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I have a serious issue that I don't understand. When I start my computer elementary won't open the graphical window to log in and instead it starts a tty terminal. To get the graphical login window I have to login in the tty and run 

sudo /etc/init.d/lightdm stop
sudo /etc/init.d/lightdm start

Sometimes it takes a few minutes (about 2min max) before it shows the dock and the menu-bar.

I didn't do anything to have this problem. Just some regular updates...

Update : thanks to @bigbang it's resolved by running this command : 

sudo dpkg-reconfigure lightdm
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  • Could you try to enter in terminal: dpkg-reconfigure lightdm? What results in typing "cat /etc/X11/default-display-manager" in terminal?
    – bigbang
    Oct 10, 2017 at 13:49
  • When i run dpkg-reconfigure lightdm I have this output : ** insserv: warning: script is corrupt or invalid: /etc/init.d/../rc2.d/S01shm_load insserv: warning: current start runlevel(s) (empty) of script lightdm' overrides LSB defaults (2 3 4 5). insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script lightdm' overrides LSB defaults (0 1 6).** And when I run cat /etc/X11/default-display-manager I have : /usr/sbin/lightdm
    – Gatsby
    Oct 12, 2017 at 16:08
  • I created my suggestions as an answer, please mark the answer as solved. Thanks!
    – bigbang
    Oct 13, 2017 at 11:14

1 Answer 1

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You can try to resolve the problem by typing:

sudo dpkg-reconfigure lightdm

Perhaps there is a confusion between display managers. To show the current one, type:

cat /etc/X11/default-display-manager

For other solutions, you have to investigate further.

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