monitors.xml not parsed or applied after reboot with multiple monitors in non-default positions
ERROR(syslog) = "Failed to get current display configuration state: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Name "org.gnome.Mutter.DisplayConfig" does not exist"
CAUSE = clean install of Ubuntu 18.10(4.18.0-16-generic #17-Ubuntu SMP Fri Feb 8 00:06:57 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux), attach VGA as primary monitor and HDMI(wireless Tx) as secondary to projector and then apply custom monitor positioning using g-c-c "Displays" panel.
RESULT = correct positioning and working of multiple displays until reboot or shutdown.