GRUB2 with serial console.. please help me...

[satish kondapalli]

Hi,

I am working on atom based embedded system. This Board has only serial  port.   

In this board UEFI BIOS is coming up and am able to run the GRUB.EFI.   With below grub.cfg file, i am able to load the my kernel(this kernel has initramfs file system for my embedded system ) but while bootinmg the kernel i am not seeing any messages on serial console.  But i am seeing my menu entry and the following error
"
error: no suitable mode found
Booting however
"

This is my grub.cfg file:
-----------------------------------------------------------------------------------------------------------------------
# Boot automatically after 10 secs.
set timeout=10

# By default, boot the first entry.
set default=0

# Fallback to the second entry.
set fallback=1
GRUB_TERMINAL=console

# For booting GNU/Linux
menuentry "MY_KERNEL" {
    set root=(hd0,msdos1)
    linux    /bzImage root=/dev/sda1 ro console=ttyS0,115200

}
------------------------------------------------------------------------------------------------------------------------------------

I am sure my kernel will boot on this board. 
am i missing anything in the cfg file for serial console?