Public bug reported: problem happens whether changing volume using Pulseaudio, or using alsamixer from cli.
Background: USB audio device EVGA NU audio installed and working at boot Action: change volume level (using pulseaudio or alsamixer) Expected: volume level change, sound keeps playing Actual result: audio output stops. More info: reloading alsa does not fix problem. reloading pulseaudio does not fix problem Following lines found in syslog: Jul 10 13:39:10 TorreyPine pulseaudio[1515]: ALSA woke us up to write new data to the device, but there was actually nothing to write. Jul 10 13:39:10 TorreyPine pulseaudio[1515]: Most likely this is a bug in the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA developers. Jul 10 13:39:10 TorreyPine pulseaudio[1515]: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail. Release info: Linux TorreyPine 5.11.0-22-generic #23-Ubuntu SMP Thu Jun 17 00:34:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Pulseaudio package info: Linux TorreyPine 5.11.0-22-generic #23-Ubuntu SMP Thu Jun 17 00:34:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: pulseaudio 1:14.2-1ubuntu1.1 ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21 Uname: Linux 5.11.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: doug 1515 F.... pulseaudio /dev/snd/controlC0: doug 1515 F.... pulseaudio CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Sat Jul 10 13:48:52 2021 InstallationDate: Installed on 2020-04-26 (440 days ago) InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio UpgradeStatus: Upgraded to hirsute on 2021-05-08 (63 days ago) dmi.bios.date: 03/11/2021 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3002 dmi.board.asset.tag: Default string dmi.board.name: PRIME B450-PLUS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd03/11/2021:br5.17:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEB450-PLUS:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: System manufacturer modified.conffile..etc.pulse.daemon.conf: [modified] mtime.conffile..etc.pulse.daemon.conf: 2020-05-15T17:21:42.290977 ** Affects: pulseaudio (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug hirsute -- 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/1935758 Title: changing volume kills USB audio output Status in pulseaudio package in Ubuntu: New Bug description: problem happens whether changing volume using Pulseaudio, or using alsamixer from cli. Background: USB audio device EVGA NU audio installed and working at boot Action: change volume level (using pulseaudio or alsamixer) Expected: volume level change, sound keeps playing Actual result: audio output stops. More info: reloading alsa does not fix problem. reloading pulseaudio does not fix problem Following lines found in syslog: Jul 10 13:39:10 TorreyPine pulseaudio[1515]: ALSA woke us up to write new data to the device, but there was actually nothing to write. Jul 10 13:39:10 TorreyPine pulseaudio[1515]: Most likely this is a bug in the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA developers. Jul 10 13:39:10 TorreyPine pulseaudio[1515]: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail. Release info: Linux TorreyPine 5.11.0-22-generic #23-Ubuntu SMP Thu Jun 17 00:34:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Pulseaudio package info: Linux TorreyPine 5.11.0-22-generic #23-Ubuntu SMP Thu Jun 17 00:34:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: pulseaudio 1:14.2-1ubuntu1.1 ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21 Uname: Linux 5.11.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: doug 1515 F.... pulseaudio /dev/snd/controlC0: doug 1515 F.... pulseaudio CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Sat Jul 10 13:48:52 2021 InstallationDate: Installed on 2020-04-26 (440 days ago) InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio UpgradeStatus: Upgraded to hirsute on 2021-05-08 (63 days ago) dmi.bios.date: 03/11/2021 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3002 dmi.board.asset.tag: Default string dmi.board.name: PRIME B450-PLUS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd03/11/2021:br5.17:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEB450-PLUS:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: System manufacturer modified.conffile..etc.pulse.daemon.conf: [modified] mtime.conffile..etc.pulse.daemon.conf: 2020-05-15T17:21:42.290977 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1935758/+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