Good evening Kali Linux users. Everything was going well with your Kali Linux( 1.1.0 to rolling ), you updated(apt-get update) and when you rebooted you got struck at Login screen. No matter how many times you entered your credentials correctly you are once again presented the login screen as shown below. Today I will show you how to fix Kali login error for good. I tested this howto on the latest rolling version.
At the login screen, hit CTRL +ALT+F1 or F2. When you get the terminal, login with your credentials. Type apt-get update as shown below.
Next type apt-get upgrade -y. The system will upgrade and the screen will look like below. Have patience as it will take some time.
After the upgrade is over type command “apt-get install -f gdm3“. When it prompts if you want to continue, type Y. After this operation, reboot the system. You should be able to login normally without any problems. Hope that was helpful.