Okay, I am confused now. I have another system for with usb DAC works just fine.
Distributor ID: Ubuntu Description: Ubuntu 18.10 Release: 18.10 Codename: cosmic Linux 4.18.0-13-generic x86_64 And dmesg show me same issue: [ 3649.034233] usb 3-1: new full-speed USB device number 2 using xhci_hcd [ 3649.651192] usb 3-1: New USB device found, idVendor=2912, idProduct=120b, bcdDevice= 1.0c [ 3649.651199] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 3649.651204] usb 3-1: Product: Audioengine D3 [ 3649.651208] usb 3-1: Manufacturer: Audioengine [ 3649.651212] usb 3-1: SerialNumber: Audioengine [ 3649.696266] usb 3-1: 1:1: cannot get freq at ep 0x1 [ 3649.719070] usbcore: registered new interface driver snd-usb-audio [ 3649.762678] usb 3-1: 1:1: cannot get freq at ep 0x1 [ 3649.785497] usb 3-1: 1:1: cannot get freq at ep 0x1 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1811999 Title: [USB-Audio - Audioengine D3, playback] fails after a while (a second) Status in alsa-driver package in Ubuntu: New Bug description: USB DAC stops playing sound after a second. I had problem with kernel 4.15. So, I tried upgrading to 4.19 but still issue persists. I think, we might need to add it to sound/usb/quirks.c I see following in dmesg [ 5937.978117] usb 1-1.4.2: USB disconnect, device number 16 [ 5955.721597] usb 1-1.4.1: new full-speed USB device number 17 using xhci_hcd [ 5956.302910] usb 1-1.4.1: New USB device found, idVendor=2912, idProduct=120b, bcdDevice= 1.0c [ 5956.302917] usb 1-1.4.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 5956.302921] usb 1-1.4.1: Product: Audioengine D3 [ 5956.302926] usb 1-1.4.1: Manufacturer: Audioengine [ 5956.302929] usb 1-1.4.1: SerialNumber: Audioengine [ 5956.320621] usb 1-1.4.1: 1:1: cannot get freq at ep 0x1 [ 5956.920844] usb 1-1.4.1: 1:1: cannot get freq at ep 0x1 [ 5956.938929] usb 1-1.4.1: 1:1: cannot get freq at ep 0x1 And lsusb -v has following entry for the device. Bus 001 Device 017: ID 2912:120b Couldn't open device, some information will be missing Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x2912 idProduct 0x120b bcdDevice 1.0c iManufacturer 1 iProduct 2 iSerial 3 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 131 bNumInterfaces 2 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 200mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 43 bInCollection 1 baInterfaceNr( 0) 1 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 5 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 13 bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 7 bSourceID 5 bControlSize 2 bmaControls( 0) 0x01 bmaControls( 0) 0x00 Mute Control bmaControls( 1) 0x02 bmaControls( 1) 0x00 Volume Control bmaControls( 2) 0x02 bmaControls( 2) 0x00 Volume Control iFeature 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 8 wTerminalType 0x0301 Speaker bAssocTerminal 0 bSourceID 7 iTerminal 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 1 bNumEndpoints 2 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 0 AudioStreaming Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 5 bDelay 1 frames wFormatTag 1 PCM AudioStreaming Interface Descriptor: bLength 20 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bNrChannels 2 bSubframeSize 3 bBitResolution 24 bSamFreqType 4 Discrete tSamFreq[ 0] 44100 tSamFreq[ 1] 48000 tSamFreq[ 2] 88200 tSamFreq[ 3] 96000 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x024c 1x 588 bytes bInterval 1 bRefresh 0 bSynchAddress 131 AudioControl Endpoint Descriptor: bLength 7 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x01 Sampling Frequency bLockDelayUnits 0 Undefined wLockDelay 0 Undefined Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0003 1x 3 bytes bInterval 1 bRefresh 5 bSynchAddress 0 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 Uname: Linux 4.19.15-041915-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: wolf 3380 F.... pulseaudio /dev/snd/pcmC1D0p: wolf 3380 F...m pulseaudio /dev/snd/controlC0: wolf 3380 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Wed Jan 16 14:43:03 2019 EcryptfsInUse: Yes InstallationDate: Installed on 2018-03-07 (315 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_Card: Audioengine D3 - Audioengine D3 Symptom_PulseAudioLog: Jan 16 12:18:52 usmanz dbus-daemon[1469]: [system] Activating via systemd: service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' requested by ':1.32' (uid=121 pid=2077 comm="/usr/bin/pulseaudio --daemonize=no ") Jan 16 12:18:52 usmanz pulseaudio[2077]: W: [pulseaudio] sink.c: Default and alternate sample rates are the same. Symptom_Type: Sound works for a while, then breaks Title: [USB-Audio - Audioengine D3, playback] fails after a while UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/04/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.6.3 dmi.board.name: 0F6P3V dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.6.3:bd11/04/2018:svnDellInc.:pnXPS139370:pvr:rvnDellInc.:rn0F6P3V:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9370 dmi.product.sku: 07E6 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1811999/+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