Wake lock / CPU / Music issues when sleeping.

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I'm having some real trouble with music on ICS, when the screen is switched off.

Here are the conditions:

1. My app uses a MediaPlayer to play music.
2. My app holds a PARTIAL_WAKE_LOCK to keep the CPU awake.
3. I'm running a foreground service. It is very interactive with the user (via TTS and music) for about 30 mins. Mustn't be killed, and is tracking GPS updates and doing lots of stuff.

When the screen is switched off with the power button, the music starts to stutter. Not ALL tracks, but I've found a few with a 320 bitrate that have this issue.

I've noticed some interesting stuff.

When the screen is on:

(first line is the media service, second is my app.. they are the top 2 processes)

PID PR CPU% S #THR VSS RSS PCY UID Name
119 0 6% S 12 45484K 5780K fg media /system/bin/mediaserver
8852 1 4% S 23 493580K 65700K fg app_98 com.rundouble.companion


(When the screen is turned off (and the stuttering starts)

PID PR CPU% S #THR VSS RSS PCY UID Name
119 0 5% S 12 45484K 5780K fg media /system/bin/mediaserver

My app drops right off the screen (down to 0%) which I don't understand because I have a wake lock. But also the mediaserver reliably and reproducably drops to 5%. I suspect this is related to the stuttering.

Now, in the Google Music player the SAME HAPPENS, unless I turn on the "Sound Effect" option. However, I don't have API access to this from my app, so I can't turn it on. However, the fact that the Google Music app does the same suggests this is a bug with the MediaPlayer.

Any Ideas?

Thanks

Martin

Hmm,

Posting in the correct area is a good start!

What rom & radio are you using?

If you're using 350mhz as minimum frequency can you turn it up to 500mhz and see if it helps anything?

The same thing is happening to me when I was listening to music the other day, using PowerAMP. Moment the phone goes to sleep, the music starts stuttering. Annoying.

If you have the option turn off the auto buffer and set it to huge or large. This solved my problem with poweramp. Google music player does not have this issue.

Sent from my Galaxy Nexus using xda premium

Moved to General

Originally Posted by xHausx

Moved to General

Um, this guy is developing an app. Doesn't seem like it belongs lost in the general BS of general. He's obviously a dev asking dev advice. Use open eye method of reading

Originally Posted by @rbiter

If you have the option turn off the auto buffer and set it to huge or large. This solved my problem with poweramp. Google music player does not have this issue.

Sent from my Galaxy Nexus using xda premium

Didn't solve the problem for me.

Will try again with the latest build..

Originally Posted by @rbiter

If you have the option turn off the auto buffer and set it to huge or large. This solved my problem with poweramp. Google music player does not have this issue.

Sent from my Galaxy Nexus using xda premium

I have this issue with the goole music app as well, only on certain tracks though...dunno whats goin on

Originally Posted by Superfrag

The same thing is happening to me when I was listening to music the other day, using PowerAMP. Moment the phone goes to sleep, the music starts stuttering. Annoying.

I get this aswell... there is a buffer option in poweramp which I've not tried yet... glad I'm not the only one though