I tried the "fix" listed in https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/207157 by creating /etc/X11/Xsession.d/15dbus file. It seems to have fixed the problem, however "use-session-dbus" is listed in /etc/X11/Xsession.options and I don't know what if any conflict this will cause.
I tried the "fix" listed in https:/ /bugs.launchpad .net/ubuntu/ +source/ dbus/+bug/ 207157 by creating /etc/X11/ Xsession. d/15dbus file. It seems to have fixed the problem, however "use-session-dbus" is listed in /etc/X11/ Xsession. options and I don't know what if any conflict this will cause.