>> Maybe I should first apply your patch and trigger a synthesised xrun >> with xrun_injection to see if I'm not missing something else. > > Yes, it makes more sense. Just in case I tried echo 1 > /sys/kernel/debug/tracing/events/snd_pcm/enable (so for the whole snd_pcm instead of just xrun) and I can see a lot of events hwptr/applptr in /sys/kernel/debug/tracing/trace, so I guess tracing is working. I'm going back to the program to see if there is anything suspect. Thanks, Raphael _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel