Thank you for reporting this bug to Ubuntu. Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1224749 Title: [MS-7388, Realtek ALC888, Green Line Out, Rear] Underruns, dropouts or crackling sound Status in pulseaudio package in Ubuntu: Incomplete Bug description: Crackling sound usually occurs when Skype runs first thing Ubuntu boots up. Also, I launch Skype manually. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: pulseaudio 1:1.1-0ubuntu15.3 ProcVersionSignature: Ubuntu 3.8.0-30.44~precise1-generic 3.8.13.6 Uname: Linux 3.8.0-30-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-30-generic. ApportVersion: 2.0.1-0ubuntu17.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: nelsonpong 1850 F.... pulseaudio /dev/snd/controlC1: nelsonpong 1850 F.... pulseaudio /dev/snd/controlC0: nelsonpong 1850 F.... pulseaudio /dev/snd/pcmC0D0c: nelsonpong 1850 F...m pulseaudio Card0.Amixer.info: Card hw:0 'SB'/'HDA ATI SB at 0xfcff4000 irq 16' Mixer name : 'Realtek ALC888' Components : 'HDA:10ec0888,14627388,00100001' Controls : 48 Simple ctrls : 20 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xfe9fc000 irq 19' Mixer name : 'Nvidia GPU 18 HDMI/DP' Components : 'HDA:10de0018,10de0101,00100100' Controls : 28 Simple ctrls : 4 Card2.Amixer.info: Card hw:2 'U0x46d0x8d7'/'USB Device 0x46d:0x8d7 at usb-0000:03:03.1-1, full speed' Mixer name : 'USB Mixer' Components : 'USB046d:08d7' Controls : 3 Simple ctrls : 2 Date: Thu Sep 12 21:09:06 2013 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB successful Symptom_Card: Built-in Audio - HDA ATI SB Symptom_Jack: Green Line Out, Rear Symptom_PulsePlaybackTest: PulseAudio playback test failed Symptom_Type: Underruns, dropouts, or "crackling" sound Title: [MS-7388, Realtek ALC888, Green Line Out, Rear] Underruns, dropouts or crackling sound UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V1.11 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: MS-7388 dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.11:bd12/01/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7388:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7388:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: MS-7388 dmi.product.version: 1.0 dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD modified.conffile..etc.pulse.daemon.conf: [modified] mtime.conffile..etc.pulse.daemon.conf: 2013-09-06T13:12:23 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1224749/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp