Eu instalei o Pantheon Desktop no meu Ubuntu 14.04, conforme descrito em Este guia , mas quando eu fizer login com o Pantheon, o painel não aparece:
I installed Pantheon desktop in my Ubuntu 14.04, as described in this guide, but when I log in with Pantheon the Panel doesn't appear:
Yes, you no longer have the Ubuntu UI (called Unity), but the Pantheon UI. And the Pantheon UI has no Unity-panel. So what you see now is absolutely normal.
To revert back follow the steps in the link you used to install Pantheon in reverse order, then go here: How do I reinstall Unity? and your Unity-panel will re-appear!