How to get rid of Login Screen Loop in Ubuntu ?

Login Screen Loop is no new issue in Ubuntu Platform with the latest LTS version 18.04 have been reported to have such issues.

First of all why such problem arise ? The answer is quite simple — it could be the reason of a faulty Nvidia/AMD installation , it could be from an unfinished software update or it could be something weird like PATH errors in the system( happened to me 😥 ).

Most importantly we need which errors are causing the loop. For that we need to go into the terminal mode . It can be done by pressing Ctrl+Alt+F1 or Ctrl+Alt+F3. After logging into the terminal type :

cat .xsession-errors

I will be suggesting 4 methods to get the problem solved.

Method 1 :

1. Run ls -ld /tmp . You should check for the first 10 letters. It should be the way as given.

ls -ld /tmp
drwxrwxrwt 15 User User 4096 May 11 12:21 /tmp

2. Change the permissions.

sudo chmod a+wt /tmp

Method 2 :

1. Reinstalling Ubuntu lightdm.

sudo apt-get purge lightdm
sudo apt-get install lightdm
dpkg-reconfigure lightdm

2. Now reboot your system.

Method 3 :

It involves changing .Xauthority file in the system. It’s a file found in each users home directory that is used to store credentials used by xauth for authentication of X sessions. Usually it simply holds an authentication “cookie” . Follow here to know more about it.

1. Run ls -lah. Look for the line that ends with .Xauthority

ls -lah
-rw-------  1 User User  51 May 11 13:55 .Xauthority

2. Now we need to chown.

chown username:username .Xauthority

3. Try renaming it. Reboot your system after that.

mv .Xauthority .Xauthority.bak

Last method :

I guess everybody knows what gonna be the last solution. Cheers!! you were right. Reinstall your system 😅… which i did in my case because i messed up my Path variables while installing Apache Maven.

I hope you got your problem solved !! 😀😀