[Bug 1603151] Re: systemctl isolate anyname.target not working

[Martin Pitt]

So to summarize, the only problem is that stopping lightdm does not
change the VT back to 1 or 2 or something sensible, but stays at 7 where
no getty ("login:") is running so it might *appear* crashed?

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Title:
  stopping lightdm ends up in an empty console, should switch to VT1

Status in lightdm package in Ubuntu:
  Triaged

Bug description:
  On Ubuntu 16.04 Cinammon, systemctl isolate multi-user.target hangs the system.
  I've tried editing the multi-user.target file as a snippet, or the whole thing, but with no fix.
  The system flashes a very momentary prompt to login as a single user without a GUI, but then the screen goes black and the system is hung.
  Same on Linux Mint 18.
  systemctl isolate multi-user.target works successfully on OpenSuse Leap 42.1, and CentOS 7, as I tested the command on these other systems to check. The glaring difference I noticed is that in the multi-user.target unit file, AllowIsolate and CanIsolate is set to yes in the other Linux systems, but to no in Ubuntu.

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