After system upgrade to 13.10 there is no GUI at startup. I can login successfully and
start lightdm, but it should be done automatically.
I tried following these instructions and did:
cat /etc/X11/default-display-manager(output: /usr/sbin/lightdm)
sudo dpkg-reconfigure lightdm
gedit /etc/init/lightdm.confand before command
Nothing seems to help the situation. How can I fix or debug this?