Comment 25 for bug 1620553

Landing:https://requests.ci-train.ubuntu.com/#/ticket/1930
I verified vivid debian package on below images by creating 6 simultaneous alarms that will ring one minute later.
current build number: 827
device name: krillin
channel: ubuntu-touch/rc-proposed/bq-aquaris.en-proposed
last update: 2016-09-09 23:42:32
version version: 827
version ubuntu: 20160907
version device: 20160606-ab415b2
version custom: 20160831-991-38-18