lightdim problem

[parlad neupane]

usr/share/apport/apport-gtk:16: PyGIWarning: Wnck was imported without specifying a version first. Use gi.require_version('Wnck', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import GLib, Wnck, GdkX11, Gdk
Unable to update the static FcBlanks: 0x0600
Unable to update the static FcBlanks: 0x0601
Unable to update the static FcBlanks: 0x0602
Unable to update the static FcBlanks: 0x0603
Unable to update the static FcBlanks: 0x06dd
Unable to update the static FcBlanks: 0x070f
Unable to update the static FcBlanks: 0x2028
Unable to update the static FcBlanks: 0x2029
Unable to update the static FcBlanks: 0xfff9
Unable to update the static FcBlanks: 0xfffa
Unable to update the static FcBlanks: 0xfffb
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
cat: /var/log/lightdm/seat0-greeter.log.old: No such file or directory
cat: /etc/lightdm/lightdm.conf: No such file or directory
root@neupane-7:/home/neupane# Unable to update the static FcBlanks: 0x0600
Unable to update the static FcBlanks: 0x0601
Unable to update the static FcBlanks: 0x0602
Unable to update the static FcBlanks: 0x0603
Unable to update the static FcBlanks: 0x06dd
Unable to update the static FcBlanks: 0x070f
Unable to update the static FcBlanks: 0x2028
Unable to update the static FcBlanks: 0x2029
Unable to update the static FcBlanks: 0xfff9
Unable to update the static FcBlanks: 0xfffa
Unable to update the static FcBlanks: 0xfffb
Created new window in existing browser session.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lightdm 1.18.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Tue Oct 25 21:36:36 2016
InstallationDate: Installed on 2016-05-20 (157 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)