[coreboot] Execute Linux on AMD DB-FT3b-LC through GRUB2

[Grigore Lupescu]

Hello Zoran,

[1-3] I am using the latest Ubuntu 16.04 LTS x64 desktop, 4.4 kernel.
[4] I don't know exactly if it's x64 or x86. I have no control over AMI
BIOS since it's just a binary I flash into the SPI ROM, which supports the
board.
[5] I boot Linux using legacy mode (in AMI, the Linux was installed for
legacy boot on the HDD/SSD which connects via USB - USBtoSATA)
[6] I'm not sure. So I have the following checked:
- Run VGA Option ROMs, Native Mode
- Add a VGA BIOS image -> 3rdparty/blobs.../VBIOS.bin
- Set framebuffer resolution (any, without this + above, I have no HDMI
output)
[7] It's the same one referenced from Coreboot in the external payloads -
GRUB 2.02 beta3.

>From your view where would the overflow / boot problems come from ?

Thank you,
Grigore

On Mon, Nov 28, 2016 at 6:31 PM, Zoran Stojsavljevic <
zoran.stojsavljevic at gmail.com> wrote:

> Hello Grigore,
>
> I have here some dummy questions (forgive me for my ignorance), but I need
> to ask them just for the sake of curiosity (maybe, after all, we can get
> somewhere if I articulate questions in the right direction/right format for
> this problem):
>
> > If I put a proprietary AMI BIOS, GRUB2 works without issue in gfxterm
> mode and boots Linux without issue.
>
> [1] What Linux architecture are you using (32 or 64)?
> [2] Which Linux distro?
> [3] Which kernel version?
>
> If you put AMI BIOS, the following questions I would like to know:
>
> [4] Are you using 32 or 64 BIOS?
> [5] Which mode are you using for booting (legacy/CSM ON or UEFI/CSM OFF)?
> [6] In the accordance with [5], what video component you have set with
> CMOS: vBIOS or GOP driver?
>
> Not sure, but it seems to me that you are using too old/outdated GRUB2
> version (or maybe I am also mistaken)?
> [7] Could you tell us, which GRUB2 version you are using?
>
> Thank you,
> Zoran
>
> On Mon, Nov 28, 2016 at 7:13 PM, Grigore Lupescu via coreboot <
> coreboot at coreboot.org> wrote:
>
>> Hello,
>>
>> I am trying to run Linux through the GRUB2 payload. I am not tied to
>> GRUB2 but it's the only payload that gives me HDMI output (board has no
>> serial port) using Coreboot and AMD FT3B-LC.
>>
>> I have the latest Coreboot sources, have set config accordingly (e.g.
>> CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME="DB-FT3b-LC"...), getting an image
>> on HDMI and the GRUB2 payload is executing.
>> In GRUB2 payload I seem to have an overflow issue possibly related to the
>> *vga_text* mode. If I put a proprietary AMI BIOS, GRUB2 works without
>> issue in gfxterm mode and boots Linux without issue.
>>
>> Using Coreboot every time the screen gets full of text, GRUB2
>> re-executes. If I though set the terminal_output to cbmemc then commands
>> would execute but Linux still fails to execute - at the end GRUB2 would
>> restart.
>>
>> Also the GRUB2 payload on Coreboot does see the drive/files and attempts
>> to execute - I looks like a GRUB2/Coreboot config/code problem.
>>
>> I execute the below in GRUB2 (which work on AMI BIOS + GRUB2).
>> grub> set root=(hd0,gpt2)
>> grub> linux /boot/vmlinuz-3.13.0-29-generic root=/dev/sda2
>> grub> initrd /boot/initrd.img-3.13.0-29-generic
>> grub> boot
>>
>> 1. Would anyone have any recommendation about the overflow in GRUB2
>> payload ? - related to Coreboot.
>> 2. Any suggestions on booting Linux given this board's limitations on
>> output (HDMI only) ?
>>
>> Thank you,
>> Grigore
>>
>> --
>> coreboot mailing list: coreboot at coreboot.org
>> https://www.coreboot.org/mailman/listinfo/coreboot
>>
>
>
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