I checked in Firefox 55, which routes all audio via PulseAudio, and sound is perfect.
There may be a problem between chromium-browser and pulseaudio. ** Description changed: PulseAudio exhibits abnormal behavior after resuming from suspend: - Crackling sound present during HTML5 video playback in browsers (Chromium, Firefox, Chrome). + Crackling sound present during HTML5 video playback in Chromium 60. I tried adding tsched=0 to load-module module-udev-detect in /etc/pulse/default.pa, and it didn't work. I slightly increased fragment number and size in /etc/pulse/daemon.conf, didn't work either. Before suspending, multiple sound sources can be handled without problems nor audible noise. After suspending machine, sound source is noisy/crackling, as if there were buffer underruns. - - $ lsb_release -rd + $ lsb_release -rd Description: elementary OS 0.4.1 Loki (based on Ubuntu 16.04, official kernel 4.10.0-32-generic) Release: 0.4.1 $ apt-cache policy pulseaudio pulseaudio: - Instalados: 1:8.0-0ubuntu3.3 - Candidato: 1:8.0-0ubuntu3.3 - Tabla de versión: - *** 1:8.0-0ubuntu3.3 500 - 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages - 100 /var/lib/dpkg/status - 1:8.0-0ubuntu3 500 - 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages + Instalados: 1:8.0-0ubuntu3.3 + Candidato: 1:8.0-0ubuntu3.3 + Tabla de versión: + *** 1:8.0-0ubuntu3.3 500 + 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages + 100 /var/lib/dpkg/status + 1:8.0-0ubuntu3 500 + 500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages ProblemType: Bug DistroRelease: elementary 0.4.1 Package: pulseaudio 1:8.0-0ubuntu3.3 [origin: Ubuntu] ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17 Uname: Linux 4.10.0-32-generic x86_64 NonfreeKernelModules: wl nvidia_uvm nvidia ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: dmayr 10024 F.... pulseaudio - /dev/snd/pcmC0D0p: dmayr 10024 F...m pulseaudio - /dev/snd/controlC0: dmayr 10024 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC1: dmayr 10024 F.... pulseaudio + /dev/snd/pcmC0D0p: dmayr 10024 F...m pulseaudio + /dev/snd/controlC0: dmayr 10024 F.... pulseaudio CurrentDesktop: Pantheon Date: Thu Aug 17 22:57:28 2017 InstallationDate: Installed on 2017-06-01 (77 days ago) InstallationMedia: elementary OS 0.4.1 "Loki" - Stable amd64 (20170517) SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/11/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 6UET70WW (1.50 ) dmi.board.name: 2924BV6 dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6UET70WW(1.50):bd10/11/2012:svnLENOVO:pn2924BV6:pvrThinkPadT410s:rvnLENOVO:rn2924BV6:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2924BV6 dmi.product.version: ThinkPad T410s dmi.sys.vendor: LENOVO modified.conffile..etc.pulse.daemon.conf: [modified] mtime.conffile..etc.pulse.daemon.conf: 2017-08-17T15:17:20.438064 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1711483 Title: Crackling sound after resuming from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1711483/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs