Public bug reported: I have a EDIROL UA-1A USB soundcard which for the most part under 12.04 worked however after a period of uptime, ALSA calls started failing with messages of this nature:
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave and the kernel ring buffer would have streams of: [673754.825092] xhci_hcd 0000:02:00.0: ERROR Transfer event TRB DMA ptr not part of current TD [673754.830412] xhci_hcd 0000:02:00.0: ERROR Transfer event TRB DMA ptr not part of current TD and: [673429.575699] retire_capture_urb: 596 callbacks suppressed sometimes unplugging/plugging the card would fix this, other times a system reboot was required. Since the upgrade to 14.04 this seems to have got worse in that most of the time it behaves in this manner and the unplugging/plugging approach never works. From a kernel perspective, I was already running a 3.13.x release with 12.04 so there's not been a major update on this front since the upgrade. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: pulseaudio 1:4.0-0ubuntu11.1 ProcVersionSignature: Ubuntu 3.13.0-106.153-generic 3.13.11-ckt39 Uname: Linux 3.13.0-106-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.23 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jon 25970 F.... pulseaudio /dev/snd/pcmC0D0c: jon 25970 F...m pulseaudio /dev/snd/pcmC0D0p: jon 25970 F...m pulseaudio CurrentDesktop: LXDE Date: Fri Jan 13 12:56:13 2017 InstallationDate: Installed on 2013-07-25 (1268 days ago) InstallationMedia: Ubuntu-Server 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130214) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio Symptom: audio UpgradeStatus: Upgraded to trusty on 2016-12-28 (15 days ago) dmi.bios.date: 02/22/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: X9SBAA dmi.board.vendor: Supermicro dmi.board.version: 0123456789 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 17 dmi.chassis.vendor: Supermicro dmi.chassis.version: 0123456789 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd02/22/2013:svnSupermicro:pnX9SBAA:pvr0123456789:rvnSupermicro:rnX9SBAA:rvr0123456789:cvnSupermicro:ct17:cvr0123456789: dmi.product.name: X9SBAA dmi.product.version: 0123456789 dmi.sys.vendor: Supermicro ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug third-party-packages trusty ** Package changed: pulseaudio (Ubuntu) => ubuntu -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1656302 Title: USB sound card intermittant/unable to play audio Status in Ubuntu: New Bug description: I have a EDIROL UA-1A USB soundcard which for the most part under 12.04 worked however after a period of uptime, ALSA calls started failing with messages of this nature: ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave and the kernel ring buffer would have streams of: [673754.825092] xhci_hcd 0000:02:00.0: ERROR Transfer event TRB DMA ptr not part of current TD [673754.830412] xhci_hcd 0000:02:00.0: ERROR Transfer event TRB DMA ptr not part of current TD and: [673429.575699] retire_capture_urb: 596 callbacks suppressed sometimes unplugging/plugging the card would fix this, other times a system reboot was required. Since the upgrade to 14.04 this seems to have got worse in that most of the time it behaves in this manner and the unplugging/plugging approach never works. From a kernel perspective, I was already running a 3.13.x release with 12.04 so there's not been a major update on this front since the upgrade. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: pulseaudio 1:4.0-0ubuntu11.1 ProcVersionSignature: Ubuntu 3.13.0-106.153-generic 3.13.11-ckt39 Uname: Linux 3.13.0-106-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.23 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jon 25970 F.... pulseaudio /dev/snd/pcmC0D0c: jon 25970 F...m pulseaudio /dev/snd/pcmC0D0p: jon 25970 F...m pulseaudio CurrentDesktop: LXDE Date: Fri Jan 13 12:56:13 2017 InstallationDate: Installed on 2013-07-25 (1268 days ago) InstallationMedia: Ubuntu-Server 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130214) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio Symptom: audio UpgradeStatus: Upgraded to trusty on 2016-12-28 (15 days ago) dmi.bios.date: 02/22/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: X9SBAA dmi.board.vendor: Supermicro dmi.board.version: 0123456789 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 17 dmi.chassis.vendor: Supermicro dmi.chassis.version: 0123456789 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd02/22/2013:svnSupermicro:pnX9SBAA:pvr0123456789:rvnSupermicro:rnX9SBAA:rvr0123456789:cvnSupermicro:ct17:cvr0123456789: dmi.product.name: X9SBAA dmi.product.version: 0123456789 dmi.sys.vendor: Supermicro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1656302/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp