I have a system without serial port where I could connect a serial port
to an other system to view the boot message. So when I use the
following command in grub it hangs.
serial --unit=0 --speed=9600
Basically I want to disable the grub boot messages that are
printed on the video output. Is there any option to disable the grub
boot messages to appear on the video output than directing it to the
serial port as above.