the problems seems to be related to the package appmenu-gtk, removing that package solves the problem. probably this bug is a duplicated of https://bugs.launchpad.net/ubuntu/+source/appmenu-gtk/+bug/593474
the problems seems to be related to the package appmenu-gtk, removing that package solves the problem. probably this bug is a duplicated of https:/ /bugs.launchpad .net/ubuntu/ +source/ appmenu- gtk/+bug/ 593474