Comment 1 for bug 1770962

This mostly works already (or did, I haven't tested it in a while), you "just" need to make sure the right console=tty$whatever is on the kernel command line. Unfortunately when I talked to people about this, the consensus seemed to be that there is no way to know in general where the serial console is. If you can get to isolinux or grub you can add it yourself but if you can get to those you can probably install on tty1 anyway.