}  57 NO   NO   NO  NO    BC
     {988D08E3-68F4-4C35-AF3E-6A1B8106F83C}  20 NO   NO   NO  NO    BD
     {14EA9746-CE1F-4098-A0E0-7045CB4DA745}   1 NO   NO   NO  NO    BE
     {322F2028-0F84-4901-988E-015176049E2D}   2 NO   NO   NO  NO    BF
     {8232DE3D-663D-4327-A8F4-E293ADB9BF05}   0 NO   NO   NO  NO    BG
     {8F1F6436-9F42-42C8-BADC-0E9424F20C9A}   0 NO   NO   NO  NO    BH
     {8F1F6435-9F42-42C8-BADC-0E9424F20C9A}   0 NO   NO   NO  NO    BI

     Read    first    WMI    interface	  description	 with	 bmf2mof    from
     ports/converters/bmfdec:

     # sysctl -b dev.acpi_wmi.0.bmof | bmf2mof
     [abstract]
     class Lenovo_BIOSElement {
     };

     [WMI, Dynamic, Provider("WMIProv"), WmiExpense(1), Description("Bios Setting"),
     GUID("{51F5230E-9677-46cd-A1CF-C0B23EE34DB7}"), Locale("MS\0x409")]
     class Lenovo_BiosSetting : Lenovo_BiosElement {
       [key, read] String InstanceName;
	 [read] Boolean Active;
	   [WmiDataId(1), Description("BIOS setting")] String CurrentSetting;
	   };
	...

SEE ALSO
     acpi(4)

STANDARDS
     Windows	Instrumentation:    WMI   and	ACPI,	Microsoft   Corporation,
     https://github.com/microsoft/Windows-driver-samples/tree/main/wmi/wmiacpi.

HISTORY
     The acpi_wmi device driver first appeared in FreeBSD 8.0.

AUTHORS
     The acpi_wmi driver was written by Michael Gmelin <freebsd@grem.de>.

     Work inspired by the Linux acpi-wmi driver written by Carlos Corbacho.

     MOF handling inspired by the Linux wmi-bmof  driver  written  by  Andy  Lu-
     tomirski.

     This manual page was written by Michael Gmelin <freebsd@grem.de>.

FreeBSD ports 15.quarterly	  June 12, 2025 		     ACPI_WMI(4)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=acpi_wmi&sektion=4&manpath=FreeBSD+15.1-RELEASE+and+Ports.quarterly>

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