Using the AMIDEEFI64 Utility v5.22.0066 under UEFI Shell, I successfully changed the data in DMI in part System Information from Default string: Manufacturer Product Name Version Serial Number SKU Family & in part Base Board Information only one entry: Manufacturer I want to set back a Default string in a Base Board > Manufacturer entry but I can't: Code: amidmi /bm "Default string" +---------------------------------------------------------------------------+ | AMIDEEFI64 Utility v5.22.0066 | | Copyright (C)2018 American Megatrends Inc. All Rights Reserved. | +---------------------------------------------------------------------------+ Initializing the SMBIOS interface. Please wait a moment...... ERR_DMI_READ_ONLY e2 - Error: DMI Data write failed. I tried various tools DMI Edit for Windows, DOS and UEFI Shell but not helps. I can only change the values in the DMI part System Information. Why can't I change the value of the Base Board > Manufacturer again ??? UEFI BIOS AMI Aptio V 5.13 How unlock DMI part Base Board ?
Bypassing the problem. Fortunately, I had a copy of the BIOS aimb.bin maked before I edited DMI - I use CH341A by the SPI port but BIOS can also be backup with Fpt.efi (from CSME Tools for compatible platform - my is v12): Code: fpt -d dump.bin I flashing aimb.bin using the Fpt.efi Code: fpt -f aimb.bin using AMIDEEFI64 Utility v5.22.0066 I edited DMI data in System table with this options: /sm /sp /sv /ss /sk /sf
I found a complete solution to the problem on my PC Gen 8 In the hex editor, I compared the bios dump before the DMI (aimb.bin) and after the DMI edition (dmi_locked.bin) and I found it: under UEFI Shell 2 I checked it: Code: FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 Variable NV+RT+BS '4B3082A3-80C6-4D7E-9CD0-583917265DF1:WriteOnceStatus' DataSize = 0x40 00000000: 01 04 01 00 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000010: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000020: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000030: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* I checked the same on another Gen 4 PC and it is different - all data 7F: Code: FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 Variable NV+RT+BS '4B3082A3-80C6-4D7E-9CD0-583917265DF1:WriteOnceStatus' DataSize = 0x40 00000000: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000010: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000020: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000030: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* I saved the value to the unlock.bin file: Code: FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 -s unlock.bin I copied on a pendrive and load it in my PC Gen 8: Code: FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 -l unlock.bin Load and set variables from file: unlock.bin. Variable NV+RT+BS '4B3082A3-80C6-4D7E-9CD0-583917265DF1:WriteOnceStatus' DataSize = 0x40 Now you can easily change DMI SM or BM with AMIDEEFI64 Utility Code: FS1:\> dir Directory of: FS1:\ 04/21/2024 09:51 <DIR> 1,024 EFI 08/14/2018 08:08 r 577,472 SceEfi64.efi 08/02/2017 16:01 12,864 AmiSetupWriter.efi 04/27/2024 14:42 938 e2.log 04/27/2024 14:59 617,267 new.txt 05/22/2018 10:24 433,264 522_2018.efi 02/09/2021 14:06 434,288 521_2018.efi 02/24/2023 14:10 366,256 527_2023.efi 04/28/2024 08:00 3,454,304 Fpt.efi 04/28/2024 07:10 143 one.txt 05/02/2024 08:45 44 error.log 05/02/2024 09:21 33,554,432 dmi_ok.bin 05/03/2024 10:49 128 status_lock.bin 05/03/2024 11:09 128 unlock.bin 15 File(s) 39,507,632 bytes 1 Dir(s) FS1:\> 522_2018 /sm +---------------------------------------------------------------------------+ | AMIDEEFI64 Utility v5.22.0066 | | Copyright (C)2018 American Megatrends Inc. All Rights Reserved. | +---------------------------------------------------------------------------+ Initializing the SMBIOS interface. Please wait a moment...... Name R/W Status Information -------------------------- --- ------ ---------------------------------- (/SM)System manufacture R Done "BlaBlaBla" FS1:\> 522_2018 /sm "Advantech" +---------------------------------------------------------------------------+ | AMIDEEFI64 Utility v5.22.0066 | | Copyright (C)2018 American Megatrends Inc. All Rights Reserved. | +---------------------------------------------------------------------------+ Initializing the SMBIOS interface. Please wait a moment...... ERR_DMI_READ_ONLY e2 - Error: DMI Data write failed. FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 Variable NV+RT+BS '4B3082A3-80C6-4D7E-9CD0-583917265DF1:WriteOnceStatus' DataSize = 0x40 00000000: 01 04 01 00 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000010: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000020: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000030: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 -l unlock.bin Load and set variables from file: unlock.bin. Variable NV+RT+BS '4B3082A3-80C6-4D7E-9CD0-583917265DF1:WriteOnceStatus' DataSize = 0x40 FS1:\> dmpstore WriteOnceStatus -guid 4b3082a3-80c6-4d7e-9cd0-583917265df1 Variable NV+RT+BS '4B3082A3-80C6-4D7E-9CD0-583917265DF1:WriteOnceStatus' DataSize = 0x40 00000000: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000010: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000020: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* 00000030: 7F 7F 7F 7F 7F 7F 7F 7F-7F 7F 7F 7F 7F 7F 7F 7F *................* FS1:\> 522_2018 /sm "Advantech" +---------------------------------------------------------------------------+ | AMIDEEFI64 Utility v5.22.0066 | | Copyright (C)2018 American Megatrends Inc. All Rights Reserved. | +---------------------------------------------------------------------------+ Initializing the SMBIOS interface. Please wait a moment...... Name R/W Status Information -------------------------- --- ------ ---------------------------------- (/SM)System manufacture W Done "Advantech" FS1:\> 522_2018 /sm +---------------------------------------------------------------------------+ | AMIDEEFI64 Utility v5.22.0066 | | Copyright (C)2018 American Megatrends Inc. All Rights Reserved. | +---------------------------------------------------------------------------+ Initializing the SMBIOS interface. Please wait a moment...... Name R/W Status Information -------------------------- --- ------ ---------------------------------- (/SM)System manufacture R Done "Advantech" FS1:\>