[coreboot] Building with SeaBIOS and serial debugging

Martin Roth gaumless at gmail.com
Mon Apr 25 20:31:48 CEST 2016

Hi Dylan,
I'm not sure if you've already figured this problem out, but the
CONFIG variables are set by Kconfig and would be in your .config file.
Looking at the .config file you posted I have no idea how you're
seeing anything coming out on serial from coreboot. The only logging I
see is to CBMEM.

It's going to be difficult to help you debug this on the email list,
so I'd suggest joining the IRC channel and asking there.  Feel free to
PM me if you still need help - martinr.



On Sun, Apr 24, 2016 at 5:02 AM, Maxime de Roucy
<maxime.deroucy at gmail.com> wrote:
> Hello,
>> From reading the Makefile in payloads/external/SeaBIOS,
>> set. However, I can't seem to find which config file I need to modify
>> to properly set these variables. Additionally, CONFIG_TTYS0_BASE
>> needs to be set as well.
>> I've also attempted to manually build SeaBIOS with serial output
>> enabled, but that didn't seem to have any impact on the result.
> From what I know you will have to slightly modify the coreboot source
> to be able to personalize your seabios configuration.
> https://pelican.craoc.fr/coreboot.html#seabios_1
> --
> Regards
> Maxime de Roucy
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