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Thread: SD cards don't work until reboot

  1. #1
    Join Date
    Nov 2012
    Beans
    12

    Question SD cards don't work until reboot

    So, I plug my SD card into the internal slot on my HP Mini running Lubuntu 12.04 (actually Zorin Lite, but it isn't really different at all). It works. I plug in an USB SD adapter into a USB port, it turns on. The Disk Utility shows the internal SD card and an empty USB reader. The reader has an SD card in it. Now, the reader is old and might be broken, I don't know. The problem is when I unmount my internal SD card, I cannot use any SD cards until I reboot, which is very annoying. The drives do not show up in the Disk Utility or GParted, and I have blindly attempted mounting /dev/sdb1, etc. but none work.

    What I have tried:
    "fdisk -l" returns my hard drive, nothing else.

    Here is the output of "lsusb -v" with the SD card plugged in:
    Code:
    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            3.02
      iManufacturer           3 Linux 3.2.0-40-generic ehci_hcd
      iProduct                2 EHCI Host Controller
      iSerial                 1 0000:00:1d.7
      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              11
      bDescriptorType      41
      nNbrPorts             8
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood       10 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00 0x00
      PortPwrCtrlMask    0xff 0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
       Port 3: 0000.0100 power
       Port 4: 0000.0507 highspeed power suspend enable connect
       Port 5: 0000.0501 highspeed power connect
       Port 6: 0000.0100 power
       Port 7: 0000.0100 power
       Port 8: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI 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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI Host Controller
      iSerial                 1 0000:00:1d.1
      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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI Host Controller
      iSerial                 1 0000:00:1d.2
      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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI Host Controller
      iSerial                 1 0000:00:1d.3
      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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 001 Device 002: ID 0408:0ff1 Quanta Computer, Inc. 
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               2.00
      bDeviceClass          239 Miscellaneous Device
      bDeviceSubClass         2 ?
      bDeviceProtocol         1 Interface Association
      bMaxPacketSize0        64
      idVendor           0x0408 Quanta Computer, Inc.
      idProduct          0x0ff1 
      bcdDevice            1.04
      iManufacturer           2 QCM
      iProduct                1 HP Webcam-50
      iSerial                 3 SN001
      bNumConfigurations      1
      Configuration Descriptor:
        bLength                 9
        bDescriptorType         2
        wTotalLength          509
        bNumInterfaces          2
        bConfigurationValue     1
        iConfiguration          0 
        bmAttributes         0x80
          (Bus Powered)
        MaxPower               98mA
        Interface Association:
          bLength                 8
          bDescriptorType        11
          bFirstInterface         0
          bInterfaceCount         2
          bFunctionClass         14 Video
          bFunctionSubClass       3 Video Interface Collection
          bFunctionProtocol       0 
          iFunction               5 HP Webcam-50
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        0
          bAlternateSetting       0
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      1 Video Control
          bInterfaceProtocol      0 
          iInterface              5 HP Webcam-50
          VideoControl Interface Descriptor:
            bLength                13
            bDescriptorType        36
            bDescriptorSubtype      1 (HEADER)
            bcdUVC               1.00
            wTotalLength          103
            dwClockFrequency       15.000000MHz
            bInCollection           1
            baInterfaceNr( 0)       1
          VideoControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             2
            wTerminalType      0x0101 USB Streaming
            bAssocTerminal          0
            bSourceID               5
            iTerminal               0 
          VideoControl Interface Descriptor:
            bLength                26
            bDescriptorType        36
            bDescriptorSubtype      6 (EXTENSION_UNIT)
            bUnitID                 4
            guidExtensionCode         {7033f028-1163-2e4a-ba2c-6890eb334016}
            bNumControl             8
            bNrPins                 1
            baSourceID( 0)          3
            bControlSize            1
            bmControls( 0)       0x0f
            iExtension              0 
