Comment 11 for bug 1281323

Don't know if this has actually been fixed totally - but I have found that if you simply remove light-locker (sudo apt-get remove light-locker) then go into the Preferences > Default application for lxsession and turn off Screen Locker it no longer locks the screen after 10 minutes. - so far it's been running for over and hour now without blanking and locking the screen.