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Help! Have just downloaded beta1. All I did was open Firefox and now the Unity launcher and panel have disappeared. I'm now having to use the classic version of ubuntu as even after a reboot, Unity does not reappear :( Any ideas?

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All fixed. Ran CCSM and checked Unity plugin. Had somehow managed to disable itself! –  FlamePad Mar 31 '11 at 22:20
This sounds more like a bug report! Please use launchpad.net/unity/+filebug for bugs to allow them to be investigated and fixed. –  sladen Mar 31 '11 at 22:27
See also: askubuntu.com/questions/32937/… –  Russell Apr 1 '11 at 6:26
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closed as too localized by Jorge Castro, Marco Ceppi Jul 21 '11 at 15:01

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This is likely one of 2 things a compiz crash in which case a window should appear saying restart compiz or an issue with unitys config to fix both hit ALT+CTRL+F1 login and run unity then hit ALT+CTRL+F7

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Thanks. Like I said, I managed to fix it by running CCSM and re-checking Unity but I'll certainly give this a go if it happens again. –  FlamePad Apr 1 '11 at 9:07
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I had the same problem. This is what I did:

To get your menu bar back, change the login session to Ubuntu Classic; you can see this option in the bottom of the login screen, just when you are about to type your password.

After this, I have installed unity-2d and was able to use Unity. For this, when log back in select Unity-2d instead of Ubuntu Classic.

With Unity, you might need some getting-used-to, but IMHO, it is quite nice.

Hope this helps.

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