Solved. In fact it was a conflict with an old repository that I used to get Compiz plugins on Gusty: the packages of the repository had the same name that these on the Hardy repository so after the update compiz was not able to deal with both of them. After Compiz purged and the extra repository removed, I reinstall Compiz I have no more problem. Not a Ubuntu issue, set to invalid.
** Changed in: compiz (Ubuntu) Status: New => Invalid -- Some Compiz features/plugins cannot be activated https://bugs.launchpad.net/bugs/218608 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs