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Unity 3D was working just fine till we had a blackout in the area (I have not yet bought a UPS :().

I tried the solutions here, but it does not help. I tried issuing a unity --reset and it gives me this output: http://pastebin.com/UW83w5cG

What seems to be important (to me) from that log is this part:

(compiz:6510): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed

ERROR 2012-05-29 21:50:41 unity.launcher.trashlaunchericon TrashLauncherIcon.cpp:62 Could not create file monitor for trash uri: Operation not supported

For the time being, I can use Unity-2D, but I would like the 3D to work as well. Can you please help?

Edit: Output when issuing $ unity --replace: http://pastebin.com/sBCPbyrT

(compiz:2811): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key             (dirname, NULL)' failed
ERROR 2012-06-01 20:21:24 unity.launcher.trashlaunchericon TrashLauncherIcon.cpp:62 Could not create file monitor for trash uri: Operation not supported
Initializing unityshell options...done
WARN  2012-06-01 20:21:25 unity.screeneffectframebufferobject ScreenEffectFramebufferObject.cpp:167 unsupported internal format
Segmentation fault (core dumped)
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2 Answers 2

Turns out it was quite simple; I did a $ sudo apt-get purge compiz and $ sudo apt-get install unity ubuntu-desktop (which installed compiz again) and now I can successfully log in.

Edit: After a restart I have the same symptom; so this is not the right solution.

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up vote -2 down vote accepted

I finally gave up on Unity and instead installed gnome-shell; it's awesome!

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