Comment 7 for bug 893590

I have found out that the first seat can be called without using th -sharevts option. See the attached lightdm.conf. With this new configuration I get an almost perfect two seat configuration but one problem remain.

If the second seat closes a session (and hence restart its X server to go back to lightdm greeting screen) the first seat is moved to a new virtual terminal. To get back to the original terminal we need to type alt-f7 in seat 1. This is quite annoying, but much less annoying than killing the session with ctr-c. Note that the -sharevts option precludes this behavior but has the ctr-c kills X problem.