Let the user choose the wallpaper to be displayed in the login screen

[Nekhelesh Ramananthan]

This is closed related to https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/844081 where Mark Shuttleworth mentioned that the wallpaper is like your public face in a computer. I agree and like the way how lightdm personalizes your login screen. However, I feel that this personalization of the login screen can further be improved.

Instead of lightdm automatically taking the user's wallpaper, the user could be allowed to choose what wallpaper is shown in the login screen. This way he can come up with some nice personalization where the login screen can be used to display his face with some nice text. This feature would address two requests from the ubuntu community,

1. Privacy is not lost. (user can have any wallpaper he wants) https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/891563

2. Login screen is personalized with his profile picture (may it be facebook or google+ or whatever)

One example could be seen in about.me website. Check out this link http://about.me/markdolby imagining lightdm would look like this if implemented.

[Nekhelesh Ramananthan (nik90)]

I understand this could be difficult to implement for precise but could be considered for 12.10 or later.

[Fernando (fernando-018)]

If this feature is difficult to implement for precise, i think that no one should see an image located in my private home folder. This should not be marked as "Wishlist" considering this is a LTS edition. Privacy in first place, features in second place!