          VideoControl Interface Descriptor:
            bLength                26
            bDescriptorType        36
            bDescriptorSubtype      6 (EXTENSION_UNIT)
            bUnitID                 5
            guidExtensionCode         {3fae1228-d7bc-114e-a357-6f1edef7d61d}
            bNumControl             8
            bNrPins                 1
            baSourceID( 0)          4
            bControlSize            1
            bmControls( 0)       0x01
            iExtension              0 
          VideoControl Interface Descriptor:
            bLength                18
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             1
            wTerminalType      0x0201 Camera Sensor
            bAssocTerminal          0
            iTerminal               0 
            wObjectiveFocalLengthMin      0
            wObjectiveFocalLengthMax      0
            wOcularFocalLength            0
            bControlSize                  3
            bmControls           0x00000000
          VideoControl Interface Descriptor:
            bLength                11
            bDescriptorType        36
            bDescriptorSubtype      5 (PROCESSING_UNIT)
          Warning: Descriptor too short
            bUnitID                 3
            bSourceID               1
            wMaxMultiplier          0
            bControlSize            2
            bmControls     0x0000053f
              Brightness
              Contrast
              Hue
              Saturation
              Sharpness
              Gamma
              Backlight Compensation
              Power Line Frequency
            iProcessing             0 
            bmVideoStandards     0x 0
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x83  EP 3 IN
            bmAttributes            3
              Transfer Type            Interrupt
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0010  1x 16 bytes
            bInterval               6
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       0
          bNumEndpoints           0
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          VideoStreaming Interface Descriptor:
            bLength                            14
            bDescriptorType                    36
            bDescriptorSubtype                  1 (INPUT_HEADER)
            bNumFormats                         1
            wTotalLength                      263
            bEndPointAddress                  129
            bmInfo                              0
            bTerminalLink                       2
            bStillCaptureMethod                 2
            bTriggerSupport                     0
            bTriggerUsage                       0
            bControlSize                        1
            bmaControls( 0)                    27
          VideoStreaming Interface Descriptor:
            bLength                            27
            bDescriptorType                    36
            bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
            bFormatIndex                        1
            bNumFrameDescriptors                5
            guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
            bBitsPerPixel                      16
            bDefaultFrameIndex                  1
            bAspectRatioX                       0
            bAspectRatioY                       0
            bmInterlaceFlags                 0x00
              Interlaced stream or variable: No
              Fields per frame: 2 fields
              Field 1 first: No
              Field pattern: Field 1 only
              bCopyProtect                      0
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         1
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            640
            wHeight                           480
            dwMinBitRate                  3686400
            dwMaxBitRate                 18432000
            dwMaxVideoFrameBufferSize      614400
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         2
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            352
            wHeight                           288
            dwMinBitRate                  1216512
            dwMaxBitRate                  6082560
            dwMaxVideoFrameBufferSize      202752
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         3
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            320
            wHeight                           240
            dwMinBitRate                   921600
            dwMaxBitRate                  4608000
            dwMaxVideoFrameBufferSize      153600
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         4
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            176
            wHeight                           144
            dwMinBitRate                   304128
            dwMaxBitRate                  1520640
            dwMaxVideoFrameBufferSize       50688
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         5
