This note was written while using Ubuntu 10.10. However, it might apply to other versions as well.
Symptoms: After a number of shenanigans involving configuration, I found myself unable to login to the desktop, in Ubuntu. The login screen (GDM) offered my user name. However, once my user name was selected, no session were offered. Entering my password and pressing the login button would show a brief blank screen and then return me to the login screen.
Cause: Somehow, the gnome-session was removed from installation.
Solution: Re-install gnome-session
Here is the recipe:
- At the login screen (GDM), press the key combination CTL-ALT-F1. This should drop you out of GDM and into a terminal screen
- Login to the terminal using your username and password
- At the prompt, enter the command “sudo apt-get install gnome-session”
- Then, “sudo reboot”
If the gnome-session was already installed and you get an error attempting to install it again (or the answer “gnome-session is already installed”), then reconfiguring it might suffice: “sudo dpkg-reconfigure gnome-session”