I am trying to configure good virtual desktop on my headless headless Ubuntu 14.04 server.Unfortunately, I see the following picture when open remote screen:I.e. windows have no frames and titles.I run VNC with the following /etc/init/Xvnc4.conf (upstart script?):description VNC screen for Dimsstart on (local-filesystems and started dbus and stopped udevtrigger)stop on runlevel [016]expect forkscript     /usr/bin/Xvnc4 :0 -geometry 1280x1024 -PasswordFile /root/.vnc/passwd &     cd /root     export HOME=/root     export DISPLAY=:0     export LANG=en_US.UTF-8     export LANGUAGE=en_US:en     ~/.vnc/xstartupend scriptI have the following content in /root/.vnc/xstartup#!/bin/sh# Uncomment the following two lines for normal desktop:# unset SESSION_MANAGER# exec /etc/X11/xinit/xinitrc[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresourcesxsetroot -solid greyvncconfig -iconic &x-terminal-emulator -geometry 80x24+10+10 -ls -title $VNCDESKTOP Desktop &#x-window-manager &# mwm &gnome-session &/etc/vnc/xstartup is absent/root/.Xresources is absentWhat is wrong here? 
No windows frames on VNC screen
x11;gnome;vnc;upstart;headless