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Please help me reset or reinstall Unity. I've already tried everything here as well as apt-get update and upgrade. My system entered this state after I re-installed the OS (12.04) in the hopes of curing its instability.

Purple Launcher, empty title bar

The curious thing is that Unity works if I go through recovery mode followed by resume.

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  • Have you tried unity --reset?
    – Mitch
    Sep 6, 2012 at 18:07
  • And a LOT more. Please refer to link in question.
    – Emre
    Sep 6, 2012 at 18:08

2 Answers 2

Reset to default
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Try this. Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the commands below.

sudo apt-get purge unity && sudo apt-get install unity

Reboot your system.

If the above does't help, try

sudo apt-get install --reinstall ubuntu-mono ubuntu-minimal ubuntu-desktop unity unity-common unity-2d
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  • No change. Maybe some logs would help?
    – Emre
    Sep 6, 2012 at 18:14
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The problem was the simultaneous use of three video outputs (HDMI, VGA, and DVI) when only two can work at a time. I simply removed one of them and it booted right back up. Now that it is working I can re-attach all three and choose which two I want from the display settings.

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