Re: Behringer UMC202HD issues and a partial solution

Thank you very much for the kind reply.

You made the dmesg warning go away, but that didn't necessarily solve the underlying issue. May I ask that you post the "lsusb -v -d 1397:0507" ?

Here it is, connected to a USB 2.0 port (xHCI still enabled).

$ lsusb -v -d 1397:0507 > lsusb_-v.txt can't get debug descriptor: Resource temporarily unavailable

Bus 003 Device 011: ID 1397:0507 BEHRINGER International GmbH UMC202HD 192k Device Descriptor:   bLength                18   bDescriptorType         1   bcdUSB               2.00   bDeviceClass          239 Miscellaneous Device   bDeviceSubClass         2   bDeviceProtocol         1 Interface Association   bMaxPacketSize0        64   idVendor           0x1397 BEHRINGER International GmbH   idProduct          0x0507   bcdDevice            1.00   iManufacturer           1 BEHRINGER   iProduct                2 UMC202HD 192k   iSerial                 3 12345678   bNumConfigurations      1   Configuration Descriptor:     bLength                 9     bDescriptorType         2     wTotalLength       0x011d     bNumInterfaces          4     bConfigurationValue     1     iConfiguration          0     bmAttributes         0x80       (Bus Powered)     MaxPower              500mA     Interface Association:       bLength                 8       bDescriptorType        11       bFirstInterface         0       bInterfaceCount         3       bFunctionClass          1 Audio       bFunctionSubClass       0       bFunctionProtocol      32       iFunction               0     Interface Descriptor:       bLength                 9       bDescriptorType         4       bInterfaceNumber        0       bAlternateSetting       0       bNumEndpoints           1       bInterfaceClass         1 Audio       bInterfaceSubClass      1 Control Device       bInterfaceProtocol     32       iInterface              0       AudioControl Interface Descriptor:         bLength                 9         bDescriptorType        36         bDescriptorSubtype      1 (HEADER)         bcdADC               2.00         bCategory               8         wTotalLength       0x0077         bmControls           0x01           Latency control Control (read-only)       AudioControl Interface Descriptor:         bLength                 8         bDescriptorType        36         bDescriptorSubtype     10 (CLOCK_SOURCE)         bClockID               41         bmAttributes            3 Internal programmable clock         bmControls           0x07           Clock Frequency Control (read/write)           Clock Validity Control (read-only)         bAssocTerminal          0         iClockSource           10 Internal       AudioControl Interface Descriptor:         bLength                 8         bDescriptorType        36         bDescriptorSubtype     11 (CLOCK_SELECTOR)         bClockID               40         bNrInPins               1         baCSourceID(0)         41         bmControls           0x03           Clock Selector Control (read/write)         iClockSelector          0       AudioControl Interface Descriptor:         bLength                17         bDescriptorType        36         bDescriptorSubtype      2 (INPUT_TERMINAL)         bTerminalID             2         wTerminalType      0x0101 USB Streaming         bAssocTerminal          0         bCSourceID             40         bNrChannels             2         bmChannelConfig    0x00000000         iChannelNames         192 Out 1         bmControls         0x0000         iTerminal               0       AudioControl Interface Descriptor:         bLength                18         bDescriptorType        36         bDescriptorSubtype      6 (FEATURE_UNIT)         bUnitID                10         bSourceID               2         bmaControls(0)     0x0000000f           Mute Control (read/write)           Volume Control (read/write)         bmaControls(1)     0x0000000f           Mute Control (read/write)           Volume Control (read/write)         bmaControls(2)     0x0000000f           Mute Control (read/write)           Volume Control (read/write)         iFeature                0       AudioControl Interface Descriptor:         bLength                12         bDescriptorType        36         bDescriptorSubtype      3 (OUTPUT_TERMINAL)         bTerminalID            20         wTerminalType      0x0301 Speaker         bAssocTerminal          0         bSourceID              10         bCSourceID             40         bmControls         0x0000         iTerminal               0       AudioControl Interface Descriptor:         bLength                17         bDescriptorType        36         bDescriptorSubtype      2 (INPUT_TERMINAL)         bTerminalID             1         wTerminalType      0x0201 Microphone         bAssocTerminal          0         bCSourceID             40         bNrChannels             2         bmChannelConfig    0x00000000         iChannelNames         128 In 1         bmControls         0x0000         iTerminal               0       AudioControl Interface Descriptor:         bLength                18         bDescriptorType        36         bDescriptorSubtype      6 (FEATURE_UNIT)         bUnitID                11         bSourceID               1         bmaControls(0)     0x0000000f           Mute Control (read/write)           Volume Control (read/write)         bmaControls(1)     0x0000000f           Mute Control (read/write)           Volume Control (read/write)         bmaControls(2)     0x0000000f           Mute Control (read/write)           Volume Control (read/write)         iFeature                0       AudioControl Interface Descriptor:         bLength                12         bDescriptorType        36         bDescriptorSubtype      3 (OUTPUT_TERMINAL)         bTerminalID            22         wTerminalType      0x0101 USB Streaming         bAssocTerminal          0         bSourceID              11         bCSourceID             40         bmControls         0x0000         iTerminal               0       Endpoint Descriptor:         bLength                 7         