I have read several threads about this but I am not sure mine is the same issue. I find that several times throughout the day my lockscreem timeout reverts from 2 minutes to 15 seconds. This seems to happen every time I ran any app. Is this a glitch because if it was by design they why bother to put a setting to allow us to change it? I know about Keepscreen but that seems a silly answer to an issue that shouldn't be occurring. Ideas? Thanks!