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I am running Ubuntu 15.04, but I have had the problem since 14.04. When i start the computer, the login screen shows up but i don't need to enter my password to login. I also cannot lock the computer, the screen goes black until i move the mouse and then I am logged in again.

I tried using sudo passwd [username] and set password that way, but to no avail. Also I have deactivated the automatic login. During my latest try I installed a new greeter (lightdm-gtk-greeter) I do not know much about these but this method also led nowhere.

For some reason on this computer I have a keyring program that I do not have on my Ubuntu laptop.

Freece
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1 Answers1

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You may want to use sddm instead of light-dm. If you don't know how to do this:

    sudo apt-get install sddm
    sudo dpkg-reconfigure sddm && sudo reboot now

Then select sddm and hit Enter (or return) Now this keyring issue may also be a cause. Would you please leave a comment with name of the ring and maker?

David
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