root@ubuntu-phablet:/# grep -i audio /var/log/syslog
Jan  1 00:02:25 ubuntu-phablet kernel: [    0.639092]  zone lp_audio	: 0xfed00000 - 0xfed7ffff ( 512 KB)
Jan  1 00:02:25 ubuntu-phablet kernel: [    0.687030] ION heap audio created at 0x7ef00000 with size 614000
Jan  1 00:02:25 ubuntu-phablet kernel: [    3.188592] coresight-audio-etm audio_etm0.0: Audio ETM initialized
Jan  1 00:02:25 ubuntu-phablet kernel: [    3.203390] usbcore: registered new interface driver snd-usb-audio
Jan  1 00:02:25 ubuntu-phablet kernel: [    3.326144] msm8974-asoc-taiko fe02c000.sound: msm8974_asoc_machine_probe(): No hdmi audio support
Jan  1 00:02:25 ubuntu-phablet kernel: [    3.667251] msm8974-asoc-taiko fe02c000.sound: msm8974_asoc_machine_probe(): No hdmi audio support
Jan  1 00:02:25 ubuntu-phablet kernel: [    4.046695] msm8974-asoc-taiko fe02c000.sound: msm8974_asoc_machine_probe(): No hdmi audio support
Jan  1 00:02:25 ubuntu-phablet kernel: [    4.049227] msm8974-asoc-taiko fe02c000.sound: msm8974_asoc_machine_probe(): No hdmi audio support
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:29] Unknown output devices entries: AUDIO_DEVICE_OUT_PROXY|AUDIO_DEVICE_OUT_FM_TX
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:36] Unknown output devices entries: AUDIO_DEVICE_OUT_PROXY|AUDIO_DEVICE_OUT_FM_TX
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:43] Unknown output devices entries: AUDIO_DEVICE_OUT_PROXY
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:48] Unknown output channel_masks entries: AUDIO_CHANNEL_OUT_2POINT1|AUDIO_CHANNEL_OUT_PENTA|AUDIO_CHANNEL_OUT_6POINT1
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:49] Unknown formats entries: AUDIO_FORMAT_EAC3
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:50] Unknown output devices entries: AUDIO_DEVICE_OUT_PROXY|AUDIO_DEVICE_OUT_FM_TX
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:56] Unknown formats entries: AUDIO_FORMAT_QCELP|AUDIO_FORMAT_EVRC|AUDIO_FORMAT_EVRCB|AUDIO_FORMAT_EVRCWB|AUDIO_FORMAT_EVRCNW
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:58] Unknown flags entries: AUDIO_OUTPUT_FLAG_VOIP_RX
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:64] Unknown input channel_masks entries: AUDIO_CHANNEL_IN_5POINT1
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:65] Unknown formats entries: AUDIO_FORMAT_QCELP|AUDIO_FORMAT_EVRC|AUDIO_FORMAT_EVRCB|AUDIO_FORMAT_EVRCWB|AUDIO_FORMAT_EVRCNW
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: [/system/etc/audio_policy.conf:66] Unknown input devices entries: AUDIO_DEVICE_IN_FM_RX|AUDIO_DEVICE_IN_FM_RX_A2DP
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: Failed to get hw module id: audio name: primary, trying alternative.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] droid-util.c: Failed to get hw module id: libaudio name: primary.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] module.c: Failed to load module "module-droid-card-22" (argument: "voice_virtual_stream=true"): initialization failed.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] module-dbus-protocol.c: module-dbus-protocol is currently unsupported, and can sometimes cause PulseAudio crashes.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] module-dbus-protocol.c: The most popular use cases for module-dbus-protocol are related to changing equalizer settings and LADSPA plugin parameters at runtime.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] module-dbus-protocol.c: If you don't use such functionality, it's possible that you don't actually need this module.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] main.c: Sink sink.primary does not exist.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] main.c: Source source.primary does not exist.
Jan  1 00:02:52 ubuntu-phablet pulseaudio[1638]: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper exited with unknown return code 1