chmod 622 /dev/console

chmod 622 /dev/tty1

chmod 666 /dev/ttyS1

-----------------

change the /etc/init/tty1.

from: exec /sbin/getty -8 38400 tty1

to:exec /sbin/getty -L ttyS1 38400 vt100

---------------

change grub config file: /etc/default/grub

from: GRUB_CMDLINE_LINUX="pciehp.pciehp_force=1 pciehp.pciehp_debug=1"

to: GRUB_CMDLINE_LINUX="condole=ttyS1,38400 console=tty1 pciehp.pciehp_force=1 pciehp.pciehp_debug=1"

-----------------

update-grub

install-grub /dev/sda