System Management BIOS
Status	Published
Year started	1999; 22 years ago
Latest version	3.4.0 August 20, 2020; 9 months ago
Organization	Distributed Management Task Force (DMTF)
Related standards	Common Information Model (CIM), Web-Based Enterprise Management (WBEM), Redfish
Domain	Systems management
Abbreviation	SMBIOS
Website	www.dmtf.org/standards/smbios

[solved] HP Probook 4530s No Sound
Keyboard Drivers
Cached
Smbios Version

11 System Management BIOS (SMBIOS) Reference Specification 373. Version 2.7.1 DSP0134. System Management BIOS (SMBIOS) Reference Specification. System Management BIOS (SMBIOS) Reference Specification. Oct 28, 2016 EFI HP BIOS Update 2.7.1.0 Started Failed init of SMBIOS data. HpBiosUpdate.txt (log file from BiosUpdate folder) HP BIOS Image Interface Protocol Version 1.0 BattInit: Protocol 2010. All Required Protocols Located Lang reported as eng. Language Selected is currently (eng). Failed Reading BIOS Image Hewlett-Packard BIOS New 68SCE.bin.

In computing, the System Management BIOS (SMBIOS) specification defines data structures (and access methods) that can be used to read management information produced by the BIOS of a computer.^[1] This eliminates the need for the operating system to probe hardware directly to discover what devices are present in the computer. The SMBIOS specification is produced by the Distributed Management Task Force (DMTF), a non-profit standards development organization. The DMTF estimates that two billion client and server systems implement SMBIOS.^[2]

The DMTF released the version 3.4.0 of the specification on August 20, 2020.^[3]

SMBIOS was originally known as Desktop Management BIOS (DMIBIOS), since it interacted with the Desktop Management Interface (DMI).^[4]

History[edit]

Version 1 of the Desktop Management BIOS (DMIBIOS) specification was produced by Phoenix Technologies in or before 1996.^{[citation needed]}

Version 2.0 of the Desktop Management BIOS specification was released on March 6, 1996 by American Megatrends (AMI), Award Software, Dell, Intel, Phoenix Technologies, and SystemSoft Corporation. It introduced 16-bit plug-and-play functions used to access the structures from Windows 95.^[5]

The last version to be published directly by vendors was 2.3 on August 12, 1998. The authors were American Megatrends, Award Software, Compaq, Dell, Hewlett-Packard, Intel, International Business Machines (IBM), Phoenix Technologies, and SystemSoft Corporation.

Circa 1999, the Distributed Management Task Force (DMTF) took ownership of the specification. The first version published by the DMTF was 2.3.1 on March 16, 1999. At approximately the same time Microsoft started to require that OEMs and BIOS vendors support the interface/data-set in order to have Microsoft certification.

Version 3.0.0, introduced in February 2015, added a 64-bit entry point, which can coexist with the previously defined 32-bit entry point.

Version 3.4.0 was released in August 2020.^[6]

Contents[edit]

The SMBIOS table consists in an entry point (two types are defined, 32-bit and 64-bit), and a variable number of structures that describe platform components and features. These structures are occasionally referred to as 'tables' or 'records' in third-party documentation.

Structure types[edit]

As of version 3.3.0, the SMBIOS specification defines the following structure types:^[7]^[8]

Type	Description
0	BIOS Information
1	System Information
2	Baseboard (or Module) Information
3	System Enclosure or Chassis
4	Processor Information
5	Memory Controller Information (Obsolete)
6	Memory Module Information (Obsolete)
7	Cache Information
8	Port Connector Information
9	System Slots
10	On Board Devices Information
11	OEM Strings
12	System Configuration Options
13	BIOS Language Information
14	Group Associations
15	System Event Log
16	Physical Memory Array
17	Memory Device
18	32-Bit Memory Error Information
19	Memory Array Mapped Address
20	Memory Device Mapped Address
21	Built-in Pointing Device
22	Portable Battery
23	System Reset
24	Hardware Security
25	System Power Controls
26	Voltage Probe
27	Cooling Device
28	Temperature Probe
29	Electrical Current Probe
30	Out-of-Band Remote Access
31	Boot Integrity Services (BIS) Entry Point
32	System Boot Information
33	64-Bit Memory Error Information
34	Management Device
35	Management Device Component
36	Management Device Threshold Data
37	Memory Channel
38	IPMI Device Information
39	System Power Supply
40	Additional Information
41	Onboard Devices Extended Information
42	Management Controller Host Interface
43	TPM Device
44	Processor Additional Information
126	Inactive
127	End-of-Table
128–255	Available for system- and OEM- specific information

Accessing SMBIOS data[edit]

The EFI configuration table (EFI_CONFIGURATION_TABLE) contains entries pointing to the SMBIOS 2 and/or SMBIOS 3 tables.^[9] There are several ways to access the data, depending on the platform and operating system.

From UEFI[edit]

[solved] HP Probook 4530s No Sound

In the UEFI Shell, the SmbiosView command can retrieve and display the SMBIOS data.^[10]^[11] One can often enter the UEFI shell by entering the BIOS, and then selecting the shell as a boot option (as opposed to a DVD drive or hard drive).

From Linux[edit]

The Linux kernel contains an SMBIOS decoder, allowing systems administrators to inspect system hardware configuration and to enable or disable certain workarounds for problems with specific systems, based on the provided SMBIOS information.

The userspacecommand-line utility dmidecode(8) inspects this data. Information provided by this utility typically includes the system manufacturer, model name, serial number, BIOS version and asset tag, as well other details of varying level of interest and reliability, depending on the system manufacturer. The information often includes usage status for the CPU sockets, expansion slots (including AGP, PCI and ISA) and memory module slots, and the list of I/O ports (including serial, parallel and USB).^[12]^[13] Decoded DMI tables for various computer models are collected in a public GitHub repository.^[14]

For Dell systems there is a libsmbios utility.^[15]

From Windows[edit]

Microsoft specifies WMI as the preferred mechanism for accessing SMBIOS

Smbios Version 2.7.1