I have also observed a similar behavior with Ubuntu 20.04 lspci | grep Audio
09:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] 0b:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller uname -a Linux jrechenknecht7 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux and Firefox 88.0.1 (AMD64 Platform). For me this bug also causes other applications to be distorted, too. sudo lshw -C sound sudo lshw -C sound *-usb:4 Beschreibung: Audio-Gerät Produkt: HD Webcam C615 Hersteller: Logitech, Inc. Physische ID: a Bus-Informationen: usb@1:a Version: 0.11 Seriennummer: 4B9FE1D0 Fähigkeiten: usb-2.00 audio-control Konfiguration: driver=uvcvideo maxpower=500mA speed=480Mbit/s *-multimedia Beschreibung: Audio device Produkt: Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] Hersteller: Advanced Micro Devices, Inc. [AMD/ATI] Physische ID: 0.1 Bus-Informationen: pci@0000:09:00.1 Version: 00 Breite: 64 bits Takt: 33MHz Fähigkeiten: pm pciexpress msi bus_master cap_list Konfiguration: driver=snd_hda_intel latency=0 Ressourcen: irq:100 memory:fce60000-fce63fff *-multimedia Beschreibung: Audio device Produkt: Starship/Matisse HD Audio Controller Hersteller: Advanced Micro Devices, Inc. [AMD] Physische ID: 0.4 Bus-Informationen: pci@0000:0b:00.4 Version: 00 Breite: 32 bits Takt: 33MHz Fähigkeiten: pm pciexpress msi bus_master cap_list Konfiguration: driver=snd_hda_intel latency=0 Ressourcen: irq:102 memory:fc900000-fc907fff Note that the behavior occurred when the Logitex C615 has been unplugged. I was just curious, because Dave Evans has the same webcam so I could not exclude that this may be related. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1906741 Title: Firefox sometimes causes garbled audio Status in firefox package in Ubuntu: Confirmed Status in pulseaudio package in Ubuntu: Confirmed Bug description: Opening certain applications/websites at the same time as Firefox causes the audio to become garbled. The audio sounds distorted with an echo. Certain actions are guaranteed to cause this, but it can also happening when only running instances of Firefox. I've been able to consistently cause this by launching Zoom from a link within Firefox. This does not occur when using Chrome. The only way to fix the issue is to shut down all audio-related programs. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: firefox 83.0+build2-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73 Uname: Linux 5.4.0-56-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu27.12 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: rdevans 55475 F.... pulseaudio /dev/snd/controlC0: rdevans 55475 F.... pulseaudio /dev/snd/controlC3: rdevans 55475 F.... pulseaudio /dev/snd/controlC1: rdevans 55475 F.... pulseaudio BuildID: 20201112153044 CasperMD5CheckResult: skip Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Thu Dec 3 16:55:36 2020 Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) InstallationDate: Installed on 2017-10-20 (1140 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412) IpRoute: default via 10.0.0.1 dev enp7s0 proto dhcp metric 100 10.0.0.0/24 dev enp7s0 proto kernel scope link src 10.0.0.7 metric 100 169.254.0.0/16 dev enp7s0 scope link metric 1000 Locales: extensions.sqlite corrupt or missing PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:354 PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=83.0/20201112153044 (In use) RunningIncompatibleAddons: False SourcePackage: firefox Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to focal on 2020-11-12 (21 days ago) dmi.bios.date: 02/18/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.40 dmi.board.name: H67M 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.:bvrP1.40:bd02/18/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnH67M:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: 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. 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