[Bug 34002] USB soundcard unusable through usb-hub

HÃ¥vard H. Garnes hhgarnes at gmail.com
Tue Mar 7 18:41:51 UTC 2006


Public bug report changed:
https://launchpad.net/malone/bugs/34002

Description changed to:
    When I try using my USB-soundcard through my USB-hub, the kernel
    spews this error into the logs _a_lot_:

    cannot submit datapipe for urb 0, err = -38

    and errormessages from the program goes like "pipe error", or 
    ALSA lib pcm_direct.c:900:(snd_pcm_direct_initialize_slave) unable to install hw params

    The soundcard worked fine in 2.6.12-10, the latest kernel in breezy.
    If I plug it directly into the computer it works as it should.

    lsusb -v: (while directly linked to computer, linked via hub below,
    hub at bottom)

    Bus 001 Device 010: ID 041e:3010 Creative Technology, Ltd SoundBlaster MP3+
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            0 (Defined at Interface level)
      bDeviceSubClass         0
      bDeviceProtocol         0
      bMaxPacketSize0        64
      idVendor           0x041e Creative Technology, Ltd
      idProduct          0x3010 SoundBlaster MP3+
      bcdDevice            1.00
      iManufacturer           0
      iProduct                1 USB Audio
      iSerial                 0
      bNumConfigurations      1
      Configuration Descriptor:
        bLength                 9
        bDescriptorType         2
        wTotalLength          294
        bNumInterfaces          3
        bConfigurationValue     1
        iConfiguration          0
        bmAttributes         0x80
          (Bus Powered)
        MaxPower              500mA
        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                10
            bDescriptorType        36
            bDescriptorSubtype      1 (HEADER)
            bcdADC               1.00
            wTotalLength          169
            bInCollection           2
            baInterfaceNr( 0)       1
            baInterfaceNr( 1)       2
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             1
            wTerminalType      0x0101 USB Streaming
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             2
            wTerminalType      0x0201 Microphone
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             3
            wTerminalType      0x0603 Line Connector
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             4
            wTerminalType      0x0605 SPDIF interface
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             5
            wTerminalType      0x0605 SPDIF interface
            bAssocTerminal          0
            bSourceID               1
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             6
            wTerminalType      0x0301 Speaker
            bAssocTerminal          0
            bSourceID               9
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             7
            wTerminalType      0x0101 USB Streaming
            bAssocTerminal          0
            bSourceID               8
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      5 (SELECTOR_UNIT)
            bUnitID                 8
            bNrInPins               3
            baSource( 0)           10
            baSource( 1)           11
            baSource( 2)           12
            iSelector               0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                 9
            bSourceID              15
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x02
              Volume
            bmaControls( 2)      0x02
              Volume
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                10
            bSourceID               2
            bControlSize            1
            bmaControls( 0)      0x43
              Mute
              Volume
              Automatic Gain
            bmaControls( 1)      0x00
            bmaControls( 2)      0x00
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                11
            bSourceID               3
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x02
              Volume
            bmaControls( 2)      0x02
              Volume
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                12
            bSourceID               4
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x00
            bmaControls( 2)      0x00
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                13
            bSourceID               2
            bControlSize            1
            bmaControls( 0)      0x03
              Mute
              Volume
            bmaControls( 1)      0x00
