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Everytime I boot up my ubuntu 12.10, I get a black console screen.

I need to login in tty, and restart lightdm : sudo service lightdm restart

Then the GUI lightdm login screen appears as expected.

How to solve this annoying problem ?

Thank you.

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Are you using the kernel from the proposed pocket? There was a bug that prevented the system to boot properly. –  Andrea Corbellini Dec 14 '12 at 17:05
    
My kernel is 3.5.0-19-generic and my architecture 64bits. So I don't think i encountered this bug...anyway, I found a way to solve that annoying problem. Thank you. –  Sulliwane Dec 15 '12 at 8:18

2 Answers 2

Finally, I solved the problem by :

  • installing GDM: sudo apt-get install gdm
  • choosing it by default: When asked, choose GDM as your default X windows manager
  • restarting: sudo reboot
  • Reverting to lightdm as default X window manager: dpkg-reconfigure lightdm

Ps : firing the command dpkg-reconfigure lightdm without having installed GDM before didn't solve my problem. So try installing GDM before.

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same issue exists on 32-bit. i don't know how i got to this state, though. i had both gdm and lightdm before i tried your fix (changing to gdm and back to lightdm). –  Jayen Dec 15 '12 at 9:06
    
This should be the accepted answer. –  karlingen Sep 6 '13 at 23:49
up vote 1 down vote accepted

This issue could be related to the use of a SSD.

If the first solution doesn't work for you, another workaround is to delay the startup of lightdm.

sudo nano /etc/init/lightdm.conf

and just BEFORE exec lightm, insert this single line :

sleep 2

Adjust the time (in seconds) depending on your needs (2 sec works for me). Save the file, and restart !

Found this solution here : http://www.webupd8.org/2013/01/ubuntu-lightdm-black-screen-when-using.html

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I've had the same problem on two notebooks with SSD drives. I had to use sleep 2 (delay is not installed on my Ubuntu 12.10). –  Carles Barrobés Mar 24 '13 at 23:06
    
oups, you're right. the command is sleep, and not delay. Updated ! thx –  Sulliwane Mar 26 '13 at 0:00

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