Can't boot Ubuntu 12.04 in graphics mode or safe graphics mode

I can boot into ubuntu only in tty screen non-graphics mode only. My machince is with intel onboard DG33 graphics. I have already run these commands without any error.

Code:

sudo apt-get remove xserver-xorg
sudo apt-get --purge xserver-xorg
sudo apt-get install xserver-xorg
sudo dpkg-reconfigure xserver-xorg

All commands run fine, but in normal mode it just hangs in the middle and in recovery mode it boots in to black login screen. Thanks

 

Your lightdm package seems to get corrupt, please reconfigure lightdm to get the X-session back.

Otherwise a better option is to install gnome-unity to get the X-session back, it generally reconfigures lightdm with its installation.

 

Thanks Srijan
I installed the gnome-shell, but still booting into tty black screen login.
Anything else I can do to get the graphics login back?

 

Please check if gnome-session-fallback is installed, if not install it.

 

I run the command:
sudo apt-get install gnome-session-fallback and I am getting:
It is already the newest version

 

Check this one http://rolling-ubuntu.blogspot.in/2012/09/how-to-install-gdm-instead-of-lightdm.html