            bmaControls( 2)      0x00
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                14
            bSourceID               3
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x02
              Volume
            bmaControls( 2)      0x02
              Volume
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                15
            bDescriptorType        36
            bDescriptorSubtype      4 (MIXER_UNIT)
            bUnitID                15
            bNrInPins               3
            baSourceID( 0)          1
            baSourceID( 1)         13
            baSourceID( 2)         14
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            bmControls         0x00
            iMixer                  0
            junk at descriptor end: 00
        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           1
          bInterfaceClass         1 Audio
          bInterfaceSubClass      2 Streaming
          bInterfaceProtocol      0
          iInterface              0
          AudioStreaming Interface Descriptor:
            bLength                 7
            bDescriptorType        36
            bDescriptorSubtype      1 (AS_GENERAL)
            bTerminalLink           1
            bDelay                  3 frames
            wFormatTag              1 PCM
          AudioStreaming Interface Descriptor:
            bLength                11
            bDescriptorType        36
            bDescriptorSubtype      2 (FORMAT_TYPE)
            bFormatType             1 (FORMAT_TYPE_I)
            bNrChannels             2
            bSubframeSize           2
            bBitResolution         16
            bSamFreqType            1 Discrete
            tSamFreq[ 0]        48000
          Endpoint Descriptor:
            bLength                 9
            bDescriptorType         5
            bEndpointAddress     0x01  EP 1 OUT
            bmAttributes            9
              Transfer Type            Isochronous
              Synch Type               Adaptive
              Usage Type               Data
            wMaxPacketSize     0x00c8  1x 200 bytes
            bInterval               1
            bRefresh                0
            bSynchAddress           0
            AudioControl Endpoint Descriptor:
              bLength                 7
              bDescriptorType        37
              bDescriptorSubtype      1 (EP_GENERAL)
              bmAttributes         0x00
              bLockDelayUnits         1 Milliseconds
              wLockDelay              4 Milliseconds
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        2
          bAlternateSetting       0
          bNumEndpoints           0
          bInterfaceClass         1 Audio
          bInterfaceSubClass      2 Streaming
          bInterfaceProtocol      0
          iInterface              0
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        2
          bAlternateSetting       1
          bNumEndpoints           1
          bInterfaceClass         1 Audio
          bInterfaceSubClass      2 Streaming
          bInterfaceProtocol      0
          iInterface              0
          AudioStreaming Interface Descriptor:
            bLength                 7
            bDescriptorType        36
            bDescriptorSubtype      1 (AS_GENERAL)
            bTerminalLink           7
            bDelay                  1 frames
            wFormatTag              1 PCM
          AudioStreaming Interface Descriptor:
            bLength                14
            bDescriptorType        36
            bDescriptorSubtype      2 (FORMAT_TYPE)
            bFormatType             1 (FORMAT_TYPE_I)
            bNrChannels             2
            bSubframeSize           2
            bBitResolution         16
            bSamFreqType            2 Discrete
            tSamFreq[ 0]        48000
            tSamFreq[ 1]        44100
          Endpoint Descriptor:
            bLength                 9
            bDescriptorType         5
            bEndpointAddress     0x82  EP 2 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x00c8  1x 200 bytes
            bInterval               1
            bRefresh                0
            bSynchAddress           0
            AudioControl Endpoint Descriptor:
              bLength                 7
              bDescriptorType        37
              bDescriptorSubtype      1 (EP_GENERAL)
              bmAttributes         0x01
                Sampling Frequency
              bLockDelayUnits         0 Undefined
              wLockDelay              0 Undefined
    Device Status:     0x0000
      (Bus Powered)