bDescriptorType         5         bEndpointAddress     0x81  EP 1 IN         bmAttributes            3           Transfer Type            Interrupt           Synch Type               None           Usage Type               Data         wMaxPacketSize     0x0006  1x 6 bytes         bInterval               8     Interface Descriptor:       bLength                 9       bDescriptorType         4       bInterfaceNumber        1       bAlternateSetting       0       bNumEndpoints           0       bInterfaceClass         1 Audio       bInterfaceSubClass      2 Streaming       bInterfaceProtocol     32       iInterface              0     Interface Descriptor:       bLength                 9       bDescriptorType         4       bInterfaceNumber        1       bAlternateSetting       1       bNumEndpoints           2       bInterfaceClass         1 Audio       bInterfaceSubClass      2 Streaming       bInterfaceProtocol     32       iInterface              0       AudioStreaming Interface Descriptor:         bLength                16         bDescriptorType        36         bDescriptorSubtype      1 (AS_GENERAL)         bTerminalLink           2         bmControls           0x00         bFormatType             1         bmFormats          0x00000001           PCM         bNrChannels             2         bmChannelConfig    0x00000000         iChannelNames         192 Out 1       AudioStreaming Interface Descriptor:         bLength                 6         bDescriptorType        36         bDescriptorSubtype      2 (FORMAT_TYPE)         bFormatType             1 (FORMAT_TYPE_I)         bSubslotSize            4         bBitResolution         24       Endpoint Descriptor:         bLength                 7         bDescriptorType         5         bEndpointAddress     0x08  EP 8 OUT         bmAttributes            5           Transfer Type            Isochronous           Synch Type               Asynchronous           Usage Type               Data         wMaxPacketSize     0x0190  1x 400 bytes         bInterval               1         AudioStreaming Endpoint Descriptor:           bLength                 8           bDescriptorType        37           bDescriptorSubtype      1 (EP_GENERAL)           bmAttributes         0x00           bmControls           0x00           bLockDelayUnits         2 Decoded PCM samples           wLockDelay         0x0008       Endpoint Descriptor:         bLength                 7         bDescriptorType         5         bEndpointAddress     0x84  EP 4 IN         bmAttributes           17           Transfer Type            Isochronous           Synch Type               None           Usage Type               Feedback         wMaxPacketSize     0x0004  1x 4 bytes         bInterval               4     Interface Descriptor:       bLength                 9       bDescriptorType         4       bInterfaceNumber        2       bAlternateSetting       0       bNumEndpoints           0       bInterfaceClass         1 Audio       bInterfaceSubClass      2 Streaming       bInterfaceProtocol     32       iInterface              0     Interface Descriptor:       bLength                 9       bDescriptorType         4       bInterfaceNumber        2       bAlternateSetting       1       bNumEndpoints           1       bInterfaceClass         1 Audio       bInterfaceSubClass      2 Streaming       bInterfaceProtocol     32       iInterface              0       AudioStreaming Interface Descriptor:         bLength                16         bDescriptorType        36         bDescriptorSubtype      1 (AS_GENERAL)         bTerminalLink          22         bmControls           0x00         bFormatType             1         bmFormats          0x00000001           PCM         bNrChannels             2         bmChannelConfig    0x00000000         iChannelNames         128 In 1       AudioStreaming Interface Descriptor:         bLength                 6         bDescriptorType        36         bDescriptorSubtype      2 (FORMAT_TYPE)         bFormatType             1 (FORMAT_TYPE_I)         bSubslotSize            4         bBitResolution         24       Endpoint Descriptor:         bLength                 7         bDescriptorType         5         bEndpointAddress     0x88  EP 8 IN         bmAttributes           37           Transfer Type            Isochronous           Synch Type               Asynchronous           Usage Type               Implicit feedback Data         wMaxPacketSize     0x0190  1x 400 bytes         bInterval               1         AudioStreaming Endpoint Descriptor:           bLength                 8           bDescriptorType        37           bDescriptorSubtype      1 (EP_GENERAL)           bmAttributes         0x00           bmControls           0x00           bLockDelayUnits         2 Decoded PCM samples           wLockDelay         0x0008     Interface Descriptor:       bLength                 9       bDescriptorType         4       bInterfaceNumber        5       bAlternateSetting       0       bNumEndpoints           1       bInterfaceClass       255 Vendor Specific Class       bInterfaceSubClass      1       bInterfaceProtocol     16       iInterface              0       Endpoint Descriptor:         bLength                 7         bDescriptorType         5         bEndpointAddress     0x85  EP 5 IN         bmAttributes            3           Transfer Type            Interrupt           Synch Type               None           Usage Type               Data         wMaxPacketSize     0x0008  1x 8 bytes         bInterval               8 Device Qualifier (for other device speed):   bLength                10   bDescriptorType         6   bcdUSB               2.00   bDeviceClass          239 Miscellaneous Device   bDeviceSubClass         2   bDeviceProtocol         1 Interface Association   bMaxPacketSize0         8   bNumConfigurations      1 Device Status:     0x0000   (Bus Powered)

I may ask you to activate dyndbg for the snd-usb-audio module next.

I'll try soon.

Seems to be a different revision indeed, but don't worry, most of the time these bugs are fixable.

Thank you. Happy to participate!