Ubuntu 12.04 problem: top panel and launch pad disappeared after compiz configuration

[Johnny Rosenberg]

2012/2/19 Ren Wen shan <renws1990 at gmail.com>:
> Hi,
>
> I installed Ubuntu 12.04 from DVD (daily build Feb-14th) on my iMac last
> night and everything seems fine.
>
> However, I activated "desktop cube" and "rotate cube" (as a result, disabled
> "desktop wall"), after that, top panel and launch pad suddenly disappeared.
> Now I've disabled "desktop cube" and "rotate cube", but it didn't bring top
> panel and launch pad back.
>
> If I log in as "Ubuntu 2D" mode, everything is fine.
>
>
> Does anyone have the same problem?
>
>
>
>
>
> Regards,
> Wenshan

I have Ubuntu 10.10 myself so I don't know, but maybe this link will
give you a clue (for a workaround) even though it is a bit old by now:
http://reformedmusings.wordpress.com/2011/05/05/howto-get-the-compiz-desktop-cube-in-ubuntu-11-04-natty-and-unity/