    
    -----------------------------------------------------------------------------------------------------------------

    Linked via hub:

    Bus 003 Device 010: ID 041e:3010 Creative Technology, Ltd SoundBlaster MP3+
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            0 (Defined at Interface level)
      bDeviceSubClass         0
      bDeviceProtocol         0
      bMaxPacketSize0        64
      idVendor           0x041e Creative Technology, Ltd
      idProduct          0x3010 SoundBlaster MP3+
      bcdDevice            1.00
      iManufacturer           0
      iProduct                1 USB Audio
      iSerial                 0
      bNumConfigurations      1
      Configuration Descriptor:
        bLength                 9
        bDescriptorType         2
        wTotalLength          294
        bNumInterfaces          3
        bConfigurationValue     1
        iConfiguration          0
        bmAttributes         0x80
          (Bus Powered)
        MaxPower              500mA
        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                10
            bDescriptorType        36
            bDescriptorSubtype      1 (HEADER)
            bcdADC               1.00
            wTotalLength          169
            bInCollection           2
            baInterfaceNr( 0)       1
            baInterfaceNr( 1)       2
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             1
            wTerminalType      0x0101 USB Streaming
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             2
            wTerminalType      0x0201 Microphone
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             3
            wTerminalType      0x0603 Line Connector
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                12
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             4
            wTerminalType      0x0605 SPDIF interface
            bAssocTerminal          0
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             5
            wTerminalType      0x0605 SPDIF interface
            bAssocTerminal          0
            bSourceID               1
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             6
            wTerminalType      0x0301 Speaker
            bAssocTerminal          0
            bSourceID               9
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             7
            wTerminalType      0x0101 USB Streaming
            bAssocTerminal          0
            bSourceID               8
            iTerminal               0
          AudioControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      5 (SELECTOR_UNIT)
            bUnitID                 8
            bNrInPins               3
            baSource( 0)           10
            baSource( 1)           11
            baSource( 2)           12
            iSelector               0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                 9
            bSourceID              15
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x02
              Volume
            bmaControls( 2)      0x02
              Volume
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                10
            bSourceID               2
            bControlSize            1
            bmaControls( 0)      0x43
              Mute
              Volume
              Automatic Gain
            bmaControls( 1)      0x00
            bmaControls( 2)      0x00
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                11
            bSourceID               3
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x02
              Volume
            bmaControls( 2)      0x02
              Volume
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                12
            bSourceID               4
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x00
            bmaControls( 2)      0x00
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                13
            bSourceID               2
            bControlSize            1
            bmaControls( 0)      0x03
              Mute
              Volume
            bmaControls( 1)      0x00
            bmaControls( 2)      0x00
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                10
            bDescriptorType        36
            bDescriptorSubtype      6 (FEATURE_UNIT)
            bUnitID                14
            bSourceID               3
            bControlSize            1
            bmaControls( 0)      0x01
              Mute
            bmaControls( 1)      0x02
              Volume
            bmaControls( 2)      0x02
              Volume
            iFeature                0
          AudioControl Interface Descriptor:
            bLength                15
            bDescriptorType        36
            bDescriptorSubtype      4 (MIXER_UNIT)
            bUnitID                15
            bNrInPins               3
            baSourceID( 0)          1
            baSourceID( 1)         13
            baSourceID( 2)         14
            bNrChannels             2
            wChannelConfig     0x0003
              Left Front (L)
              Right Front (R)
            iChannelNames           0
            bmControls         0x00
            iMixer                  0
            junk at descriptor end: 00
        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           1
          bInterfaceClass         1 Audio
          bInterfaceSubClass      2 Streaming
          bInterfaceProtocol      0
          iInterface              0
          AudioStreaming Interface Descriptor:
            bLength                 7
            bDescriptorType        36
            bDescriptorSubtype      1 (AS_GENERAL)
            bTerminalLink           1
            bDelay                  3 frames
            wFormatTag              1 PCM
          AudioStreaming Interface Descriptor:
            bLength                11
            bDescriptorType        36
            bDescriptorSubtype      2 (FORMAT_TYPE)
            bFormatType             1 (FORMAT_TYPE_I)
            bNrChannels             2
            bSubframeSize           2
            bBitResolution         16
            bSamFreqType            1 Discrete
            tSamFreq[ 0]        48000
          Endpoint Descriptor:
            bLength                 9
            bDescriptorType         5
            bEndpointAddress     0x01  EP 1 OUT
            bmAttributes            9
              Transfer Type            Isochronous
              Synch Type               Adaptive
              Usage Type               Data
            wMaxPacketSize     0x00c8  1x 200 bytes
            bInterval               1
            bRefresh                0
            bSynchAddress           0
            AudioControl Endpoint Descriptor:
              bLength                 7
              bDescriptorType        37
              bDescriptorSubtype      1 (EP_GENERAL)
              bmAttributes         0x00
              bLockDelayUnits         1 Milliseconds
              wLockDelay              4 Milliseconds
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        2
          bAlternateSetting       0
          bNumEndpoints           0
          bInterfaceClass         1 Audio
          bInterfaceSubClass      2 Streaming
          bInterfaceProtocol      0
          iInterface              0
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        2
          bAlternateSetting       1
          bNumEndpoints           1
          bInterfaceClass         1 Audio
          bInterfaceSubClass      2 Streaming
          bInterfaceProtocol      0
          iInterface              0
          AudioStreaming Interface Descriptor:
            bLength                 7
            bDescriptorType        36
            bDescriptorSubtype      1 (AS_GENERAL)
            bTerminalLink           7
            bDelay                  1 frames
            wFormatTag              1 PCM
          AudioStreaming Interface Descriptor:
            bLength                14
            bDescriptorType        36
            bDescriptorSubtype      2 (FORMAT_TYPE)
            bFormatType             1 (FORMAT_TYPE_I)
            bNrChannels             2
            bSubframeSize           2
            bBitResolution         16
            bSamFreqType            2 Discrete
            tSamFreq[ 0]        48000
            tSamFreq[ 1]        44100
          Endpoint Descriptor:
            bLength                 9
            bDescriptorType         5
            bEndpointAddress     0x82  EP 2 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x00c8  1x 200 bytes
            bInterval               1
            bRefresh                0
            bSynchAddress           0
            AudioControl Endpoint Descriptor:
              bLength                 7
              bDescriptorType        37
              bDescriptorSubtype      1 (EP_GENERAL)
              bmAttributes         0x01
                Sampling Frequency
              bLockDelayUnits         0 Undefined
              wLockDelay              0 Undefined
    Device Status:     0x0000
      (Bus Powered)

