Case 2, where just the first soundcard is removed:
D: module-console-kit.c: dbus: interface=org.freedesktop.ConsoleKit.Seat,
path=/org/freedesktop/ConsoleKit/Seat1, member=SessionRemoved
D: module-alsa-sink.c: hwbuf_unused=0
D: module-alsa-sink.c: setting avail_min=1
D: module-suspend-on-idle.c: Sink
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 becomes idle.
D: module-suspend-on-idle.c: Sink
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 becomes idle.
I: sink-input.c: Freeing input 2 "ALSA Playback"
I: module-stream-restore.c: Restoring device for stream
sink-input-by-application-name:ALSA plug-in [mythfrontend.real].
I: module-stream-restore.c: Restoring volume for sink input
sink-input-by-application-name:ALSA plug-in [mythfrontend.real].
D: module-stream-restore.c: Not restoring mute state for sink input
sink-input-by-application-name:ALSA plug-in [mythfrontend.real], because
already set.
D: module-suspend-on-idle.c: Sink
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 becomes busy.
I: resampler.c: Using resampler 'src-linear'
I: resampler.c: Using float32le as working format.
D: memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=4,
prebuf=0, minreq=1 maxrewind=0
D: memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432,
base=4, prebuf=0, minreq=4 maxrewind=0
I: sink-input.c: Created input 3 "ALSA Playback" on
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 with sample spec s16le
2ch 48000Hz and channel map front-left,front-right
I: protocol-native.c: Requested tlength=500,00 ms, minreq=125,00 ms
D: protocol-native.c: Early requests mode enabled, configuring sink latency to
minreq.
D: memblockq.c: memblockq requested: maxlength=4194304, tlength=96000, base=4,
prebuf=72000, minreq=24000 maxrewind=0
D: memblockq.c: memblockq sanitized: maxlength=4194304, tlength=96000, base=4,
prebuf=72000, minreq=24000 maxrewind=0
I: protocol-native.c: Final latency 625,00 ms = 250,00 ms + 2*125,00 ms +
125,00 ms
D: module-alsa-sink.c: hwbuf_unused=0
D: module-alsa-sink.c: setting avail_min=1
D: protocol-native.c: Requesting rewind due to end of underrun.
I: (alsa-lib)pcm_plugin.c: short commit: 2
D: module-alsa-sink.c: snd_pcm_mmap_commit: Broken pipe
D: module-alsa-sink.c: snd_pcm_mmap_commit: Buffer underrun!
I: (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_PREPARE failed
I: (alsa-lib)pcm.c: cannot recovery from underrun, prepare failed: Device or
resource busy
E: module-alsa-sink.c: snd_pcm_mmap_commit: Device or resource busy
I: module.c: Unloading "module-alsa-sink" (index: #4).
I: module-alsa-sink.c: Trying resume...
D: module-alsa-sink.c: hwbuf_unused=0
D: module-alsa-sink.c: setting avail_min=1
I: module-alsa-sink.c: Resumed successfully...
I: module-alsa-sink.c: Starting playback.
D: module-suspend-on-idle.c: Sink
alsa_output.usb_device_d8c_c_noserial_if0_sound_card_0_alsa_playback_0 becomes
idle.
D: module-suspend-on-idle.c: Sink
alsa_output.usb_device_d8c_c_noserial_if0_sound_card_0_alsa_playback_0 becomes
busy.
D: module-suspend-on-idle.c: Sink
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 becomes idle.
D: module-alsa-sink.c: hwbuf_unused=0
D: module-alsa-sink.c: setting avail_min=1
D: sink.c: Requesting rewind due to started move
D: module-suspend-on-idle.c: Sink
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 becomes idle.
D: module-alsa-sink.c: hwbuf_unused=0
D: module-alsa-sink.c: setting avail_min=1
D: sink.c: Requesting rewind due to finished move
I: protocol-native.c: Requested tlength=500,00 ms, minreq=125,00 ms
D: protocol-native.c: Adjust latency mode enabled, configuring sink latency to
half of overall latency.
D: module-alsa-sink.c: hwbuf_unused=0
D: module-alsa-sink.c: setting avail_min=1
D: sink-input.c: Successfully moved sink input 3 from
alsa_output.pci_10de_371_sound_card_0_alsa_playback_0 to
alsa_output.usb_device_d8c_c_noserial_if0_sound_card_0_alsa_playback_0.
I: module-rescue-streams.c: Sucessfully moved sink input 3 "ALSA plug-in
[mythfrontend.real]" to
alsa_output.usb_device_d8c_c_noserial_if0_sound_card_0_alsa_playback_0.
D: module-rescue-streams.c: No source outputs to move away.
D: module-alsa-sink.c: Thread shutting down
I: sink.c: Freeing sink 0
"alsa_output.pci_10de_371_sound_card_0_alsa_playback_0"
I: source.c: Freeing source 0
"alsa_output.pci_10de_371_sound_card_0_alsa_playback_0.monitor"
I: module.c: Unloaded "module-alsa-sink" (index: #4).
I: module-stream-restore.c: Storing volume/mute/device for stream
sink-input-by-application-name:ALSA plug-in [mythfrontend.real].
I: module-stream-restore.c: Synced.
--
pulseaudio crashes frequently
https://bugs.launchpad.net/bugs/382413
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