I've been using 14.04 for a while and everything seems running smooth,until last night I downloaded updates.Afterwards I restarted and a message like a reminder or new email type message popped up saying I was locked out of my account(I was online and I think the message revered to my email or Ubuntu one account,sad to say It would only go as far as the login window after which it hangs with my screensaver.I am new to ubuntu and don't know the terminal so good,the tty I get to when pressing ctrl + alt f2 can't log in either,it says login incorrect.I can only get in when I drop to the shell in the grub recovery menu.Can somebody talk me through a procedure.
答案1
To Get a Terminal that isn't graphical:
Ctrl+Alt+F2
To kill Xorg all together while you troubleshoot, in the terminal window after login type
sudo systemctl stop gdm (GNOME/Unity)
sudo systemctl stop kdm (KDE)
To revert packages, see this Forum Post. It may not be a package, so:
nano -w /var/log/XOrg.0.log to see if the last successful X Server completeted.