Ubuntu returning to login screen, Ubuntu Login loop

 

If you are having login problem in ubuntu, for example if you are putting your password and login screen coming again and again then just try following solution.

sudo apt-get install --reinstall xorg

/home/<username>/.XAuthority*    <—The user name which is not able to login.

then restart the system.

 

and if above does not work try following

switch to shell (Ctrl+Alt+F1) you can use <F1 to F6 in place of F1>

logged in as the user

cd /home/user 

sudo mv .Xauthority .XauthorityBak

sudo reboot