La tastiera del mio mac book pro dopo l,aggiornamento a yosemite si illumina solo dopo il login

buongiorno
La Tastiera del mio mac DOPO l, aggiornamento a yosemite SI illumina  solo DOPO il login
grazie a tutti
Message was edited by: augusto zizi  le modifiche le ho apportate io personalmente

buongiorno , ho risolto il problema disattivando
FILEVAULT         GRAZIE  GRAZIE

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    FILEVAULT         GRAZIE  GRAZIE

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