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            160
            wHeight                           120
            dwMinBitRate                   230400
            dwMaxBitRate                  1152000
            dwMaxVideoFrameBufferSize       38400
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            26
            bDescriptorType                    36
            bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
            bEndpointAddress                    0
            bNumImageSizePatterns               5
            wWidth( 0)                        640
            wHeight( 0)                       480
            wWidth( 1)                        352
            wHeight( 1)                       288
            wWidth( 2)                        320
            wHeight( 2)                       240
            wWidth( 3)                        176
            wHeight( 3)                       144
            wWidth( 4)                        160
            wHeight( 4)                       120
            bNumCompressionPatterns             5
          VideoStreaming Interface Descriptor:
            bLength                             6
            bDescriptorType                    36
            bDescriptorSubtype                 13 (COLORFORMAT)
            bColorPrimaries                     1 (BT.709,sRGB)
            bTransferCharacteristics            1 (BT.709)
            bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       1
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0080  1x 128 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       2
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0100  1x 256 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       3
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0320  1x 800 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       4
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0b20  2x 800 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       5
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x1320  3x 800 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       6
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x1400  3x 1024 bytes
            bInterval               1
    Device Qualifier (for other device speed):
      bLength                10
      bDescriptorType         6
      bcdUSB               2.00
      bDeviceClass          239 Miscellaneous Device
      bDeviceSubClass         2 ?
      bDeviceProtocol         1 Interface Association
      bMaxPacketSize0        64
      bNumConfigurations      1
    Device Status:     0x0002
      (Bus Powered)
      Remote Wakeup Enabled
    And without:
    Code:
    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            3.02
      iManufacturer           3 Linux 3.2.0-40-generic ehci_hcd
      iProduct                2 EHCI Host Controller
      iSerial                 1 0000:00:1d.7
      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              11
      bDescriptorType      41
      nNbrPorts             8
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood       10 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00 0x00
      PortPwrCtrlMask    0xff 0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
       Port 3: 0000.0100 power
       Port 4: 0000.0507 highspeed power suspend enable connect
       Port 5: 0000.0501 highspeed power connect
       Port 6: 0000.0100 power
       Port 7: 0000.0100 power
       Port 8: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI 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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI Host Controller
      iSerial                 1 0000:00:1d.1
      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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI Host Controller
      iSerial                 1 0000:00:1d.2
      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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               1.10
      bDeviceClass            9 Hub
      bDeviceSubClass         0 Unused
      bDeviceProtocol         0 Full speed (or root) hub
      bMaxPacketSize0        64
      idVendor           0x1d6b Linux Foundation
      idProduct          0x0001 1.1 root hub
      bcdDevice            3.02
      iManufacturer           3 Linux 3.2.0-40-generic uhci_hcd
      iProduct                2 UHCI Host Controller
      iSerial                 1 0000:00:1d.3
      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     0x0002  1x 2 bytes
            bInterval             255
    Hub Descriptor:
      bLength               9
      bDescriptorType      41
      nNbrPorts             2
      wHubCharacteristic 0x000a
        No power switching (usb 1.0)
        Per-port overcurrent protection
      bPwrOn2PwrGood        1 * 2 milli seconds
      bHubContrCurrent      0 milli Ampere
      DeviceRemovable    0x00
      PortPwrCtrlMask    0xff
     Hub Port Status:
       Port 1: 0000.0100 power
       Port 2: 0000.0100 power
    Device Status:     0x0001
      Self Powered
    
