On Thu, 01 Aug 2019 23:39:38 +0200, Harry Bloomberg wrote:

While running an amateur radio application on a Raspberry Pi 3B+ with the stretch version of Raspberrian, I see the following in my syslog:

Aug 1 17:31:06 raspberrypi pulseaudio[853]: [alsa-sink-USB Audio] alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write. Aug 1 17:31:06 raspberrypi pulseaudio[853]: [alsa-sink-USB Audio] alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA developers. Aug 1 17:31:06 raspberrypi pulseaudio[853]: [alsa-sink-USB Audio] alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

So...I am reporting this to the developers as instructed by the error message. What additional information do you need?

I'm not exactly sure what I was doing to trigger this error. I may have been exiting the application.

It's usual chatty PulseAudio, so currently there is no much concern regarding it, unless you face really any issue triggered by that.

thanks,

Takashi