Ubuntu: Change login screen to gnome-shell login


I was just goofing around in a vm to test what would happen if I purgen unity:

sudo apt-get remove --purge unity*  

I found that I get an startup error, but when I proceed, I got this awesome login screen: all sexy It has an sexy effect and is just the gnome style my whole pc has got.

So can any one please tell me how I change the default login screen program without having to bother clicking "fix this error" on every boot?

Thanks in advance.


I have been able to change it(my own answer), but now I see the old purple background for a second when I logged in, and that background is only used in the old greeter screen. How do I change it(or where are those backgrounds located)?


sudo dpkg-reconfigure lightdm  

I selected gdm, and now I have the login screen I desire.(This replaces lightdm with gdm)

Thanks for the other suggestions, I found that this was the only one to work, since gnome has it's own desktop manager(gdm).


Boot in recovery mode, select root shell and issue: dpkg-reconfigure -phigh xserver-xorg. The error is related to misconfigured xorg. Have you installed the virtualbox extension pack? If not, do it!


If you are using lightdm as display manager, you can change the greeter in /etc/lightdm/lightdm.conf.

For example to use lightdm-gtk-greeter (=xfce greater):

#greeter-session=unity-greeter  greeter-session=lightdm-gtk-greeter    # Other options:    # to change unity to xfce session on default:  #user-session=ubuntu  user-session=xfce  # or to xubuntu:  #user-session=xubuntu    # hide users  greeter-hide-users=true    # disable guest login  allow-guest=false  

As you can see there are more customization options to hide users or to select the default session for example. I don't know the name of the login screen on your picture so I used the one I use on my machine but I guess you can find it out on your virtual machine and use it on your main if that is what you want to do.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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