    
    Bus 001 Device 002: ID 0408:0ff1 Quanta Computer, Inc. 
    Device Descriptor:
      bLength                18
      bDescriptorType         1
      bcdUSB               2.00
      bDeviceClass          239 Miscellaneous Device
      bDeviceSubClass         2 ?
      bDeviceProtocol         1 Interface Association
      bMaxPacketSize0        64
      idVendor           0x0408 Quanta Computer, Inc.
      idProduct          0x0ff1 
      bcdDevice            1.04
      iManufacturer           2 QCM
      iProduct                1 HP Webcam-50
      iSerial                 3 SN001
      bNumConfigurations      1
      Configuration Descriptor:
        bLength                 9
        bDescriptorType         2
        wTotalLength          509
        bNumInterfaces          2
        bConfigurationValue     1
        iConfiguration          0 
        bmAttributes         0x80
          (Bus Powered)
        MaxPower               98mA
        Interface Association:
          bLength                 8
          bDescriptorType        11
          bFirstInterface         0
          bInterfaceCount         2
          bFunctionClass         14 Video
          bFunctionSubClass       3 Video Interface Collection
          bFunctionProtocol       0 
          iFunction               5 HP Webcam-50
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        0
          bAlternateSetting       0
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      1 Video Control
          bInterfaceProtocol      0 
          iInterface              5 HP Webcam-50
          VideoControl Interface Descriptor:
            bLength                13
            bDescriptorType        36
            bDescriptorSubtype      1 (HEADER)
            bcdUVC               1.00
            wTotalLength          103
            dwClockFrequency       15.000000MHz
            bInCollection           1
            baInterfaceNr( 0)       1
          VideoControl Interface Descriptor:
            bLength                 9
            bDescriptorType        36
            bDescriptorSubtype      3 (OUTPUT_TERMINAL)
            bTerminalID             2
            wTerminalType      0x0101 USB Streaming
            bAssocTerminal          0
            bSourceID               5
            iTerminal               0 
          VideoControl Interface Descriptor:
            bLength                26
            bDescriptorType        36
            bDescriptorSubtype      6 (EXTENSION_UNIT)
            bUnitID                 4
            guidExtensionCode         {7033f028-1163-2e4a-ba2c-6890eb334016}
            bNumControl             8
            bNrPins                 1
            baSourceID( 0)          3
            bControlSize            1
            bmControls( 0)       0x0f
            iExtension              0 
          VideoControl Interface Descriptor:
            bLength                26
            bDescriptorType        36
            bDescriptorSubtype      6 (EXTENSION_UNIT)
            bUnitID                 5
            guidExtensionCode         {3fae1228-d7bc-114e-a357-6f1edef7d61d}
            bNumControl             8
            bNrPins                 1
            baSourceID( 0)          4
            bControlSize            1
            bmControls( 0)       0x01
            iExtension              0 
          VideoControl Interface Descriptor:
            bLength                18
            bDescriptorType        36
            bDescriptorSubtype      2 (INPUT_TERMINAL)
            bTerminalID             1
            wTerminalType      0x0201 Camera Sensor
            bAssocTerminal          0
            iTerminal               0 
            wObjectiveFocalLengthMin      0
            wObjectiveFocalLengthMax      0
            wOcularFocalLength            0
            bControlSize                  3
            bmControls           0x00000000
          VideoControl Interface Descriptor:
            bLength                11
            bDescriptorType        36
            bDescriptorSubtype      5 (PROCESSING_UNIT)
          Warning: Descriptor too short
            bUnitID                 3
            bSourceID               1
            wMaxMultiplier          0
            bControlSize            2
            bmControls     0x0000053f
              Brightness
              Contrast
              Hue
              Saturation
              Sharpness
              Gamma
              Backlight Compensation
              Power Line Frequency
            iProcessing             0 
            bmVideoStandards     0x 0
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x83  EP 3 IN
            bmAttributes            3
              Transfer Type            Interrupt
              Synch Type               None
              Usage Type               Data
            wMaxPacketSize     0x0010  1x 16 bytes
            bInterval               6
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       0
          bNumEndpoints           0
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          VideoStreaming Interface Descriptor:
            bLength                            14
            bDescriptorType                    36
            bDescriptorSubtype                  1 (INPUT_HEADER)
            bNumFormats                         1
            wTotalLength                      263
            bEndPointAddress                  129
            bmInfo                              0
            bTerminalLink                       2
            bStillCaptureMethod                 2
            bTriggerSupport                     0
            bTriggerUsage                       0
            bControlSize                        1
            bmaControls( 0)                    27
          VideoStreaming Interface Descriptor:
            bLength                            27
            bDescriptorType                    36
            bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
            bFormatIndex                        1
            bNumFrameDescriptors                5
            guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
            bBitsPerPixel                      16
            bDefaultFrameIndex                  1
            bAspectRatioX                       0
            bAspectRatioY                       0
            bmInterlaceFlags                 0x00
              Interlaced stream or variable: No
              Fields per frame: 2 fields
              Field 1 first: No
              Field pattern: Field 1 only
              bCopyProtect                      0
