raviga@raviga-desktop:~$ sudo apt-get update
[sudo] password for raviga: 
Hit http://archive.canonical.com lucid Release.gpg
Hit http://security.ubuntu.com lucid-security Release.gpg                      
Ign http://archive.canonical.com/ubuntu/ lucid/partner Translation-en_IN       
Ign http://security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_IN   
Hit http://archive.canonical.com lucid Release.gpg                             
Ign http://security.ubuntu.com/ubuntu/ lucid-security/restricted Translation-en_IN
Ign http://archive.canonical.com/ lucid/partner Translation-en_IN              
Ign http://security.ubuntu.com/ubuntu/ lucid-security/universe Translation-en_IN
Hit http://in.archive.ubuntu.com lucid Release.gpg
Hit http://archive.canonical.com lucid Release 
Ign http://security.ubuntu.com/ubuntu/ lucid-security/multiverse Translation-en_IN
Hit http://archive.canonical.com lucid Release                                 
Hit http://security.ubuntu.com lucid-security Release                          
Ign http://in.archive.ubuntu.com/ubuntu/ lucid/main Translation-en_IN
Hit http://archive.canonical.com lucid/partner Packages
Hit http://security.ubuntu.com lucid-security/main Packages
Hit http://archive.canonical.com lucid/partner Packages
Hit http://security.ubuntu.com lucid-security/restricted Packages
Hit http://security.ubuntu.com lucid-security/main Sources
Hit http://security.ubuntu.com lucid-security/restricted Sources
Hit http://security.ubuntu.com lucid-security/universe Packages
Hit http://security.ubuntu.com lucid-security/universe Sources           
Hit http://security.ubuntu.com lucid-security/multiverse Packages        
Hit http://security.ubuntu.com lucid-security/multiverse Sources
Ign http://in.archive.ubuntu.com/ubuntu/ lucid/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com/ubuntu/ lucid/universe Translation-en_IN
Ign http://in.archive.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_IN
Hit http://in.archive.ubuntu.com lucid-updates Release.gpg
Ign http://in.archive.ubuntu.com/ubuntu/ lucid-updates/main Translation-en_IN
Ign http://in.archive.ubuntu.com/ubuntu/ lucid-updates/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com/ubuntu/ lucid-updates/universe Translation-en_IN
Ign http://in.archive.ubuntu.com/ubuntu/ lucid-updates/multiverse Translation-en_IN
Hit http://in.archive.ubuntu.com lucid Release
Hit http://in.archive.ubuntu.com lucid-updates Release                   
Hit http://in.archive.ubuntu.com lucid/main Packages                     
Hit http://in.archive.ubuntu.com lucid/restricted Packages
Hit http://in.archive.ubuntu.com lucid/main Sources
Hit http://in.archive.ubuntu.com lucid/restricted Sources
Hit http://in.archive.ubuntu.com lucid/universe Packages
Hit http://in.archive.ubuntu.com lucid/universe Sources
Hit http://in.archive.ubuntu.com lucid/multiverse Packages
Hit http://in.archive.ubuntu.com lucid/multiverse Sources
Hit http://in.archive.ubuntu.com lucid-updates/main Packages
Hit http://in.archive.ubuntu.com lucid-updates/restricted Packages
Hit http://in.archive.ubuntu.com lucid-updates/main Sources
Hit http://in.archive.ubuntu.com lucid-updates/restricted Sources
Hit http://in.archive.ubuntu.com lucid-updates/universe Packages
Hit http://in.archive.ubuntu.com lucid-updates/universe Sources
Hit http://in.archive.ubuntu.com lucid-updates/multiverse Packages
Hit http://in.archive.ubuntu.com lucid-updates/multiverse Sources
Reading package lists... Done
raviga@raviga-desktop:~$ sudo apt-get install ubuntu-desktop
Reading package lists... Done
Building dependency tree       
Reading state information... Done
ubuntu-desktop is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
raviga@raviga-desktop:~$ sudo apt-get install gdm
Reading package lists... Done
Building dependency tree       
Reading state information... Done
gdm is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
raviga@raviga-desktop:~$ sudo /etc/init.d/gdm start
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service gdm start

Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the start(8) utility, e.g. start gdm
raviga@raviga-desktop:~$ sudo dpkg-reconfigure xserver-xorg
raviga@raviga-desktop:~$ sudo startx


Fatal server error:
Server is already active for display 0
	If this server is no longer running, remove /tmp/.X0-lock
	and start again.


Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 

 ddxSigGiveUp: Closing log