ubiquity-dm: starting
ubiquity-dm: plymouth
ubiquity-dm: start X ['X', '-br', '-ac', '-noreset', '-nolisten', 'tcp', '-background', 'none', 'vt1', ':0']

X.Org X Server 1.19.3
Release Date: 2017-03-15
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-77-generic x86_64 Ubuntu
Current Operating System: Linux ubuntu 4.11.0-10-generic #15-Ubuntu SMP Thu Jun 29 15:03:41 UTC 2017 x86_64
Kernel command line: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
Build Date: 10 May 2017  10:07:09AM
xorg-server 2:1.19.3-1ubuntu2 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.34.0
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Sat Aug  5 20:13:31 2017
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
ubiquity-dm: set vars
ubiquity-dm: pam_open_session
ubiquity-dm: dm-scripts
ubiquity-dm: dconf-service
ubiquity-dm: start frontend gtk_ui
No such schema “org.gnome.metacity”
ubiquity-dm: start greeter
Activating service name='org.a11y.atspi.Registry'
Successfully activated service 'org.a11y.atspi.Registry'
Gjs-Message: JS WARNING: [resource:///org/gnome/shell/ui/main.js 317]: reference to undefined property global.stage
Gjs-Message: JS WARNING: [resource:///org/gnome/shell/ui/layout.js 217]: reference to undefined property global.window_group
Gjs-Message: JS WARNING: [resource:///org/gnome/shell/ui/osdMonitorLabeler.js 59]: reference to undefined property Meta.MonitorManager
current session already has an ibus-daemon.
Gjs-Message: JS WARNING: [resource:///org/gnome/shell/ui/slider.js 34]: reference to undefined property St.GenericAccessible
Gjs-Message: JS WARNING: [resource:///org/gnome/shell/ui/layout.js 29]: reference to undefined property actor.meta_window
GNOME Shell-Message: Error looking up permission: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.impl.portal.PermissionStore was not provided by any .service files
Gjs-Message: JS WARNING: [resource:///org/gnome/gjs/modules/tweener/tweener.js 540]: reference to undefined property properties[istr].isSpecialProperty
ubiquity-dm: greeter exited with code 0
No such schema “org.gnome.metacity”

(gnome-shell:1718): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'

(gnome-shell:1718): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(II) Server terminated successfully (0). Closing log file.
ubiquity-dm: set_locale
Generating locales (this might take a while)...
  en_US.UTF-8... done
Generation complete.
ubiquity-dm: Exiting with code 0