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[Bug 1473760] [NEW] Plugable SuperSpeed USB 3.0 no longer works 14.04 LTS

 

Public bug reported:

Until today, my plugable SuperSpeed USB 3.0 has been used successfully to transfer photo files to my computer. Today I receive the following message:  Unable to mount 4.0 GB Volume
Error mounting /dev/sdb at /media/sm/disk: Command-line `mount -t "vfat" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush" "/dev/sdb" "/media/sm/disk"' exited with non-zero exit status 32: mount: /dev/sdb: can't read superblock

sm@MTD1:~$ sudo lsusb -v
[sudo] password for sm: 

Bus 002 Device 004: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x093a Pixart Imaging, Inc.
  idProduct          0x2510 Optical Mouse
  bcdDevice            1.00
  iManufacturer           1 PIXART
  iProduct                2 USB OPTICAL MOUSE
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          4 HID-compliant MOUSE
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      2 Mouse
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      62
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval              10
Device Status:     0x0000
  (Bus Powered)

Bus 002 Device 003: ID 047d:2043 Kensington 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x047d Kensington
  idProduct          0x2043 
  bcdDevice            1.04
  iManufacturer           1 NOVATEK
  iProduct                2 Kensington U+P Keyboard
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           59
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      1 Keyboard
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      65
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     134
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
Device Status:     0x0000
  (Bus Powered)

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         1 Single TT
  bMaxPacketSize0        64
  idVendor           0x8087 Intel Corp.
  idProduct          0x0024 Integrated Rate Matching Hub
  bcdDevice            0.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      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             6
  wHubCharacteristic 0x0009
    Per-port power switching
    Per-port overcurrent protection
    TT think time 8 FS bits
  bPwrOn2PwrGood       50 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00
  PortPwrCtrlMask    0xff
 Hub Port Status:
   Port 1: 0000.0100 power
   Port 2: 0000.0100 power
   Port 3: 0000.0100 power
   Port 4: 0000.0100 power
   Port 5: 0000.0303 lowspeed power enable connect
   Port 6: 0000.0303 lowspeed power enable connect
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         0 Full speed (or root) hub
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         0 Full speed (or root) hub
  bMaxPacketSize0        64
  idVendor           0x1d6b Linux Foundation
  idProduct          0x0002 2.0 root hub
  bcdDevice            3.13
  iManufacturer           3 Linux 3.13.0-57-generic ehci_hcd
  iProduct                2 EHCI Host Controller
  iSerial                 1 0000:00:1d.0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      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     0x0004  1x 4 bytes
        bInterval              12
Hub Descriptor:
  bLength               9
  bDescriptorType      41
  nNbrPorts             2
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood       10 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x02
  PortPwrCtrlMask    0xff
 Hub Port Status:
   Port 1: 0000.0503 highspeed power enable connect
   Port 2: 0000.0100 power
Device Status:     0x0001
  Self Powered

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         1 Single TT
  bMaxPacketSize0        64
  idVendor           0x8087 Intel Corp.
  idProduct          0x0024 Integrated Rate Matching Hub
  bcdDevice            0.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      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 0x0009
    Per-port power switching
    Per-port overcurrent protection
    TT think time 8 FS bits
  bPwrOn2PwrGood       50 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00
  PortPwrCtrlMask    0xff
 Hub Port Status:
   Port 1: 0000.0100 power
   Port 2: 0000.0100 power
   Port 3: 0000.0100 power
   Port 4: 0000.0100 power
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         0 Full speed (or root) hub
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         0 Full speed (or root) hub
  bMaxPacketSize0        64
  idVendor           0x1d6b Linux Foundation
  idProduct          0x0002 2.0 root hub
  bcdDevice            3.13
  iManufacturer           3 Linux 3.13.0-57-generic ehci_hcd
  iProduct                2 EHCI Host Controller
  iSerial                 1 0000:00:1a.0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      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     0x0004  1x 4 bytes
        bInterval              12
Hub Descriptor:
  bLength               9
  bDescriptorType      41
  nNbrPorts             2
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood       10 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x02
  PortPwrCtrlMask    0xff
 Hub Port Status:
   Port 1: 0000.0507 highspeed power suspend enable connect
   Port 2: 0000.0100 power
Device Status:     0x0001
  Self Powered
sm@MTD1:~$ cat /proc/bus/usb/devices
cat: /proc/bus/usb/devices: No such file or directory
sm@MTD1:~$ sudo mount -t usbfs none /proc/bus/usb
mount: mount point /proc/bus/usb does not exist

