Stop auto-login

I have Cinnamon installed. When reboot or launch after shutdown I don’t have to type in a password. I would like to change that. I found an answer here, but that applies to lightdm.

How can I find out if I am running lightdm or sddm?
If I am running sddm, how do I stop auto-login?

There might be other ways to find it out as well, but the following two command lines should tell what display manager you are using:

systemctl status display-manager


grep 'ExecStart=' /etc/systemd/system/display-manager.service

If I remember correctly Cinnamon uses LightDM.

1 Like

Your memory works pretty well :grinning:: I am on lightdm.

Here is the output from the 1st command:

systemctl status display-manager
● lightdm.service - Light Display Manager
     Loaded: loaded (/usr/lib/systemd/system/lightdm.service; enabled

and this is the output from the 2nd command:

grep 'ExecStart=' /etc/systemd/system/display-manager.service

Both refer to the/usr folder, although the 1st mentions subfolder lib, while the 2nd one mentions subfolder bin.

And in the article I linked to they mention /etc/lightdm/lightdm.conf.

Before raising this issue I had checked if /etc/lightdm/lightdm.conf was present on my system, as is autologin-user = <my username>.

So, can I then just comment out the line in the /etc folder?
And what about the /usr folder and its subfolders?


You don’t need to touch anything there. /usr/bin/lightdm is just the binary that runs the display manager.

Have a look at the following for some info on Linux Filesystem Hierarchy:

1 Like

Good info, thanks a lot. You provided the answer. Many thanks, once again. :pray:


This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.