Re: [alsa-devel] about sound/core/pcm_lib.c:1997: capture read error (DMA or IRQ trouble?)

Akio write:

after long time amr-wb codec loopback test. (above 90 hours) I got the following kernel message. it comes from snd_pcm_lib_read1() function. ALSA sound/core/pcm_lib.c:1997: capture read error (DMA or IRQ trouble?)

This error indicates that no interrupt has been received for ten seconds.

I would have guessed that some 32-bit counter has overflowed, but at 48 kHz, a frame counter would overflow after slightly less than 25 hours.

HTH Clemens