Another day, another attempt. This time using patches from pulseaudio git. It seems my problem lies elsewere. I added tsched=0 to see if that helps and it doesn't. I think I initially misdiagnosed the problem. It seems to happen somewhere between pulseaudio and pulseaudio alsa plugin. For some reason, even though native streams seem to work correctly, alsa plugin refuses to work. snd_pcm_avail_update() seems to be returning negative values all the time. It works with pulseaudio 0.9.10, but doesn't in 0.9.11. Does somebody have an idea, what should be changed to make it work again ? For reference: when I run `aplay -d 2 </dev/urandom`, the output is: Playing raw data 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono underrun!!! (at least -2076735053.479 ms long) aplay: xrun:1114: xrun: prepare error: Input/output error