Comment 2 for bug 1753233

I have tried the following without success:

- chown maroual:maroual .Xauthority (as it was owned by root)
- rm .Xauthority and then reboot
- I have verified that the umask and owner of /tmp and /home/maroual were correct
- sudo dpkg-reconfigure lightdm
- sudo apt-get install --reinstall ubuntu-desktop
- apt-get update then upgrade then autoremove then check
- inspected the following files and logs:
.xsession-errors
  /var/log/Xorg.0.log
  /var/log/Xorg.0.log.old
  /var/log/lightdm/seat0-greeter.log
  /var/log/lightdm/x-0.log
  /var/log/lightdm/lightdm.log
  journalctl -u lightdm
  systemctl status lightdm.service
  dmesg

sudo service lightdm restart just allows me restoring the login screen after a failed attempt

Thanks for your help