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I have a very big problem. I just installed cairo-dock and I logged out from my Unity.

As I logged out, Ubuntu showed me options to select other desktop, I saw an option of Cairo Desktop and I chose it and logged in. But since I logged in, it just shows me a black screen.

I don't be able to do anything! I do not see anything on the screen, can't even open terminal. Keyboard has stopped working and mouse pointer is not visible!

There is no option to logout. I'm in a big trouble. When I press power key of my laptop, it shuts down but when I start it again, it shows me black screen only.

I want to switch to Unity environment back. Is there any option? I don't want to format my computer.

I use Ubuntu-14.04.1.

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2 Answers 2

Reset to default
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Try to open a TTY by using Ctrl+Alt+F1 and login with your username and password. Restart LightDM by typing:

sudo service lightdm restart

You should get in the login screen, where you have to choose Unity. When logged in with Unity session, you can use the terminal or return to the tty and delete the package by using:

sudo apt-get remove --purge cairo-dock

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  • My keyboard has stopped working!! And Im quitting ubuntu. Windows with viruses is lot better than ubuntu with bugs.
    – Apurva
    Jan 27, 2015 at 4:55
  • You can execute the commands from recovery mode and you should report a bug at Launchpad. When you get a buggy package or your computer isn't powerful enough you may have problems
    – aastefanov
    Jan 27, 2015 at 7:51
  • You could also purge cairo-dock before restarting lightdm.
    – jpaugh
    Nov 28, 2017 at 20:25
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  1. Ctrl+Alt+F1
  2. login and password
  3. sudo apt-get purge cairo-dock
  4. sudo reboot
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  • My keyboard has stopped working!! And Im quitting ubuntu. Windows with viruses is lot better than ubuntu with bugs.
    – Apurva
    Jan 27, 2015 at 4:56

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