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I have LightDM installed and can start it with sudo start lightdm. But at boot, GDM is still the default. How can change this so LightDM is loaded automatically at boot instead of GDM?

RolandiXor
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Anders Feder
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3 Answers3

46
sudo dpkg-reconfigure lightdm

Will prompt you to make it default. More information here:

Jorge Castro
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    I have the feeling it is not working $ sudo dpkg-reconfigure lightdm [sudo] password for user: dpkg-maintscript-helper: warning: environment variable DPKG_MAINTSCRIPT_NAME missing dpkg-maintscript-helper: warning: environment variable DPKG_MAINTSCRIPT_PACKAGE missing – seb Sep 03 '11 at 23:43
  • @ seb, I get the same warning and my issue (http://askubuntu.com/questions/63134/how-to-get-the-proper-lightdm-theme) has not been fixed... I'm quite certain I'm running LightDM because entering "lightdm --test-mode" in a console gives me the exact same login screen. – Matthijs Sep 30 '11 at 08:59
  • I have the same problem. Googling reveals we are not alone, but there appears to be no solution. –  Nov 09 '11 at 09:34
10

/etc/X11/default-display-manager should currently contain something else than lightdm.

Like I answered in another question, since LightDM starts on your machine, you should reference the binary in /etc/X11/default-display-manager :

sudo sh -c 'echo "/usr/sbin/lightdm" > /etc/X11/default-display-manager'
Community
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eric.lemerdy
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2

Do this:

$ sudo systemctl disable gdm.service  
$ sudo systemctl enable lightdm.service

Here enable starts service at boot. You can know more about it here.

ThunderBird
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Aniket Raj
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