How do I invoke the kernel with serial console on 12.04?
In 10.04 I could just add
console=ttyS0 in kernel line or
install quiet console=ttyS0 on boot: line
How do I do that in 12.04?
There is nothing special in 12.04. Just follow the information from: https://help.ubuntu.com/community/SerialConsoleHowto
1) Paste the following into /etc/init/ttyS0.conf
2) Ask upstart to start the getty
This will get you access to console. To get access to Linux init console, configure grub.
1) Edit /etc/default/grub to contain the following lines
2) update grub
I am using 9600 just because I am using a server where the BIOS is already redirected over seria using 9600. If you don't care about the BIOS settings, feel free to use a faster serial line.