Re: [alsa-devel] Problem with "set_period_size"

Alicia Romero wrote:

stream->pb_frames = (snd_pcm_uframes_t) 640;
snd_pcm_hw_params_set_period_size (stream->pb_pcm, params,
                    &stream->pb_frames, NULL);

You forgot to check the return value. I'd guess it's -EINVAL.

Regards, Clemens