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I updated my Ubuntu and while it was restarting command line appeared and froze, then I forced shutdown PC and when Ubuntu booted again, I saw unity is corrupted. Launcher and menus disappeared but Alt+Ctrl+T and Righ-Click menu works. Also I can open Firefox and other apps through terminal. This is how my current desktop:

enter image description here

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which version of Ubuntu are you using – 3bu1 Jun 5 '13 at 13:09
up vote 1 down vote accepted

Reset Compiz configurations

dconf reset -f /org/compiz/

Try to completely remove your ATI drivers from your system:

sudo apt-get purge fglrx*

Remove your xorg.conf

sudo rm /etc/X11/xorg.conf

Reinstall xorg completely

sudo apt-get install --reinstall xserver-xorg-core libgl1-mesa-glx:i386 libgl1-mesa-dri:i386 libgl1-mesa-glx:amd64 libgl1-mesa-dri:amd64

Re-configure Xorg

sudo dpkg-reconfigure xserver-xorg


sudo reboot

by Bruno Pereira

Now you should reconfigure Unity. It will remove Unity completely.

sudo apt-get install ppa-purge
sudo ppa-purge ppa:unity-team/staging
apt-get install unity

Install Unity again.

sudo apt-get update
sudo apt-get install --reinstall ubuntu-desktop
sudo apt-get install unity
sudo reboot

by Justinas Dūdėnas and mpm

It works for me just great.

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For 12.04 and older:

unity --reset

run this command it will fix the problem,but not perfectly,running unity --reset will reset all of the launcher options, but it won't remove your custom favorites. To also remove any launchers you've added to the launcher, run

unity --reset-icons

Or manually by:

gsettings reset com.canonical.Unity.Launcher favorites

I would recommend running the gsettings command before unity --reset, so that you won't have to restart unity for the gsettings key reset to take effect.

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--reset is now deprecated.. – Ionică Bizău Nov 7 '13 at 17:07

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