As requested, tested kernel 4.1.0-040100rc3-generic. Audio playback is still lost.
See attached verbose output from pulseaudio, including the line that makes all sound go away:
(2356.093| 0.000) D: [alsa-sink-ALC889 Analog] protocol-native.c: max_request changed, trying to update from 70272 to 71292. (2356.093| 0.000) D: [alsa-sink-ALC889 Analog] protocol-native.c: Notifying client about increased tlength (2356.093| 0.000) D: [alsa-sink-ALC889 Analog] alsa-sink.c: Latency set to 341.33ms (2356.093| 0.000) D: [alsa-sink-ALC889 Analog] alsa-sink.c: hwbuf_unused=4 (2356.093| 0.000) D: [alsa-sink-ALC889 Analog] alsa-sink.c: setting avail_min=737 (2356.268| 0.175) I: [alsa-sink-ALC889 Analog] alsa-sink.c: Underrun! (2356.268| 0.000) I: [alsa-sink-ALC889 Analog] alsa-sink.c: Increasing wakeup watermark to 331.31 ms (2356.447| 0.178) I: [alsa-sink-ALC889 Analog] alsa-sink.c: Underrun!
As requested, tested kernel 4.1.0-040100rc3 -generic. Audio playback is still lost.
See attached verbose output from pulseaudio, including the line that makes all sound go away:
(2356.093| 0.000) D: [alsa-sink-ALC889 Analog] protocol-native.c: max_request changed, trying to update from 70272 to 71292.
(2356.093| 0.000) D: [alsa-sink-ALC889 Analog] protocol-native.c: Notifying client about increased tlength
(2356.093| 0.000) D: [alsa-sink-ALC889 Analog] alsa-sink.c: Latency set to 341.33ms
(2356.093| 0.000) D: [alsa-sink-ALC889 Analog] alsa-sink.c: hwbuf_unused=4
(2356.093| 0.000) D: [alsa-sink-ALC889 Analog] alsa-sink.c: setting avail_min=737
(2356.268| 0.175) I: [alsa-sink-ALC889 Analog] alsa-sink.c: Underrun!
(2356.268| 0.000) I: [alsa-sink-ALC889 Analog] alsa-sink.c: Increasing wakeup watermark to 331.31 ms
(2356.447| 0.178) I: [alsa-sink-ALC889 Analog] alsa-sink.c: Underrun!