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I ended up choosing gdm as my login manager during my upgrade from 12.04 to 12.10. Now all I have is the boring default gray gdm login. How can I change it back?

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up vote 2 down vote accepted

First go in terminal and make lightdm your default display manager:

sudo dpkg-reconfigure lightdm

Use arrow keys ( and ) and Enter in the menu that appear in terminal to select lightdm as default.

Then go in tty1 by pressing Ctrl+Alt+F1 and run next two commands:

sudo service stop gdm
sudo service start lightdm
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You're very wise, thank you for your answer. It's now fixed! – Eli Jul 16 '13 at 4:46
@Eli I edited my answer to make the changes permanently. – Radu Rădeanu Jul 16 '13 at 5:07

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