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         1
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            640
            wHeight                           480
            dwMinBitRate                  3686400
            dwMaxBitRate                 18432000
            dwMaxVideoFrameBufferSize      614400
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         2
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            352
            wHeight                           288
            dwMinBitRate                  1216512
            dwMaxBitRate                  6082560
            dwMaxVideoFrameBufferSize      202752
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         3
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            320
            wHeight                           240
            dwMinBitRate                   921600
            dwMaxBitRate                  4608000
            dwMaxVideoFrameBufferSize      153600
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         4
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            176
            wHeight                           144
            dwMinBitRate                   304128
            dwMaxBitRate                  1520640
            dwMaxVideoFrameBufferSize       50688
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            38
            bDescriptorType                    36
            bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
            bFrameIndex                         5
            bmCapabilities                   0x00
              Still image unsupported
            wWidth                            160
            wHeight                           120
            dwMinBitRate                   230400
            dwMaxBitRate                  1152000
            dwMaxVideoFrameBufferSize       38400
            dwDefaultFrameInterval         416666
            bFrameIntervalType                  3
            dwFrameInterval( 0)            416666
            dwFrameInterval( 1)            833333
            dwFrameInterval( 2)           1666666
          VideoStreaming Interface Descriptor:
            bLength                            26
            bDescriptorType                    36
            bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
            bEndpointAddress                    0
            bNumImageSizePatterns               5
            wWidth( 0)                        640
            wHeight( 0)                       480
            wWidth( 1)                        352
            wHeight( 1)                       288
            wWidth( 2)                        320
            wHeight( 2)                       240
            wWidth( 3)                        176
            wHeight( 3)                       144
            wWidth( 4)                        160
            wHeight( 4)                       120
            bNumCompressionPatterns             5
          VideoStreaming Interface Descriptor:
            bLength                             6
            bDescriptorType                    36
            bDescriptorSubtype                 13 (COLORFORMAT)
            bColorPrimaries                     1 (BT.709,sRGB)
            bTransferCharacteristics            1 (BT.709)
            bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       1
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0080  1x 128 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       2
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0100  1x 256 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       3
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0320  1x 800 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       4
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x0b20  2x 800 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       5
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x1320  3x 800 bytes
            bInterval               1
        Interface Descriptor:
          bLength                 9
          bDescriptorType         4
          bInterfaceNumber        1
          bAlternateSetting       6
          bNumEndpoints           1
          bInterfaceClass        14 Video
          bInterfaceSubClass      2 Video Streaming
          bInterfaceProtocol      0 
          iInterface              0 
          Endpoint Descriptor:
            bLength                 7
            bDescriptorType         5
            bEndpointAddress     0x81  EP 1 IN
            bmAttributes            5
              Transfer Type            Isochronous
              Synch Type               Asynchronous
              Usage Type               Data
            wMaxPacketSize     0x1400  3x 1024 bytes
            bInterval               1
    Device Qualifier (for other device speed):
      bLength                10
      bDescriptorType         6
      bcdUSB               2.00
      bDeviceClass          239 Miscellaneous Device
      bDeviceSubClass         2 ?
      bDeviceProtocol         1 Interface Association
      bMaxPacketSize0        64
      bNumConfigurations      1
    Device Status:     0x0002
      (Bus Powered)
      Remote Wakeup Enabled
    I would like to get to the bottom of this, please help!

  2. #2
    Join Date
    Jul 2005
    Beans
    2,050

    Re: SD cards don't work until reboot

    ~
    Last edited by ahallubuntu; June 24th, 2013 at 01:45 AM.

  3. #3
    Join Date
    Nov 2012
    Beans
    12

    Re: SD cards don't work until reboot

    In Ubuntu proper, you need to use "Eject" not "Safely Remove Drive" when un-mounting an internal card reader SD card. Otherwise, the internal SD reader can't be used until reboot. I'm not sure how/what it's called in Lubuntu/Zorin, but I'd look at doing it the same way there.
    Interesting. What I did was unmount the two partitions on the drive and then use the Safe Removal button for the entire drive. Odd how it doesn't check if the drive is internal or something.

  4. #4
    Join Date
    Jan 2008
    Location
    Nappanee, IN
    Beans
    602
    Distro
    Xubuntu 12.04 Precise Pangolin

    Re: SD cards don't work until reboot

    If you don't use the Eject option, Ubuntu assumes you will be re-inserting the same SD card again, or that there was simply an interruption in the reader connection. I have the same reaction on both internal SD card reader and external USB SD card reader.
    As for why an internal SD reader works sometimes, but the external reader does not? Unknown. I have both and they work independently.

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