ALSA troubleshooting grid

Stable: 22.11.2019 - 14:17 / Revision: 26.09.2019 - 13:39

I am here to prevent the first-page-empty bug!

Some typical issues related to the ALSA framework are listed below. Solutions or debugging methods are proposed for these issues.

If your issue is not listed, try also looking in the articles in the ALSA or troubleshooting grids categories.


Symptom Resolution 
aplay: pcm_write:2030:
write error: Input/output error

This error occurs on an audio playback, when audio samples are not output. A possible cause is a wrong configuration of the audio interface:

- DAI gpios not activated: missing in DT or in bad state
- DAI/codec not clocked: kernel/master clock not enabled

Refer to Soundcard configuration 

Error -16 setting sai_ck parent clock.
Active stream rates conflict

The two SAI sub blocks which are connected to the audio codec, share their master clock on Disco and Evaluation boards. When running both capture and playback on the codec, the chosen sampling rates must be multiple of each other, because of this dependency. If sampling rates are not compatible, an error is issued.


Digital audio interface

Device tree

Serial audio interface (Mechanism used to transfer non-buffered audio data between processors and/or audio converters.)

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