Hi Experts,I have built grub2 with coreboot platform support (./configure --with-platform=coreboot) and managed to load it as elf payload in coreboot. I have added terminal support in grub configuration coreboot.cfg as followsserial --speed=115200 --unit=0 --word=8 --parity=no --stop=1 terminal_input --append serial terminal_output --append serial terminal_input --append usb_keyboard #add keyboard support.menuentry 'Boot From Hard Disk (Linux)' { insmod (cbfsdisk)/ahci.mod linux (ahci1,msdos1)/boot/bzImage root=/dev/sda1 resume=/dev/sda5 console=ttyS0,115200 }While I see coreboot logs on serial console, I do not see grub2 menu on serial console. I can see grub2 menu on HDMI display though, however my USB keyboard is not working so not able to control grub either through display or serial console.Any help is appreciated.Thanks