Comment 26 for bug 1477838

Because work on it has not completed in time for the milestone release.

On 21 March 2016 at 12:03, Dylan Coakley <email address hidden> wrote:

> Why is this bug being removed from the milestone?
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1477838
>
> Title:
> Crackling sound after playing audio and suspended
>
> Status in Canonical System Image:
> Triaged
> Status in pulseaudio package in Ubuntu:
> Confirmed
>
> Bug description:
> The Meizu MX4 is doing a weird "tic tic tic..." after receive a
> notification (from telegram, mail...) and it's suspended.
>
> ------
>
> When I press the screen lock button on the MX4 shortly after playing
> music or ending a phone call I hear a radio/fuzzy distorted noise
> coming from the phone. To make it stop I need to unlock and lock the
> screen again but this is not ideal.
>
> -----
>
> When the screen is locked and the playing song is finished and waiting
> for a stopped signal, MX4 will do a weird lower sound.
>
> -----
>
> TEST CASE (Thanks to Kamikaze)
> 1. Boot the device and wait until it suspends (black screen)
> 2. ssh to the device
> 3. Run from the command line:
> $ aplay /usr/share/sounds/alsa/Front_Left.wav
> 4. Repeat step 3 until you reproduce the issue (3 to 5 times)
>
> --- Original Case ---
> How to reproduce (Note this does not always work, the phone needs to be
> in some specific state yet to be determined)
>
> Ensure MX4 is not plugged into USB
> Call the MX4 and hear the ringtone
> Dismiss the call
> Push the power button to turn off the screen
> Tick Tick Tick
> Push the power button to turn on the screen
> hissing
> Push the power button to turn off the screen
> Tick Tick Tick
> etc
>
> It will not clear until you play another sound
> Does not happen in silent mode of course
>
> ------from the dupe ----
>
> Aquaris E4.5
>
> Steps to reproduce:
>
> 1. Start playing a podcast.
> 2. Switch to a different app.
> 3. Lock the screen.
> 4. Wait for the Podcast to finish.
> 5. Wait a bit longer.
>
> Expected results:
>
> No noise from speaker.
>
> Actual results:
>
> Soft white noise from speaker. It seems that some part of the audio
> subsystem is still switched on. I am concerned that this could be
> draining battery.
>
> Workaround:
>
> After the Podcast finishes, unlock the phone and switch back to the
> Podbird app. This causes the noise to stop.
>
> Comments:
>
> I noticed the same soft white noise continues a second or two after
> the phone plays any sound from any app, but then turns off. I presume
> there is some time out turning off some part of the audio subsystem.
> Presumably if there is a reason, it should happen even when the app
> causing the sound to play is not active.
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/canonical-devices-system-image/+bug/1477838/+subscriptions
>