i've ubuntu 13.10 , when i write my password , ubuntu wait for 3-4 seconds and then show the login page again this error didn't happen after updates, i'm still working to find many solutions but they were all not working that was one of them: Press Ctrl + Alt + F1 Login Install GDM:
sudo apt-get install gdm
Make GDM the default:
sudo dpkg-reconfigure gdm
Reboot your machine
please anyone can offer some help ??