Comment 18 for bug 973993

Fresh, standard install of Ubuntu 12.04. Nothing encrypted. The system was both installed and updated today.

I enter a password and it says "Logging in". It then stays like that.

You can use the up and down arrow keys which seems to interrupt the login process, but also prevents you from typing anything into the password boxes. The only thing you can do is reboot the machine and try again.

I went into a shell using Ctrl+Alt+F1. I then had a look at the /var/log/lightdm/lightdm.log log file and the logging also appears to be stuck. The last thing I see is

[+8.02s] DEBUG: Authenticate result for user mendhak: Success
[+8.03s] DEBUG: User mendhak authorized

I have attached my lightdm log file. Anything after the 8second mark is when I rebooted the machine.

I also tried reinstalling the greeter and rebooting.

    sudo apt-get install --reinstall unity-greeter
    sudo dpkg-reconfigure lightdm

But this had no effect. Still could not log in.

**WORKAROUND**

I noticed that GDM lets you log in.

    sudo apt-get install gdm
    sudo dpkg-reconfigure lightdm

Then from the options, select gdm and reboot the machine.