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I followed the instructions in How to set a PIN password or a short password in Ubuntu Linux to make my life easier, but apparently it didn't made my life any easier:

Now I can't login to my Ubuntu 18.10 desktop environment even with my own PIN password that I set up.

what should I do now?

Fabby
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1 Answers1

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The instructions in the tutorial that you followed are out-of-date because the default login display manager in Ubuntu 18.10 is gdm3, not lightdm. Uninstall the packages that you installed by following the instructions from How to set a PIN password or a short password in Ubuntu Linux, and reinstall the default login display manager (gdm3).

Access a virtual console by pressing the keyboard combination Ctrl+Alt+F3 from the screen where the system is stopped when trying to boot the computer.

To login from a virtual console:

  1. At the login: prompt type your username and press Enter.

  2. At the Password: prompt type your user password and press Enter. After you have logged in, you can run commands from the virtual console.

Run the following commands. 

sudo apt purge libpam-pwdfile lightdm    
sudo apt install gdm3   
sudo dpkg-reconfigure gdm3    
sudo reboot

sudo dpkg-reconfigure gdm3 will open up a new window allowing you to select gdm3 as the default login display manager. Use the arrow keys to select gdm3 and press the Tab key to put the focus on <OK> and press Enter. Then reboot by running this command: sudo reboot

karel
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