@Maurizio,
Could you check if https://code.launchpad.net/~seb128/unity-control-center/backport_display_callback/+merge/291829 is working for you?
@Maurizio,
Could you check if https:/ /code.launchpad .net/~seb128/ unity-control- center/ backport_ display_ callback/ +merge/ 291829 is working for you?