There certainly is a lot of useful information in this output, but it's not necessarily the information needed (and certainly not all of the information
requested by the OP). So how would I, or the OP, use this utility
properly to answer the question, "What is the make (manufacturer) and
model number of my motherboard?" Or does it not answer that question fully?

The dmidecode utility dumps all of the DMI information available to the BIOS, so it is, in effect, the same thing as checking for the MOBO via the BIOS at system boot.

That said, it's important to note that your BIOS knows how to take the DMI information and display it in a format for the display at boot time.

So your bios automatically knows it's a shuttle, but the AK32 is used to show the exact MOBO revision.

That said, the bios must know to check another DMI value to determine whether it is the AK32A as opposed to a straight AK32 or some other revision.

On one of my servers, dmidecode produces:

# dmidecode 2.6
SMBIOS 2.3 present.
61 structures occupying 1735 bytes.
Table at 0x000EF130.
Handle 0x0000
DMI type 0, 19 bytes.
BIOS Information
 Vendor: IBM
 Version: PLKT44AUS
 Release Date: 02/13/2002
 Address: 0xF0000
 Runtime Size: 64 kB
 ROM Size: 256 kB
 Characteristics:
  ISA is supported
  PCI is supported
  PNP is supported
  APM is supported
  BIOS is upgradeable
  BIOS shadowing is allowed
  Boot from CD is supported
  Selectable boot is supported
  Japanese floppy for NEC 9800 1.2 MB is supported (int 13h)
  Japanese floppy for Toshiba 1.2 MB is supported (int 13h)
  5.25"/360 KB floppy services are supported (int 13h)
  5.25"/1.2 MB floppy services are supported (int 13h)
  3.5"/720 KB floppy services are supported (int 13h)
  3.5"/2.88 MB floppy services are supported (int 13h)
  Print screen service is supported (int 5h)
  8042 keyboard services are supported (int 9h)
  Serial services are supported (int 14h)
  Printer services are supported (int 17h)
  CGA/mono video services are supported (int 10h)
  ACPI is supported
  USB legacy is supported
  AGP is supported
  LS-120 boot is supported
  ATAPI Zip drive boot is supported
Handle 0x0001
DMI type 1, 25 bytes.
System Information
 Manufacturer: IBM
 Product Name: 686831U
 Version: Not Specified
 Serial Number: 23NN078
 UUID: 0036AB92-E6AD-2212-8B2C-CFF000D0B779
 Wake-up Type: Power Switch
Handle 0x0002
DMI type 2, 8 bytes.
Base Board Information
 Manufacturer: IBM
 Product Name: 686831U
 Version: Not Specified
 Serial Number: JNZNL0T7V8D

The difference in output is merely a reflection of what is stored in the DMI; in my case it happens to be a little more complete than yours.

Regardless, the tool provides the best opportunity to get the information w/o having to a) find the docs, b) open the box, or c) reboot to get into the BIOS.

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