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/1473760

Title:
  Plugable SuperSpeed USB 3.0 no longer works 14.04 LTS

Status in linux package in Ubuntu:
  New

Bug description:
  Until today, my plugable SuperSpeed USB 3.0 has been used successfully to transfer photo files to my computer. Today I receive the following message:  Unable to mount 4.0 GB Volume
  Error mounting /dev/sdb at /media/sm/disk: Command-line `mount -t "vfat" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush" "/dev/sdb" "/media/sm/disk"' exited with non-zero exit status 32: mount: /dev/sdb: can't read superblock

  sm@MTD1:~$ sudo lsusb -v
  [sudo] password for sm: 

  Bus 002 Device 004: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
  Device Descriptor:
    bLength                18
    bDescriptorType         1
    bcdUSB               1.10
    bDeviceClass            0 (Defined at Interface level)
    bDeviceSubClass         0 
    bDeviceProtocol         0 
    bMaxPacketSize0         8
    idVendor           0x093a Pixart Imaging, Inc.
    idProduct          0x2510 Optical Mouse
    bcdDevice            1.00
    iManufacturer           1 PIXART
    iProduct                2 USB OPTICAL MOUSE
    iSerial                 0 
    bNumConfigurations      1
    Configuration Descriptor:
      bLength                 9
      bDescriptorType         2
      wTotalLength           34
      bNumInterfaces          1
      bConfigurationValue     1
      iConfiguration          4 HID-compliant MOUSE
      bmAttributes         0xa0
        (Bus Powered)
        Remote Wakeup
      MaxPower              100mA
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        0
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         3 Human Interface Device
        bInterfaceSubClass      1 Boot Interface Subclass
        bInterfaceProtocol      2 Mouse
        iInterface              0 
          HID Device Descriptor:
            bLength                 9
            bDescriptorType        33
            bcdHID               1.11
            bCountryCode            0 Not supported
            bNumDescriptors         1
            bDescriptorType        34 Report
            wDescriptorLength      62
           Report Descriptors: 
             ** UNAVAILABLE **
        Endpoint Descriptor:
          bLength                 7
          bDescriptorType         5
          bEndpointAddress     0x81  EP 1 IN
          bmAttributes            3
            Transfer Type            Interrupt
            Synch Type               None
            Usage Type               Data
          wMaxPacketSize     0x0004  1x 4 bytes
          bInterval              10
  Device Status:     0x0000
    (Bus Powered)

  Bus 002 Device 003: ID 047d:2043 Kensington 
  Device Descriptor:
    bLength                18
    bDescriptorType         1
    bcdUSB               1.10
    bDeviceClass            0 (Defined at Interface level)
    bDeviceSubClass         0 
    bDeviceProtocol         0 
    bMaxPacketSize0         8
    idVendor           0x047d Kensington
    idProduct          0x2043 
    bcdDevice            1.04
    iManufacturer           1 NOVATEK
    iProduct                2 Kensington U+P Keyboard
    iSerial                 0 
    bNumConfigurations      1
    Configuration Descriptor:
      bLength                 9
      bDescriptorType         2
      wTotalLength           59
      bNumInterfaces          2
      bConfigurationValue     1
      iConfiguration          0 
      bmAttributes         0xa0
        (Bus Powered)
        Remote Wakeup
      MaxPower              100mA
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        0
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         3 Human Interface Device
        bInterfaceSubClass      1 Boot Interface Subclass
        bInterfaceProtocol      1 Keyboard
        iInterface              0 
          HID Device Descriptor:
            bLength                 9
            bDescriptorType        33
            bcdHID               1.10
            bCountryCode            0 Not supported
            bNumDescriptors         1
            bDescriptorType        34 Report
            wDescriptorLength      65
           Report Descriptors: 
             ** UNAVAILABLE **
        Endpoint Descriptor:
          bLength                 7
          bDescriptorType         5
          bEndpointAddress     0x81  EP 1 IN
          bmAttributes            3
            Transfer Type            Interrupt
            Synch Type               None
            Usage Type               Data
          wMaxPacketSize     0x0008  1x 8 bytes
          bInterval              10
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        1
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         3 Human Interface Device
        bInterfaceSubClass      0 No Subclass
        bInterfaceProtocol      0 None
        iInterface              0 
          HID Device Descriptor:
            bLength                 9
            bDescriptorType        33
            bcdHID               1.10
            bCountryCode            0 Not supported
            bNumDescriptors         1
            bDescriptorType        34 Report
            wDescriptorLength     134
           Report Descriptors: 
             ** UNAVAILABLE **
        Endpoint Descriptor:
          bLength                 7
          bDescriptorType         5
          bEndpointAddress     0x82  EP 2 IN
          bmAttributes            3
            Transfer Type            Interrupt
            Synch Type               None
            Usage Type               Data
          wMaxPacketSize     0x0008  1x 8 bytes
          bInterval              10
  Device Status:     0x0000
    (Bus Powered)

  Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
  Device Descriptor:
    bLength                18
    bDescriptorType         1
    bcdUSB               2.00
    bDeviceClass            9 Hub
    bDeviceSubClass         0 Unused
    bDeviceProtocol         1 Single TT
    bMaxPacketSize0        64
    idVendor           0x8087 Intel Corp.
    idProduct          0x0024 Integrated Rate Matching Hub
    bcdDevice            0.00
    iManufacturer           0 
    iProduct                0 
    iSerial                 0 
    bNumConfigurations      1
    Configuration Descriptor:
      bLength                 9
      bDescriptorType         2
      wTotalLength           25
      bNumInterfaces          1
      bConfigurationValue     1
      iConfiguration          0 
      bmAttributes         0xe0
        Self Powered
        Remote Wakeup
      MaxPower                0mA
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        0
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         9 Hub
        bInterfaceSubClass      0 Unused
        bInterfaceProtocol      0 Full speed (or root) hub
        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             6
    wHubCharacteristic 0x0009
      Per-port power switching
      Per-port overcurrent protection
      TT think time 8 FS bits
    bPwrOn2PwrGood       50 * 2 milli seconds
    bHubContrCurrent      0 milli Ampere
    DeviceRemovable    0x00
    PortPwrCtrlMask    0xff
   Hub Port Status:
     Port 1: 0000.0100 power
     Port 2: 0000.0100 power
     Port 3: 0000.0100 power
     Port 4: 0000.0100 power
     Port 5: 0000.0303 lowspeed power enable connect
     Port 6: 0000.0303 lowspeed power enable connect
  Device Qualifier (for other device speed):
    bLength                10
    bDescriptorType         6
    bcdUSB               2.00
    bDeviceClass            9 Hub
    bDeviceSubClass         0 Unused
    bDeviceProtocol         0 Full speed (or root) hub
    bMaxPacketSize0        64
    bNumConfigurations      1
  Device Status:     0x0001
    Self Powered

  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Device Descriptor:
    bLength                18
    bDescriptorType         1
    bcdUSB               2.00
    bDeviceClass            9 Hub
    bDeviceSubClass         0 Unused
    bDeviceProtocol         0 Full speed (or root) hub
    bMaxPacketSize0        64
    idVendor           0x1d6b Linux Foundation
    idProduct          0x0002 2.0 root hub
    bcdDevice            3.13
    iManufacturer           3 Linux 3.13.0-57-generic ehci_hcd
    iProduct                2 EHCI Host Controller
    iSerial                 1 0000:00:1d.0
    bNumConfigurations      1
    Configuration Descriptor:
      bLength                 9
      bDescriptorType         2
      wTotalLength           25
      bNumInterfaces          1
      bConfigurationValue     1
      iConfiguration          0 
      bmAttributes         0xe0
        Self Powered
        Remote Wakeup
      MaxPower                0mA
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        0
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         9 Hub
        bInterfaceSubClass      0 Unused
        bInterfaceProtocol      0 Full speed (or root) hub
        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     0x0004  1x 4 bytes
          bInterval              12
  Hub Descriptor:
    bLength               9
    bDescriptorType      41
    nNbrPorts             2
    wHubCharacteristic 0x000a
      No power switching (usb 1.0)
      Per-port overcurrent protection
    bPwrOn2PwrGood       10 * 2 milli seconds
    bHubContrCurrent      0 milli Ampere
    DeviceRemovable    0x02
    PortPwrCtrlMask    0xff
   Hub Port Status:
     Port 1: 0000.0503 highspeed power enable connect
     Port 2: 0000.0100 power
  Device Status:     0x0001
    Self Powered

  Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
  Device Descriptor:
    bLength                18
    bDescriptorType         1
    bcdUSB               2.00
    bDeviceClass            9 Hub
    bDeviceSubClass         0 Unused
    bDeviceProtocol         1 Single TT
    bMaxPacketSize0        64
    idVendor           0x8087 Intel Corp.
    idProduct          0x0024 Integrated Rate Matching Hub
    bcdDevice            0.00
    iManufacturer           0 
    iProduct                0 
    iSerial                 0 
    bNumConfigurations      1
    Configuration Descriptor:
      bLength                 9
      bDescriptorType         2
      wTotalLength           25
      bNumInterfaces          1
      bConfigurationValue     1
      iConfiguration          0 
      bmAttributes         0xe0
        Self Powered
        Remote Wakeup
      MaxPower                0mA
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        0
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         9 Hub
        bInterfaceSubClass      0 Unused
        bInterfaceProtocol      0 Full speed (or root) hub
        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 0x0009
      Per-port power switching
      Per-port overcurrent protection
      TT think time 8 FS bits
    bPwrOn2PwrGood       50 * 2 milli seconds
    bHubContrCurrent      0 milli Ampere
    DeviceRemovable    0x00
    PortPwrCtrlMask    0xff
   Hub Port Status:
     Port 1: 0000.0100 power
     Port 2: 0000.0100 power
     Port 3: 0000.0100 power
     Port 4: 0000.0100 power
  Device Qualifier (for other device speed):
    bLength                10
    bDescriptorType         6
    bcdUSB               2.00
    bDeviceClass            9 Hub
    bDeviceSubClass         0 Unused
    bDeviceProtocol         0 Full speed (or root) hub
    bMaxPacketSize0        64
    bNumConfigurations      1
  Device Status:     0x0001
    Self Powered

  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Device Descriptor:
    bLength                18
    bDescriptorType         1
    bcdUSB               2.00
    bDeviceClass            9 Hub
    bDeviceSubClass         0 Unused
    bDeviceProtocol         0 Full speed (or root) hub
    bMaxPacketSize0        64
    idVendor           0x1d6b Linux Foundation
    idProduct          0x0002 2.0 root hub
    bcdDevice            3.13
    iManufacturer           3 Linux 3.13.0-57-generic ehci_hcd
    iProduct                2 EHCI Host Controller
    iSerial                 1 0000:00:1a.0
    bNumConfigurations      1
    Configuration Descriptor:
      bLength                 9
      bDescriptorType         2
      wTotalLength           25
      bNumInterfaces          1
      bConfigurationValue     1
      iConfiguration          0 
      bmAttributes         0xe0
        Self Powered
        Remote Wakeup
      MaxPower                0mA
      Interface Descriptor:
        bLength                 9
        bDescriptorType         4
        bInterfaceNumber        0
        bAlternateSetting       0
        bNumEndpoints           1
        bInterfaceClass         9 Hub
        bInterfaceSubClass      0 Unused
        bInterfaceProtocol      0 Full speed (or root) hub
        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     0x0004  1x 4 bytes
          bInterval              12
  Hub Descriptor:
    bLength               9
    bDescriptorType      41
    nNbrPorts             2
    wHubCharacteristic 0x000a
      No power switching (usb 1.0)
      Per-port overcurrent protection
    bPwrOn2PwrGood       10 * 2 milli seconds
    bHubContrCurrent      0 milli Ampere
    DeviceRemovable    0x02
    PortPwrCtrlMask    0xff
   Hub Port Status:
     Port 1: 0000.0507 highspeed power suspend enable connect
     Port 2: 0000.0100 power
  Device Status:     0x0001
    Self Powered
  sm@MTD1:~$ cat /proc/bus/usb/devices
  cat: /proc/bus/usb/devices: No such file or directory
  sm@MTD1:~$ sudo mount -t usbfs none /proc/bus/usb
  mount: mount point /proc/bus/usb does not exist

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