Device freezes and restarts when audio, probably multiple, is played

[Andrew Hayzen]

I have a QML app with a WebView pointing to https://web.whatsapp.com/ with a custom UA specified below. A few times when this app has been focussed in the foreground, it has caused the whole phone to freeze and reboot.

It appears to be linked to receiving multiple messages at the same time, therefore causing 2 or more audible sounds to be created.

So far I have been unable to find any logs and fully reproducible steps, I will update the description if I do find more information.

$ system-image-cli -i
current build number: 142
device name: mako
channel: ubuntu-touch/rc-proposed/bq-aquaris.en
last update: 2015-10-22 07:50:36
version version: 142
version ubuntu: 20151022
version device: 20150911

$ apt-cache policy liboxideqtcore0
liboxideqtcore0:
  Installed: 1.9.5-0ubuntu0.15.04.1
  Candidate: 1.9.5-0ubuntu0.15.04.1
  Version table:
 *** 1.9.5-0ubuntu0.15.04.1 0
        100 /var/lib/dpkg/status

Web url: https://web.whatsapp.com/
Custom UA set to "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:41.0) Gecko/20100101 Firefox/41.0"

[Justin McPherson (justinmcp)]

Thanks for your report. Is the source of the app available? It will help with finding the problem. If not, some snippets, or a description of the method for launching the webapp and some details on the contents of the qml would also be welcome.

[Andrew Hayzen (ahayzen)]

@Justin, I've linked a branch with the source code, note that it has an unconfined apparmor profile, let me know if you need help installing (should just be able to open Qt Creator and deploy).

Also I have yet to experience this issue again, but it only occurred twice in one week before and I haven't had as many simultaneous alert sounds.

[Justin McPherson (justinmcp)]

Lovely code, thanks very much.

Unfortunately I am not able to replicate this one. A crash, system wide no less, is serious so I am not going to close the bug.

It's probably not an Oxide level problem, more likely an audio system issue.

More investigation is required.

[David Barth (dbarth)]

@Andrew, is that bug still affecting your app? Let us know so we can direct the issue to the right component. Most probably the audio sub-system.

[Andrew Hayzen (ahayzen)]

I haven't had this occur again, so I'm wondering if maybe it was a media-hub issue that has been fixed. Although due to it not happening all the time before, it is unclear if this has actually be fixed or just not reproduced again.

Maybe someone should just perform some simple stress testing of playing multiple audio tracks in the browser to be perfectly sure.

If I get this again I will post in a comment, otherwise feel free to invalid the bug.