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I have just installed the gnome-shell on my ubuntu 12.04. When I login I get this error:

GLib-GIO-ERROR: **: Settings schema ''
does not contain a key named 'invert-lightness'

Does anyone know how to fix this? Because of this error the gnome-shell doesn't start at all!

When I installed it I followed these instructions:

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Try adding it manually:

gsettings set invert-lightness false

And report back for further errors.

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I had the same problem. What solved the problem was to reinstall the gsettings schemas:

sudo apt-get install gsettings-desktop-schemas
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