Comment 4 for bug 1609436

I have the same issue (no ascii tty when pressing <ctrl><alt><F1>).
I my case adding "nomodeset" boot option lead to dissapearing of second monitor.
It wasn't seen at all (no signal, "detect displays" in "Displays" setting has no effect).
I've resored /etc/default/grub and viola! The second monitor works and ascii tty is working.
Don't know how and why...