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I am using Unity on Ubuntu 12.04. For some time now, the Applications lens is completely empty when I open it. If I search for any applications from the Home or Applications lens, no results show up. I have tried killing and launching the Applications lens as suggested at Launchpad, but it did not work. How can I get the applications lens to work again?

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A screenshot could be useful. Also try unity --reset and reboot. –  atenz Aug 8 '12 at 18:15
    
Thanks! Using unity --reset worked. Please post it as an answer so that I can accept it. –  Aaron Aug 8 '12 at 18:36
    
careful with that unity --reset. It killed my launcher, panel and window surrounds. –  comrademike Jan 9 at 13:49

4 Answers 4

up vote 9 down vote accepted

In the terminal try

unity --reset

and reboot to see the changes.

As far as the mentioned bug is concerned ,it was affecting the unity-lens-applications-5.8.0-0ubuntu1 (precise) package and current version stands at unity-lens-applications (5.12.0-0ubuntu1) .

It also states that fix is released so please update your system , if already up-to-date than ignore this.

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I know this has been fixed for the OP, but I had the same problem and it wasn't solved with the suggestions above. In the end I fixed with:

rm -r ~/.cache/unity && unity --replace &

My software centre was also broken and that was fixed with:

rm -r ~/.cache/software-center

From other posts I think the two may be connected hence posting both solutions together here for future searchers.

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You can also use the command

 unity --replace

and you don't need to reboot (more convenient). This command restart both Unity and Compiz and clean all the GUI like if she was restarted.

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I am not sure but I think at least one of the previous fixes changes unity settings, setting them to default settings. This may be necessary, but sometimes just a restart of unity has worked for me. From another askubuntu site I found that typing the following in a terminal will restart unity and recover my lenses:

unity &> /dev/null & disown
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