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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1069331 Title: [ASRock Z77 Extreme4, Realtek ALC898, Green Headphone Out, Front] Underruns, dropouts or crackling sound To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1069331/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
