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.
 What Linux architecture are you using (32 or 64)?  Which Linux distro?  Which kernel version?
If you put AMI BIOS, the following questions I would like to know:
 Are you using 32 or 64 BIOS?  Which mode are you using for booting (legacy/CSM ON or UEFI/CSM OFF)?  In the accordance with , 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Not sure, but it seems to me that you are using too old/outdated GRUB2 version (or maybe I am also mistaken)?  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 < firstname.lastname@example.org> wrote:
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
- 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
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