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Possible Duplicate:
How can I make LightDM the default display manager?

I have installed Ubuntu 11.10 beta and all of its changes are now working and let me testing them, but the only missing thing is the lightdm's new theme which doesn't work and insted I have the old gdm login screen. My question is how to replace it with the newest lightdm.

EDIT: I figured out what is the problem which is really different from the possible duplicate inserted here!!!. The problem is that I need to install a package called unity-greeter to make the new Ubuntu lightdm theme work. So please guys reopen the question as I want to answer it with what I found.

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marked as duplicate by Jorge Castro, fossfreedom, Vojtech Trefny, jrg, RolandiXor Sep 3 '11 at 19:33

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1 Answer 1

Run sudo dpkg-reconfigure lightdm and choose lightdm as default login manager (or simply remove gdm package).

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Actually I tried removing gdm, but nothing happens!!. and when I trying sudo dpkg-reconfigure lightdm, I got this: dpkg-maintscript-helper: warning: environment variable DPKG_MAINTSCRIPT_NAME missing dpkg-maintscript-helper: warning: environment variable DPKG_MAINTSCRIPT_PACKAGE missing –  Wazery Sep 3 '11 at 17:19
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maybe my lightdm theme not installed correctly.. if so how to repair it? –  Wazery Sep 3 '11 at 17:26
    
I have the same problem. I can't reconfigure lightdm as I get the same error message. This is quite an old question now - any ideas? –  Poldie Nov 9 '11 at 0:49

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