Public bug reported:
Users authenticate against LDAP. Was fine until I upgraded to Ubuntu
18.04. /home is nfs mounted.
I've checked all logs I can find, syslog, auth, kern, lightdm, Xorg,
.xsession-errors. My main suspect from auth.log is:
lightdm: pam_systemd(lightdm:session): Failed to create session: Connection
timed out
There seems to be a 25 second timeout and if the session isn't ready it
goes back to the login screen (here lightdm-greeter).
Something else is bugging me: when a given session DOES let me login,
after restarting lightdm for whatever reason, I won't be able to log
back in. It's like the lightdm restart doesn't properly terminate, and
some bad clues are left in the user's home folder so that the next try
will end in a login loop.
Reinstalling flashback with apt-get install --reinstall gnome-session-flashback
didn't help.
~/.Xauthority is owned and writable by the owner. This has never been a problem.
No login problem for an old local account.
** Affects: gnome-flashback (Ubuntu)
Importance: Undecided
Status: New
** Tags: 18.04 flashback gnome lightdm session ubuntu
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https://bugs.launchpad.net/bugs/1802094
Title:
Can not start Flashback session in 18.04 (Bionic) after update from
16.04 (Xenial)
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