mozilla-b2g/gaia — pull request #21465 by robertbindar (2014-07-07 21:07:30+00:00)
Title: Bug 1030310 - [B2G][Email] Device does not vibrate upon receiving an email notification while in sleep mode

Since the vibration would drain the battery of a frequently emailed user, the device shouldn't vibrate at all in the case where the screen is off.