[flashrom] Why does the flash content differ

[David Hendricks]

On Mon, Jul 9, 2018 at 6:37 PM, microsoft gaofei <wangziheng at outlook.com> wrote:
> The commands are just the following:
> sudo flashrom -w newbios --programmer internal
> The operation is successful, BIOS content is replaced and the computer can
> reboot successfully.
> sudo flashrom -r compare --programmer internal
> I later checked their SHA256 and found they’re different. So what happened?
> Did the internal programmer modify the content?

It's likely that something else wrote to the ROM (management engine,
embedded controller, BIOS, etc), especially during after doing a
reboot cycle.