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How to load graphical display manager when booting?

I have just upgrade to 11.10 from 10.04. I cannot see login screen on tty7. I can still login into tty 1-6. I have tried install gnome-shell from gnome3 ppa and gnome-panel but it doesn't help.

What should I do?

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marked as duplicate by Marco Ceppi Jan 10 '12 at 20:03

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It was saying unrecognized service –  Phương Nguyễn Jan 2 '12 at 13:22
    
when you said you upgraded from 10.04 to 11.10 - how did you do that? –  fossfreedom Jan 2 '12 at 13:50
    
@jokerdino: Thanks man. Please make an answer then I will accept. –  Phương Nguyễn Jan 2 '12 at 14:27
    
@fossfreedom: I first run cdromupgrade from alternate CD of 11.04 and then again run cdromupgrade from alternate CD of 11.10 –  Phương Nguyễn Jan 2 '12 at 14:28
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1 Answer 1

up vote 5 down vote accepted

Try the following command in a terminal:

sudo apt-get update && sudo apt-get install lightdm

to ensure that Lightdm is properly installed.

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