How to disable autologin in Lubuntu?

I like to switch sometimes between Lubuntu and Ubuntu 2D on my laptop. But I especially like to choose which one I will use in the session I am about to start. But the only way of choosing is start the laptop up, and the last used thing will show up (as it should), then log out completely, and choose the other thing from the login menu.

I have spent a lot of my lifetime using Windows, and always I was asked a login BEFORE I actually could do anything. Now I think it is weird that anyone can log into a password-protected account without giving any passwords, as long as the last user was the Admin. Also: will logging out before shutdown help?

Here is my default.conf file.

Solution 1:

Try this. To disable autologin, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command below.

sudo leafpad /etc/lxdm/default.conf

In the fist few line, you will see something like autologin=username change it to the original state of # autologin=dgod. Save the file, and then reboot your machine.

Also try to go to System Settings --> Users and Groups, click on change next to Password

Make sure that the box is unchecked next to Don't ask for password on login

Try to edit sudo leafpad /etc/lightdm/lightdm.conf with these contents:

Remove or comment out the following lines

autologin-user=username
autologin-user-timeout=0

For 14.04 everything works. The /etc/lightdm/lightdm.conf doesn't exist in 14.04, but the other ways work. See image below:

Solution 2:

So I am using a Lubuntu 14.04.1 LTS installed on a USB stick. And this is how I managed to disable auto loging for Live Session User.

1. Create e new user (to use for loging): System Tools -> Users and Groups

2. Open console: System Tools -> XTerm

3. enter command:

   sudo leafpad /etc/lightdm/lightdm.conf
   

   the text editor should apear

4. replace line:

   autologin-user=lubuntu
   

   with

   autologin-user=name_of_user_you_created
   

   optional you could change line

   autologin-user-timeout=0
   

   to

   autologin-user-timeout=60"
   

5. save and close file

6. reboot

for more info access: https://wiki.ubuntu.com/LightDM

After power up you should see the login screen with the user you created waiting for password.

Atention: user "lubuntu" is still there but is not presented in the dropdown list. if you want to access it you need to chose other then insert user name by hand. Also leave blank for password as user lubuntu does not have a password by deault.

Solution 3:

Ubuntu / Lubuntu 20.10:

First edit

vi /etc/sddm.conf

It looks like this:

[Autologin]
User=<your_user>
Session=Lubuntu

I assume you can just comment out the entries:

[Autologin]
#User=<your_user>
#Session=Lubuntu

Adapt and reboot