STR: 1. Set alarm in Clock app. 2. Play music in Music app. 3. Alarm is ringing. Excepted result: Alarm is playing, but music is not. Actual result: Alarm and music are playing at same time.

Looks like it is a gecko bug related with [1]. After applying the [2] patch and do the STR, you could see the below log. ``` I/GeckoConsole( 4261): Content JS LOG: bug 1181982: Music registers audio channels I/GeckoConsole( 4261): Content JS LOG: bug 1181982: audioChannels: [object BrowserElementAudioChannel],[object BrowserElementAudioChannel] I/GeckoConsole( 4261): Content JS LOG: bug 1181982: Clock registers audio channels I/GeckoConsole( 4261): Content JS LOG: bug 1181982: audioChannels: [object BrowserElementAudioChannel],[object BrowserElementAudioChannel] I/GeckoConsole( 4261): Content JS LOG: bug 1181982: clock.gaiamobile.org registers audio channels ``` The alarm attention window cannot get the `allowedAudioChannels`. Then the Audio Channel Service[3] cannot manage it. That's the root cause of this bug. [1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1183301#c9 [2]: https://github.com/evanxd/gaia/commit/f38de9dfec23929ab4cd22ff733c67911676484d [3]: https://github.com/mozilla-b2g/gaia/blob/master/apps/system/js/audio_channel_service.js

Treeherder: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=61ed5e9b0ec095684e23501afad9f6b1b33bc20f

Discussed with Kan-Ru and Alastor offline, we need to wait for mozbrowserloadend to get allowedAudioChannels from browser element.

Patch is ready for review. But need a reviewer.

Comment on attachment 8634629 [details] [gaia] evanxd:bug-1181982 > mozilla-b2g:master Hi Dominic, Could you help to review the patch? Thanks.

Comment on attachment 8634629 [details] [gaia] evanxd:bug-1181982 > mozilla-b2g:master Looks like we have to wait for mozbrowserloadend then can get correct allowedAudioChannels for app windows, and the patch does the right thing so looks good to me.

Dominic, thanks for the review. But the patch causes some Gij failures, go fixing the tests.

First step, restart all treeherder tasks. The treeherder: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=ae307813f5a5fa988cb1044a285d82f32f4355c6

Still had Gij failures[1]. Fixing them. [1]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=5132a9c656c9bb3e23ac09e3f23cfd28c1cb8f83

New treeherder: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=03a11aa4495a2063d7ae3c447c94506751890ea9

This bug can solve the problem that we can't manage the sound of the attention window. For example, the alarm starts.

Patch[1] to fix unit tests. Check the treeherder[2]. [1]: https://github.com/evanxd/gaia/commit/97e6d42ac48f3cc6d42f6391bff4f14a9ef0b3da [2]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=97e6d42ac48f3cc6d42f6391bff4f14a9ef0b3da

Update patch[1], and the treeherder[2]. [1]: https://github.com/evanxd/gaia/commit/e1d6902585bb6e20d9d392af832e543b1f5bd844 [2]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=e1d6902585bb6e20d9d392af832e543b1f5bd844

Two more tries[1][2]. [1]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=9e649d536d1b3f1d8d569053de547c05f3c3f1c9 [2]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=1f00659fe1554e2bbb7e0f92d6b9e9e59f07aa51

Carrying over the flags from dupe (bug 1186050)

new treeherder: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=7b224c6c1af138b46e8f9a68482db214826248b7

new try[1][2] [1]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=cf8d1195301f11ad4d5a01ce16957cf4bace173e [2]: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=dfb746dbbfaff5202d33d6f0d4db66e646cdddee

new try: https://treeherder.mozilla.org/#/jobs?repo=gaia&revision=2ef4fae9ea093d13664b6c9fc3a21d223acb7c0a

master: https://github.com/mozilla-b2g/gaia/commit/2ae9a4c6fa09567dd079a0907e35673f1813e402

This issue is verified fixed on the latest Spark 2.5 build. Alarms properly pause playing music before audibly sounding themselves, then un-pause the music when the alarm is dismissed. Environmental Variables: Device: Aries 2.5 Build ID: 20150724113133 Gaia: db299103dd17a873cba4ff88e62ec173bf80fe62 Gecko: 9bca608ab65a Gonk: 2916e2368074b5383c80bf5a0fba3fc83ba310bd Version: 42.0a1 (2.5) Firmware Version: D5803_23.1.A.1.28_NCB.ftf User Agent: Mozilla/5.0 (Mobile; rv:42.0) Gecko/42.0 Firefox/42.0