It happened to me also when I upgraded from 12.04 --> 14.04 --> 14.10. It occurred after the second update (to 14.10). The solution from comment #9 fixed it.
-- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1166765 Title: unity showing only blank desktop, no dash nor decorations To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1166765/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : [email protected] Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp
