[coreboot] How to start GRUB2 in graphic mode as primary payload?

[G]

  On 2018-03-25 12:15, Nico Huber wrote:
> Hello Giulio,
> 
>   CONFIG_GENERIC_LINEAR_FRAMEBUFFER
> 
> as opposed to the
> 
>   CONFIG_VGA_TEXT_FRAMEBUFFER=y
> 

Hello again,
i started with a clean coreboot config and a clean grub2 config just 
configuring the minimum required. It now seems to work as grub is 
loading correctly the font specified and also the resolution look like 
to be the correct 1366x768.
The 'videoinfo' command now shows "Coreboot Video Adapter" and the an 
empty list (no resolution and/or other infos).
I still can't get the background image to work but this look like a big 
improvment.

I'm attaching the new coreboot and grub config in case anyone has 
similar problems.

Thanks
Giulio
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