Questa è la risposta dal forum internazionale:
you can safely ignore this warning (at least to my knowledge and past experience). I do not know why this LVM metadaemon is installed and active by default, for desktop systems it does not make much sense not even if you actually use LVMs for your partitioning setup (As I do). I received the same warning after my first install of Sabayon and I asked a Linux sysadmin about it, who told me that this daemon is meant for large scale Linux environments (clustered file systems above all) to monitor whether all volume groups and logical volumes in use work flawlessly. For a desktop system this is total overkill.
In case you still get this warning after install, for example when checking partitions or tinkering with them, you can either deactivate the daemon in /etc/lvm/lvm.conf or simply remove the lvmmetadaemon via the package management, I do not see why one would need this on a desktop system (But I may be wrong of course!)