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How can I install Gnome Desktop on Ubuntu 15.04 with unity? Don't want to make a new clean install-- Any idea? Can't find any information about it!

A.B.
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Joachim Kjølby Due
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2 Answers2

38

Log out and open a terminal on TTY1 Ctrl+Alt+F1 and run the following commands:

sudo apt-get install ubuntu-gnome-desktop
sudo service gdm restart

As @Exocom said, the following step is not necessary.

sudo dpkg-reconfigure gdm

Then choose the desktop you want and you can log in again.

A.B.
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    As far as I can see it, step 2) and 3) are not necessary. You will be asked to choose your display manager on step 1) and after logging out gdm will be started automatically. – Exocom Jun 01 '15 at 15:32
  • @Exocom Thx, I will add your comment. – A.B. Jun 01 '15 at 15:34
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    The gdm restart is necessary after all, sorry about the wrong information in the comment before. I corrected the answer accordingly (and tried it a few times this time ;-))! – Exocom Jun 02 '15 at 06:43
  • What if I do it in terminal without logging out. Any cons? – Rehan Ullah Jul 31 '15 at 13:56
  • Thanks @A.B. but on 15.10 if you see black screen on login then you can switch back to lightdm. See this: http://askubuntu.com/questions/571252/ubuntu-gnome-14-10-upgrade-to-gnome-3-14-blank-screen-cant-login – abhimanyuaryan Dec 12 '15 at 23:42
  • @A.B. anyways is it possible to use gdm and still not get the black desktop screen? I like gdm login. – abhimanyuaryan Dec 12 '15 at 23:43
5

Open a terminal and execute:

sudo apt-get install gnome

Choose "gdm" when asked.

In case not being asked execute : 

sudo dpkg-reconfigure gdm

To restart the system execute : 

sudo reboot

Rebooting after installing a new DE is not necessary, however some say it is recommended.

Update :

To make up your own mind on this topic, read When is it necessary to reboot an Ubuntu system?

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