[coreboot] Supermicro H8QME-2+ mct_d fatal exit.

Rudolf Marek r.marek at assembler.cz
Fri Mar 5 16:55:07 CET 2010


This is pointing to something which is powered from 5VSB voltage. It could be 
some GPIO settings which sets voltage for ram through some other chip. It could 
be some powersequencing pin connected as GPIO too, it could be a i2c bus 
multiplexer operated by some GPIO pin too ;)

I would suggest to dump the superio chip with "isadump" (all logical devices) 
and all registers powered from the 5VSB well if known. Check for changes on GPIO 
pins or SuperIO global config.

Check if the fail is caused by missing SPD EPROMS (error SMBus reads) or just by 
ram itself.

It could be also something from the SB itself, but try with superio first.

Then compare the dumps with that you obtained from coreboot (you will need to 
program that) You can check from linux with legacy bios, then boot with coreboot 
and then boot with power unplugged.

Good luck,


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