Folks,
I have the same issue with a Nikon D40 camera loaded with a 4GB SDHC card on 
ubuntu 8.04 (i386) and 8.10(amd 64bit). The mount works fine with Ubuntu 7.04 
as well as Knoppix 5.1.1 (all i386-versions). The mount also works with a 2GB 
SD card on 8.04,

I thought it might be an adress pointer problem on the 32-bit i386
version and booted the 64-bit version of Ubuntu 8.10. I had the same
issues.

Any hints or workarounds?

Here is my output from /var/log/messages:

Oct 14 22:59:50 calzone kernel: [ 1054.174655] scsi8 : SCSI emulation for USB 
Mass Storage devices
Oct 14 22:59:55 calzone kernel: [ 1059.175927] scsi 8:0:0:0: Direct-Access     
NIKON    D40              1.00 PQ: 0 ANSI: 2
Oct 14 22:59:55 calzone kernel: [ 1059.177402] sd 8:0:0:0: [sdc] 7959553 
512-byte hardware sectors (4075 MB)
Oct 14 22:59:55 calzone kernel: [ 1059.177898] sd 8:0:0:0: [sdc] Write Protect 
is off
Oct 14 22:59:55 calzone kernel: [ 1059.179895] sd 8:0:0:0: [sdc] 7959553 
512-byte hardware sectors (4075 MB)
Oct 14 22:59:55 calzone kernel: [ 1059.180394] sd 8:0:0:0: [sdc] Write Protect 
is off
Oct 14 22:59:55 calzone kernel: [ 1059.180404]  sdc: sdc1
Oct 14 22:59:55 calzone kernel: [ 1059.182795] sd 8:0:0:0: [sdc] Attached SCSI 
removable disk
Oct 14 22:59:55 calzone kernel: [ 1059.182925] sd 8:0:0:0: Attached scsi 
generic sg3 type 0
Oct 14 22:59:55 calzone kernel: [ 1059.257525] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.258644] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.262635] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.263770] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.264884] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.274866] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.275993] end_request: I/O error, dev sdc, 
sector 7959552
Oct 14 22:59:55 calzone kernel: [ 1059.277238] end_request: I/O error, dev sdc, 
sector 96
Oct 14 22:59:55 calzone kernel: [ 1059.278373] end_request: I/O error, dev sdc, 
sector 97
Oct 14 22:59:55 calzone kernel: [ 1059.279614] end_request: I/O error, dev sdc, 
sector 96
Oct 14 22:59:55 calzone kernel: [ 1059.280744] end_request: I/O error, dev sdc, 
sector 97
Oct 14 22:59:55 calzone kernel: [ 1059.299715] end_request: I/O error, dev sdc, 
sector 8192
Oct 14 22:59:55 calzone kernel: [ 1059.300825] end_request: I/O error, dev sdc, 
sector 8192
Oct 14 22:59:55 calzone kernel: [ 1059.301954] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:55 calzone kernel: [ 1059.303081] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:55 calzone kernel: [ 1059.304198] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:55 calzone kernel: [ 1059.305318] end_request: I/O error, dev sdc, 
sector 1
Oct 14 22:59:55 calzone kernel: [ 1059.312441] end_request: I/O error, dev sdc, 
sector 8192
Oct 14 22:59:55 calzone kernel: [ 1059.313561] end_request: I/O error, dev sdc, 
sector 8192
Oct 14 22:59:55 calzone kernel: [ 1059.315180] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:55 calzone kernel: [ 1059.316304] end_request: I/O error, dev sdc, 
sector 1
Oct 14 22:59:55 calzone kernel: [ 1059.317549] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:55 calzone kernel: [ 1059.319683] end_request: I/O error, dev sdc, 
sector 1
Oct 14 22:59:55 calzone kernel: [ 1059.321042] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:55 calzone kernel: [ 1059.322173] end_request: I/O error, dev sdc, 
sector 1
Oct 14 22:59:58 calzone kernel: [ 1061.737350] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:58 calzone kernel: [ 1061.738476] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:58 calzone kernel: [ 1061.739720] end_request: I/O error, dev sdc, 
sector 0
Oct 14 22:59:58 calzone kernel: [ 1061.740846] end_request: I/O error, dev sdc, 
sector 1
Oct 14 23:02:27 calzone kernel: [ 1211.192988] usb 8-5: USB disconnect, address 
5

# lsusb -v  -D /proc/bus/usb/008/001 
Device: ID 0000:0000  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         1 Single TT
  bMaxPacketSize0        64
  idVendor           0x0000 
  idProduct          0x0000 
  bcdDevice            2.06
  iManufacturer           3 Linux 2.6.24-19-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
    TT think time 8 FS bits
  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: 0000.0100 power
   Port 5: 0000.0503 highspeed power enable connect
   Port 6: 0000.0100 power
   Port 7: 0000.0100 power
   Port 8: 0000.0100 power
Device Status:     0x0003
  Self Powered
  Remote Wakeup Enabled

#  lsusb -v  -D /proc/bus/usb/008/006 
Device: ID 04b0:0413 Nikon Corp. D40 (mass storage mode)
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x04b0 Nikon Corp.
  idProduct          0x0413 D40 (mass storage mode)
  bcdDevice            1.00
  iManufacturer           1 NIKON
  iProduct                2 NIKON DSC D40
  iSerial                 3 6073492
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk (Zip)
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0001
  Self Powered

-- 
I can't mount my stick datatraveler reader 2gb of kingston
https://bugs.launchpad.net/bugs/177024
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