Changing MAC address in ThinkCentre M910q BIOS

[Jcampitelli]

I have two Lenovo ThinkCentre mini I flashed the same .bin file on both devices and I noticed that the MAC address is the same for both devices. I plan on using Intel AMT on these devices, so the MAC will need to be changed at the BIOS level not the OS level. Is there a way to do that with a tool, or is modifying the .bin file the only way?

[SMDFlea]

Re: Changing MAC address in BIOS

I have two Lenovo ThinkCentre mini I flashed the same .bin file on both devices and I noticed that the MAC address is the same for both devices. I plan on using Intel AMT on these devices, so the MAC will need to be changed at the BIOS level not the OS level. Is there a way to do that with a tool, or is modifying the .bin file the only way?

It would help if we knew what the model number is.

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[Jcampitelli]

Re: Changing MAC address in BIOS

The model is ThinkCentre M910q and the machine type is 10MUS1K600

[SMDFlea]

Re: Changing MAC address in BIOS

The model is ThinkCentre M910q and the machine type is 10MUS1K600

The MAC address is at 1000h and 2000h .Edit both with a hex editor, or extract the whole Gbe region (full size is 2000h) from your old bios using UEFITool or hex editor and edit it into new bios 1000 - 2FFF.



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[Jcampitelli]

Re: Changing MAC address in ThinkCentre M910q BIOS

I opened the bin file using a hex editor and I see the MAC address at 1000-1005. I see FF at 2000-2005. I’ll try replacing 1000-1005 and reflashing. I assume I can leave 2000-2005 alone.

[Jcampitelli]

Re: Changing MAC address in ThinkCentre M910q BIOS

I think I may have messed something up. I used a hex editor to modify the MAC address at 1000-1005 but I'm getting PXE and NVM errors. I attached the PXE error. After the PXE error I can boot to the OS and the new MAC is recognized and Intel ATM is working. I was able to disable PXE boot to make the error go away. I'm getting an invalid NVM checksum error when booting the Debian installer.

I'll try extracting the entire Gbe region like SMDFlea suggested and reflash.

[Jcampitelli]

Re: Changing MAC address in ThinkCentre M910q BIOS

I was able to fix the issue by extracting the entire Gbe region and reflashing.