You missed out "a". kmscon is a replacement. * http://unix.stackexchange.com/a/177209/5132 http://unix.stackexchange.com/a/177209/5132 As you can see, it fol

You missed out "a". kmscon is a replacement. * http://unix.stackexchange.com/a/177209/5132 http://unix.stackexchange.com/a/177209/5132 As you can see, it followed quite a lot of others. And, as mentioned, it's not what's under discussion here. It (like the others) uses pseudo-terminal devices, with the line discipline code in the kernel.