[alsa-devel] ASoC : underrun messages

[Naveen Krishna Ch]

Hello,

I am experiencing some audio issue
While playing using aplay
some times i see the following messages.
(Sorry if the messages are too long)

[root at OMAP3 audio_samples]#aplay sample_96K.wav
Playing WAVE 'sample_96K.wav' : Signed 16 bit Little Endian, Rate 96000 Hz,
Stereo
underrun!!! (at least 1307.251 ms long)
underrun!!! (at least 554.656 ms long)
underrun!!! (at least 988.861 ms long)
underrun!!! (at least 554.443 ms long)
underrun!!! (at least 987.670 ms long)
underrun!!! (at least 995.484 ms long)
^CAborted by signal Interrupt...

[root at OMAP3 audio_samples]#aplay sample_48K.wav
Playing WAVE 'sample_48K.wav' : Signed 16 bit Little Endian, Rate 48000 Hz,
Stereo
underrun!!! (at least 69.306 ms long)
underrun!!! (at least 130.981 ms long)
underrun!!! (at least 205.750 ms long)
underrun!!! (at least 178.100 ms long)
underrun!!! (at least 146.057 ms long)
^CAborted by signal Interrupt...

[root at OMAP3 audio_samples]#aplay sample_8K.wav
Playing WAVE 'sample_8K.wav' : Signed 16 bit Little Endian, Rate 8000 Hz,
Stereo
^C^[[AAborted by signal Interrupt...

[root at OMAP3 audio_samples]#aplay sample_22K.wav
Playing WAVE 'sample_22K.wav' : Signed 16 bit Little Endian, Rate 22050 Hz,
Stereo
^CAborted by signal Interrupt...

[root at OMAP3 audio_samples]#aplay sample_44K.wav
Playing WAVE 'sample_44K.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo
underrun!!! (at least 1602.264 ms long)
underrun!!! (at least 873.078 ms long)
underrun!!! (at least 1693.268 ms long)
underrun!!! (at least 870.483 ms long)
underrun!!! (at least 540.466 ms long)
underrun!!! (at least 1122.711 ms long)

I am using OMAP3430 + twl4030 ASoC audio codec drivers.

I understand that the prints are coming from alsa-lib aplay.c file
As a result of the client not reading the buffers fast enough.

These are not conditionally reproducible, i see them uncertainly.

I saw the same isue with 2.6.26 some one suggested me to find
if there is any bug in the asoc layer.
Now i am using 2.6.28 kernel from kernel.org but still got the same

Can any one suggest me a way to find a fix for this..
-- 
Cheers
(: Naveen Krishna Ch :)