Re: [coreboot] Porting Qotom Q355G4 SBC (similar to Librem 13)

[Angel Pons]

Hello John,

Silly but crucial question: is Intel Boot Guard enabled on this board? If
it is enabled in Verified Mode, I am afraid replacing the firmware with
coreboot is impossible and proceeding any further is futile.
To make sure, you can check Intel Boot Guard's status with
coreboot/util/intelmetool. IIRC, another way to check would to change the
reset vector (last 16 bytes of the firmware image) on the vendor firmware
without changing what it actually does. The reset vector usually (if not
always) contains a JMP instruction, if you change what comes after it the
board should boot fine.

Please check this before doing anything else to avoid wasting time.

Best regards,

Angel Pons