> 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.
That sounds like the command actually worked, but stopping lightdm and
thus the graphics driver breaks the state of the graphics card. Does
changing VTs with Ctrl-Alt-F2 work? If not, please check if you can
still log into the system with ssh (I suppose that works), and capture
"sudo journalctl -b > /tmp/journal.txt" and "systemctl status >
/tmp/status.txt" and attach the files here. Also, which graphics
driver/card are you using? Please don't file bugs direectly in
Launchpad, use "ubuntu-bug" for this (this will automatically attach
information about your hardware).
> 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.
Ubuntu does not modify the upstream unit, and it does have
AllowIsolate=yes. "CanIsolate" does not exist.
** Changed in: systemd (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1603151
Title:
systemctl isolate anyname.target not working
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