did this hapeen after suspend resume since there are quite many udev event in your pulseaudio log ?
0 mBm) [ 2792.763765] PM: Syncing filesystems ... done. [ 2792.766679] PM: Preparing system for mem sleep [ 2793.160731] Freezing user space processes ... (elapsed 0.01 seconds) done. [ 2793.173489] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done. [ 2793.189471] PM: Entering mem sleep [ 2793.189535] Suspending console(s) (use no_console_suspend to debug) [ 2793.190291] sd 2:0:0:0: >[sda] Synchronizing SCSI cache [ 2793.192450] xhci_hcd 0000:06:00.0: >WARN Event TRB for slot 1 ep 3 with no TDs queued? [ 2793.192452] xhci_hcd 0000:06:00.0: >WARN Event TRB for slot 1 ep 2 with no TDs queued? [ 2793.192453] xhci_hcd 0000:06:00.0: >WARN Event TRB for slot 1 ep 0 with no TDs queued? [ 2793.192460] xhci_hcd 0000:00:14.0: >WARN Event TRB for slot 2 ep 3 with no TDs queued? [ 2793.192461] xhci_hcd 0000:00:14.0: >WARN Event TRB for slot 2 ep 2 with no TDs queued? [ 2793.192461] xhci_hcd 0000:00:14.0: >WARN Event TRB for slot 2 ep 0 with no TDs queued? [ 2793.192530] xhci_hcd 0000:00:14.0: >WARN Event TRB for slot 1 ep 0 with no TDs queued? [ 2793.192747] serial 00:0b: >disabled [ 2793.192750] serial 00:0b: >wake-up capability disabled by ACPI [ 2793.214498] sd 2:0:0:0: >[sda] Stopping disk [ 2793.297364] PM: suspend of drv:ehci_hcd dev:0000:00:1a.0 complete after 104.271 msecs [ 2793.417289] PM: suspend of drv:snd_hda_intel dev:0000:00:1b.0 complete after 224.271 msecs -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1069331 Title: [ASRock Z77 Extreme4, Realtek ALC898, Green Headphone Out, Front] Underruns, dropouts or crackling sound Status in “alsa-driver” package in Ubuntu: Confirmed Bug description: I just upgraded to Quantal but I had the same issue on precise pandolin. Sound randomly stutters. Sometimes it takes 5 minutes to happen sometimes it will happen twice in a 10 second interval. I have version 1.0.25-3ubuntu3 of alsa. I tried the workarounds outlined in https://wiki.ubuntu.com/Audio/PositionReporting hence my modified alsa file. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: alsa-base 1.0.25+dfsg-0ubuntu3 ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5 Uname: Linux 3.5.0-17-generic x86_64 ApportVersion: 2.6.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: carlos 2308 F.... xfce4-volumed carlos 2314 F.... pulseaudio /dev/snd/pcmC0D0p: carlos 2314 F...m pulseaudio Date: Sun Oct 21 10:15:47 2012 InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Green Headphone Out, Front Symptom_PulsePlaybackTest: PulseAudio playback test successful Symptom_Type: Underruns, dropouts, or "crackling" sound Title: [To Be Filled By O.E.M., Realtek ALC898, Green Headphone Out, Front] Underruns, dropouts or crackling sound UpgradeStatus: Upgraded to quantal on 2012-10-21 (0 days ago) dmi.bios.date: 09/13/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.20 dmi.board.name: Z77 Extreme4 dmi.board.vendor: ASRock 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.:bvrP2.20:bd09/13/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ77Extreme4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. mtime.conffile..etc.modprobe.d.alsa.base.conf: 2012-10-20T09:41:41.486517 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1069331/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
