I found this bug for dbus: https://bugs.freedesktop.org/show_bug.cgi?id=18446
And indeed in my (default) Ubuntu 16.04 configuration /etc/dbus-1/session.conf, "keep_umask" is set.
This suggests that either dbus is not starting g-t-s on my system, or the problem is elsewhere.
I notice that I do have a /lib/systemd/systemd --user process.
I found this bug for dbus: https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 18446
And indeed in my (default) Ubuntu 16.04 configuration /etc/dbus- 1/session. conf, "keep_umask" is set.
This suggests that either dbus is not starting g-t-s on my system, or the problem is elsewhere.
I notice that I do have a /lib/systemd/ systemd --user process.