Inside of the /var/lib/tftpboot directory, open pxelinux.cfg/default using your favorite editor. Add these two lines to the top of the file:
console 0
serial 0 19200 0
Open ubuntu-installer/i386/boot-screens/text.cfg in your editor. We are going to remove and add a few things to the “append” line under the “install label”. We are going to remove the word quiet, and replace it with console=ttyS0,19200. After completed it should look like this:
default install
label install
menu label ^Install
menu default
kernel ubuntu-installer/i386/linux
append vga=normal initrd=ubuntu-installer/i386/initrd.gz — console=ttyS0,19200 earlyprint=serial,ttyS0,19200
Now that this is complete, the kernel will now input/output to the serial console.
1) Disable AppArmor – It’s a waste of resources
Type “sudo update-rc.d -f apparmor remove”
2) Configure GRUB – Get the proper stuff going to the console
Open /etc/default/grub in your favorite editor, remove everything and paste this:
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=3
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=”noplymouth text nosplash”
GRUB_CMDLINE_LINUX=”console=ttyS0,19200 earlyprint=serial,ttyS0,19200″
GRUB_TERMINAL=console
GRUB_TERMINAL=serial
GRUB_SERIAL_COMMAND=”serial –unit=0 –speed=19200 –stop=1″
That disables plymouth, configures a text console, and shows GRUB on boot. After this is done, run “update-grub” and “update-initramfs -u”.
참조: http://www.stephenwagner.com/?p=336