Evolutiion fails to start. Cannot connect /tmp/dbus-*

[Raphael Mankin]

I have a new installation of xubuntu 16.04 fully updated within the past hour, running on a Lenovo T550.

I have been using Evolution for a couple oof dys, but after this morning's update it is failing to start. Error message is

$ evolution

** (evolution:3169): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-4Me0oN1k69: Connection refused

Nothing in syslog.

$ lsb_release -rd
Description: Ubuntu 16.04.3 LTS
Release: 16.04

$ apt-cache policy evolution
evolution:
  Installed: 3.18.5.2-0ubuntu3.2
  Candidate: 3.18.5.2-0ubuntu3.2
  Version table:
 *** 3.18.5.2-0ubuntu3.2 500
        500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     3.18.5.2-0ubuntu1 500
        500 http://gb.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: evolution 3.18.5.2-0ubuntu3.2
ProcVersionSignature: Ubuntu 4.4.0-112.135-generic 4.4.98
Uname: Linux 4.4.0-112-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Sun Feb 11 12:19:26 2018
InstallationDate: Installed on 2018-02-09 (2 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: No upgrade log present (probably fresh install)

[Raphael Mankin (raph-p)]

Following up on my report, if I try to start it as root instead of as a normal user it starts, but I get:

** (evolution:4716): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-4Me0oN1k69: Connection refused

(evolution:4716): Gtk-WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files

(evolution:4716): evolution-mail-WARNING **: e_mail_remote_content_set_config_filename: Failed to open '/root/.config/evolution/mail/remote-content.db': unable to open database file

(evolution:4716): evolution-mail-WARNING **: e_mail_properties_set_config_filename: Failed to open '/root/.config/evolution/mail/properties.db': unable to open database file

** (evolution-alarm-notify:4725): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-4Me0oN1k69: Connection refused

[Raphael Mankin (raph-p)]

Another follow-up:

I get the same error from ubuntu-bug.

[Raphael Mankin (raph-p)]

Yet another follow-up:

I did a 'pkill -9 evolution' after which I could start evolution.

After a logout/login evolution would not start. After a pkill it did.
Removing the evolution background servers from the session startup cleared the
problem.

I could then also start evolution automatically at session startup.