Attached syslog with verbose pulseaudio logs. I was clicking "Make a test sound" on Skype, skipped audio file on SMPlayer etc, so that short sound cracking is produced.
** Attachment added: "syslog" https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1650947/+attachment/4793507/+files/syslog -- 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/1650947 Title: module-equalizer-sink produces cracking at the beginning of playback Status in pulseaudio package in Ubuntu: New Bug description: After upgrade from Kubuntu 14.04 to Kubuntu 16.04 (amd64), audio playback contains cracking, especially noticeable when sound/video file is seeked (on SMplayer, Youtube on Firefox), or new notification sound plays in IM clients (in Skype, qTox, ...). Usually cracking stops shortly, though some times it goes for long time, until "killall pulseaudio" is initiated. Once "load-module module-equalizer-sink" line is commented-out and system rebooted, everything returns back to normal playback without distortions. When -vvvv is added into client.conf to extra arguments, syslog contains some interesting lines about underrun, which might be relevant: Dec 18 21:47:34 tomas-Z87X-SLI pulseaudio[2324]: [alsa-sink-ca0106] sink.c: alsa_output.pci-0000_05_01.0.analog-surround-40: Found underrun 3800 bytes ago (34600 bytes ahead in playback buffer) Dec 18 21:47:34 tomas-Z87X-SLI pulseaudio[2324]: message repeated 3 times: [ [alsa-sink-ca0106] sink.c: alsa_output.pci-0000_05_01.0.analog-surround-40: Found underrun 3800 bytes ago (34600 bytes ahead in playback buffer)] ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: pulseaudio 1:8.0-0ubuntu3.1 ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30 Uname: Linux 4.4.0-53-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.4 Architecture: amd64 CurrentDesktop: KDE Date: Sun Dec 18 21:41:52 2016 InstallationDate: Installed on 2014-12-07 (741 days ago) InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) SourcePackage: pulseaudio UpgradeStatus: Upgraded to xenial on 2016-08-05 (134 days ago) dmi.bios.date: 06/12/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F3c dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z87X-SLI dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3c:bd06/12/2014:svnGigabyteTechnologyCo.,Ltd.:pnZ87X-SLI:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87X-SLI:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: Z87X-SLI dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. modified.conffile..etc.pulse.default.pa: [modified] mtime.conffile..etc.pulse.default.pa: 2016-12-18T21:14:16.931919 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1650947/+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