    -------------------------------------------------------------------------------------------------------------

    The hub:

    Bus 003 Device 002: ID 04b4:6560 Cypress Semiconductor Corp. CY7C65640 USB-2.0 "TetraHub"
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               2.00
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         2 TT per port
      bMaxPacketSize0        64
      idVendor           0x04b4 Cypress Semiconductor Corp.
      idProduct          0x6560 CY7C65640 USB-2.0 "TetraHub"
      bcdDevice            0.08
      iManufacturer           0
      iProduct                0
      iSerial                 0
      bNumConfigurations      1
      Configuration Descriptor:
        bLength                 9
        bDescriptorType         2
        wTotalLength           41
        bNumInterfaces          1
        bConfigurationValue     1
        iConfiguration          0
        bmAttributes         0xe0
          Self Powered
          Remote Wakeup
        MaxPower              100mA
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        0
          bAlternateSetting       0
          bNumEndpoints           1
          bInterfaceClass         9 Hub
          bInterfaceSubClass      0 Unused
          bInterfaceProtocol      1 Single TT
          iInterface              0
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            3
              Transfer Type            Interrupt
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0001  1x 1 bytes
            bInterval              12
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        0
          bAlternateSetting       1
          bNumEndpoints           1
          bInterfaceClass         9 Hub
          bInterfaceSubClass      0 Unused
          bInterfaceProtocol      2 TT per port
          iInterface              0
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            3
              Transfer Type            Interrupt
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0001  1x 1 bytes
            bInterval              12
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             4
      wHubCharacteristic 0x0089
        Per-port power switching
        Per-port overcurrent protection
        TT think time 8 FS bits
        Port indicators
      bPwrOn2PwrGood       50 * 2 milli seconds
      bHubContrCurrent    100 milli Ampere
      DeviceRemovable    0xf8
      PortPwrCtrlMask    0xc0
     Hub Port Status:
       Port 1: 0000.0303 lowspeed power enable connect
       Port 2: 0000.0100 power
       Port 3: 0000.0100 power
       Port 4: 0000.0103 power enable connect
    Device Qualifier (for other device speed):
      bLength                10
      bDescriptorType         6
      bcdUSB               2.00
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0
      bMaxPacketSize0        64
      bNumConfigurations      1
    Device Status:     0x0001
      Self Powered




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