I tried doing Ctrl+Alt+F1 but I cannot login since every time I type at the password field no characters are being input or I just got the wrong username password.
How do I solve this?
I've checked in French Ubuntu forums, unfortunately to no avail for me, and for some this did work:
You need to verify that your /home/$USER/.Xauthority file is not owned by root.
You can simply check that with ls -ld .Xauthority (assuming you are in the home directory) and revert it back with
sudo chown $SUDO_USER .Xauthority
Let me know if that helped. I had to reinstall from scratch.
I got the problem after I removed GDM. (Running 12.04 with Openbox.) I solved it by pressing Ctrl+Alt+F2 to another console and reinstall it.
Should it realy be $SUDO_USER or am I supposed to replace it with my username for example? Well, it didn't work anyway. On the other hand, I didn't try very hard.
At login: Ctrl+Alt+F1
sudo chown -R $USER:$USER $HOME
Ctrl+Alt+F7
Enter your password and login. Worked for me.