Screen doesnt lock on timeout 12.10

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http://askubuntu.com – The system wont lock after 10 minutes of inactivity . The key combo locks system properly . If its suspended on timeout it and awakened it will display a lock screen , but if I have lock set for 10 mins of inactivity it doesnt lock or lock after screen goes to sleep , if i set locking after moinitor sleep . (HowTos)