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[Raymond <1360739@xxxxxxxxxxxxxxxxxx>]

Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.522|   0.000) [alsa-sink-USB Audio] source.c: Processing rewind...
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.522|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.522|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.522|   0.000) [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.iec958-stereo becomes idle, timeout in 5 seconds.
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.522|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: message repeated 2 times: [ (  15.522|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)]
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.523|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: message repeated 11 times: [ (  15.523|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)]
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: (  15.524|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)
Aug 24 14:57:21 ben-P55-USB3 pulseaudio[3262]: message repeated 2 times: [ (  15.524|   0.000) [alsa-sink-USB Audio] sink.c: Found underrun 15620 bytes ago (256 bytes ahead in playback buffer)]
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   1.903) [pulseaudio] client.c: Created 44 "Native client (UNIX socket client)"
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] protocol-native.c: Protocol version: remote 28, local 28
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] protocol-native.c: Got credentials: uid=1000 gid=1000 success=1
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] protocol-native.c: SHM possible: yes
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] protocol-native.c: Negotiated SHM: yes
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] module-augment-properties.c: Looking for .desktop file for pasuspender
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] protocol-native.c: Suspending all sinks
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.427|   0.000) [pulseaudio] sink.c: Suspend cause of sink alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.iec958-stereo is 0x0001, suspending
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.432|   0.004) [alsa-sink-USB Audio] alsa-sink.c: Device suspended...
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.433|   0.000) [pulseaudio] module-udev-detect.c: /dev/snd/controlC2 is accessible: yes
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.433|   0.000) [pulseaudio] module-udev-detect.c: Resuming all sinks and sources of card alsa_card.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.433|   0.000) [pulseaudio] protocol-native.c: Suspending all sources
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.433|   0.000) [pulseaudio] source.c: Suspend cause of source alsa_input.pci-0000_00_1b.0.iec958-stereo is 0x0001, suspending
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.434|   0.001) [alsa-source-ALC892 Digital] alsa-source.c: Device suspended...
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.435|   0.000) [pulseaudio] module-udev-detect.c: /dev/snd/controlC0 is accessible: yes
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.435|   0.000) [pulseaudio] module-udev-detect.c: Resuming all sinks and sources of card alsa_card.pci-0000_00_1b.0.
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.518|   0.083) [pulseaudio] client.c: Created 45 "Native client (UNIX socket client)"
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.519|   0.000) [pulseaudio] client.c: Freed 45 "Native client (UNIX socket client)"
Aug 24 14:57:23 ben-P55-USB3 pulseaudio[3262]: (  17.519|   0.000) [pulseaudio] protocol-native.c: Connection died.
Aug 24 14:57:26 ben-P55-USB3 pulseaudio[3262]: (  20.522|   3.003) [pulseaudio] module-suspend-on-idle.c: Sink alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.iec958-stereo idle for too long, suspending ...
Aug 24 14:57:26 ben-P55-USB3 pulseaudio[3262]: (  20.523|   0.000) [pulseaudio] core.c: All sinks and sources are suspended, vacuuming memory
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.435|  14.912) [pulseaudio] module-udev-detect.c: /dev/snd/controlC2 is accessible: yes
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.435|   0.000) [pulseaudio] module-udev-detect.c: Resuming all sinks and sources of card alsa_card.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.437|   0.002) [pulseaudio] protocol-native.c: Resuming all sinks
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.437|   0.000) [pulseaudio] protocol-native.c: Resuming all sources
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.437|   0.000) [pulseaudio] source.c: Suspend cause of source alsa_input.pci-0000_00_1b.0.iec958-stereo is 0x0000, resuming
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.438|   0.001) [pulseaudio] reserve-wrap.c: Successfully acquired reservation lock on device 'Audio0'
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.438|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: Trying resume...
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-util.c: Trying to disable ALSA period wakeups, using timers only
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-util.c: Maximum hw buffer size is 371 ms
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-util.c: Set buffer size first (to 16384 samples), period size second (to 8192 samples).
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-util.c: ALSA period wakeups disabled
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: latency set to 20.00ms
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: hwbuf_unused=62008
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: setting avail_min=442
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: latency set to 20.00ms
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: hwbuf_unused=62008
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: setting avail_min=442
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.439|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: Time scheduling watermark is 10.00ms
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.440|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: Resumed successfully...
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.440|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: Starting capture.
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.440|   0.000) [pulseaudio] client.c: Freed 44 "pasuspender"
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.440|   0.000) [pulseaudio] protocol-native.c: Connection died.
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.542|   0.102) [alsa-source-ALC892 Digital] alsa-source.c: Scheduling delay of 11.61ms, you might want to investigate this to improve latency...
Aug 24 14:57:41 ben-P55-USB3 pulseaudio[3262]: (  35.542|   0.000) [alsa-source-ALC892 Digital] alsa-source.c: Overrun!

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https://bugs.launchpad.net/bugs/1360739

Title:
  [USB-Audio, playback] Popping sound

Status in “alsa-driver” package in Ubuntu:
  New

Bug description:
  I'm using Alesis M1 Active 520USB speakers and the speakers randomly
  crack and pop, when playing music and videos.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4
  Uname: Linux 3.13.0-34-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ben        3262 F.... pulseaudio
   /dev/snd/controlC2:  ben        3262 F.... pulseaudio
   /dev/snd/controlC0:  ben        3262 F.... pulseaudio
   /dev/snd/pcmC0D1c:   ben        3262 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Sun Aug 24 14:55:22 2014
  InstallationDate: Installed on 2014-07-19 (36 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:CODEC failed
  Symptom_Card: PCM2900B Audio CODEC - USB Audio CODEC
  Symptom_Type: Underruns, dropouts, or "crackling" sound
  Title: [USB-Audio - USB Audio CODEC, playback] Underruns, dropouts or crackling sound
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/01/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F9
  dmi.board.name: P55-USB3
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF9:bd11/01/2010:svnGigabyteTechnologyCo.,Ltd.:pnP55-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP55-USB3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: P55-USB3
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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