The main culprit is the media-hub state machine that handles media player state transitions which acquires or releases display locks. See https://code.launchpad.net/~albaguirre/media-hub/fix-1368786 for details.
** Changed in: media-hub Status: Confirmed => In Progress -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1368786 Title: Screen doesn't blank - krillin #32 Status in Gallery App: Invalid Status in Media Hub: In Progress Status in Unity System Compositor: In Progress Status in “unity-system-compositor” package in Ubuntu: In Progress Status in “unity8” package in Ubuntu: Invalid Bug description: rumor has it this does _not_ occur on n4, only krillin & flo I think this may have been a problem for a couple of images, not sure. My phone is set to auto lock after one minute. Sometimes my phone display doesn't lock at all. If booted from cold it seems to fairly reliably lock. Not sure if something I do later is triggering the fault. To manage notifications about this bug go to: https://bugs.launchpad.net/gallery-app/+bug/1368786/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp