Audio capture (Yocto Fido, kernel 3.18) issues - channel swapping

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Audio capture (Yocto Fido, kernel 3.18) issues - channel swapping

Akram Hameed
Hi folks,

We've been transitioning to the 3.18 linux-gumstix kernel over the past couple months. I've run in to a fairly serious roadblock: our platform samples audio continuously and analyzes it. Using the new kernel, I can capture audio (using alsa) but after an undefined period of time - could be minutes, or hours, the system will swap audio channels. 

This occurs even if I am recording from only one channel - I just get empty processor noise picked up on the recording channel.

I am concerned it might be related to this: http://www.spinics.net/lists/linux-omap/msg88857.html

Any thoughts? If the Overo series can't even record audio continuously, that's a pretty big issue with the TWL4030 driver...

Cheers,

Akram

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Re: Audio capture (Yocto Fido, kernel 3.18) issues - channel swapping

Akram Hameed
In addition, I found this which also appears relevant: http://comments.gmane.org/gmane.linux.alsa.devel/82178

On Sat, Jul 9, 2016 at 9:16 PM, Akram Hameed <[hidden email]> wrote:
Hi folks,

We've been transitioning to the 3.18 linux-gumstix kernel over the past couple months. I've run in to a fairly serious roadblock: our platform samples audio continuously and analyzes it. Using the new kernel, I can capture audio (using alsa) but after an undefined period of time - could be minutes, or hours, the system will swap audio channels. 

This occurs even if I am recording from only one channel - I just get empty processor noise picked up on the recording channel.

I am concerned it might be related to this: http://www.spinics.net/lists/linux-omap/msg88857.html

Any thoughts? If the Overo series can't even record audio continuously, that's a pretty big issue with the TWL4030 driver...

Cheers,

Akram


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Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San
Francisco, CA to explore cutting-edge tech and listen to tech luminaries
present their vision of the future. This family event has something for
everyone, including kids. Get more information and register today.
http://sdm.link/attshape
_______________________________________________
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