I have just installed ubuntu 11.04 on my ACER 3810T.
Unity is showing only few launchers in the sidebar and the "Applications" launcher is not there. More, if I press Alt-F", not windows (lens) comes up.
Where should I troubleshoot this?
Thanks
PS: Video card: Intel mobile 4 Series Chipset
The two launchers wEre not showing in the sidebar because the following packages were missing in the system: unity-place-files and unity-place-applications.
It was just a matter of installing them, login back and the launchers appered!
Can you open up a terminal session? If so try typing in:
This will reset Unity to its default settings and hopefully resolve the issue you're having.