Comment 14 for bug 1283826

Hi, I got a similar problem today after running
> apt-get dist-upgrade
to upgrade to 14.04.

After running it my desktop cannot show up when reboot.
However, I found I can still use Cirl+Alt+F1 to go to tty1 and login using my user account with root privilege.

Then I solved the problem and get my desktop back by running
> apt-get install ubuntu-desktop lightdm

It seems to me the package lightdm has been removed during the dist-upgrade. I don't know what happened though.