I want to connect a second monitor, keyboard and mouse to my PC (running Ubuntu) and let somebody else (e.g. my son) use the a different TTY while I am working.
I know I can switch between TTYs using Alt+F[1-6], and that I could potentially start several X sessions (Alt+F[7-12]), but is it possible to use them at the same time with different I/O devices?
In a way I'd like to emulate the way computers used to work in the old days, when you'd have a central machine with several "terminals" attached. Linux (and Unix style OSs) are generally designed for that, so it should be possible, right?