Have one laptop that has had UB 18.10 installed for several weeks. Can create a second user successfully and log in OK. Installed UB 18.10 with an ISO about 1 week old. Install went correctly. Tried to add second user and it was created OK. However, when I try to log in get message “can’s start session”.
login as that user via a TTY.
journalctl -ae --full
Use the scroll keys to move around - see if you can find out what the issue is via the systemd log file you are viewing.
When I created the second user I created the password for the user and this had a problem logging in. So, I deleted the second user and then recreated it. This time I checked the box to set the user create their own pw on first login. This time everything worked correctly.
Can you repeat this with a third user with a specific password for the user?
If so please report that on launchpad - that snippet of info would be useful
Looking in journalctl and seeing why the failure to login will give an indication where the problem is and where it should be reported.
I am afraid I did something stupid since I can’t reproduce the problem regardless of how many users I add. Can you delete this thread?