no login prompt for the serial com port

[杜睿哲_Pegatron]

Hi there,

 

I use grub as coreboot’s payload and successfully get the “grub>” prompt. Then I use following commands try to bring-up my linux kernel:

 

set isofile="/core-image-minimal-mohonpeak64.iso"

loopback loop (usb0,1)$isofile

linux (loop)/vmlinuz root=/dev/ram0 iso-scan/filename=${isofile} console=tty1 console=ttyS1,115200n8  ramdisk_size=102400

initrd (loop)/initrd

boot

 

The boot process was successful until the last step and before displaying login prompt, only one blinking cursor left. I expect it was redirected to other serial port but I don’t know how to connect to it. Following is my grub.cfg:

 

serial --unit=1 --speed=115200 --word=8 --parity=no --stop=1

terminal_input --append  serial

terminal_output --append serial

 

#

# Sample GRUB configuration file

#

 

echo 'Hello world!'

# Boot automatically after 30 secs.

set timeout=30

 

Is there someone that can help? Thanks.

 

-Hilbert

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