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

X.Org X Server 1.18.3
Release Date: 2016-04-04
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.13.0-87-generic x86_64 Ubuntu
Current Operating System: Linux ubuntu-mate 4.4.0-23-generic #41-Ubuntu SMP Mon May 16 23:04:25 UTC 2016 x86_64
Kernel command line: file=/cdrom/preseed/ubuntu-mate.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
Build Date: 31 May 2016  11:35:56PM
xorg-server 2:1.18.3-1ubuntu6 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.33.6
	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: Thu Jun  2 15:23:31 2016
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
pci id for fd 11: 80ee:beef, driver (null)
EGL_MESA_drm_image required.
ubiquity-dm: set vars
ubiquity-dm: pam_open_session
ubiquity-dm: dm-scripts
ubiquity-dm: dbus
ubiquity-dm: dconf-service
ubiquity-dm: start frontend gtk_ui

** (process:1699): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
ubiquity-dm: start greeter

(process:1709): indicator-sound-WARNING **: volume-control-pulse.vala:735: unable to get pulse unix socket: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.PulseAudio1 was not provided by any .service files
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
Activating service name='org.a11y.atspi.Registry'
Successfully activated service 'org.a11y.atspi.Registry'

(process:1709): indicator-sound-WARNING **: accounts-service-access.vala:125: unable to find Accounts path for user null: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name com.canonical.UnityGreeter was not provided by any .service files
Window manager warning: Log level 16: g_object_set_valist: object class 'MetaFrames' has no property named 'type'

(panel:1706): Gdk-CRITICAL **: gdk_window_set_geometry_hints: assertion 'geometry != NULL || geom_mask == 0' failed