The camera is a Sony DSC-W1 with a 256MB Memory Stick. The USB port has 
three settings: Pictbridge, PTF, and Normal. The default setting is 
normal and, in fact, when connected to the computer, the camera's LCD 
viewfinder shows "USB mode normal".

The computer has an add-on USB 2 card connected to a 4-port USB 2 hub. A 
  128MB flash, a SD card reader w/ a 256MBs SD card, and the camera are 
plugged into the hub.

I just read ALL the sections in camera's manual about the USB port 
(RTFM) and now have some things to check, which I'll do tonight--right 
now friend wife has a LIST.

More later.

-mj-

Alan Dayley wrote:
> On Saturday 30 October 2004 12:04 am, Mark Jarvis wrote:
> 
>>I have a digital camera with a USB connection. In XP, I access the
>>picture files in it exactly the same as I do files on my USB flash
>>drives. In Linux I can access the USB drives just fine, but when I try
>>to mount the camera, I get "device sdd1 is not a valid block device".
>>
>>In WBEL (White Box Enterprise Linux) the applicable fstab entries are:
>>
>>/dev/sdb1   /mnt/usbhd 		auto	noauto,rw,umask=0,users   0 0
>>/dev/sdc1   /mnt/usb_sd		auto	noauto,rw,umask=0,users   0 0
>>/dev/sdd1   /mnt/usb_camera	auto	noauto,rw,umask=0,users   0 0
>>
>>They start with sdb1 because sda1 is a SCSI disk.
>>
>>I also booted into Mepis & Knoppix with similar results--both saw the
>>two flash drives but not the camera. A student at school had a similar
>>problem with his Memorex flash drive. No linux system would recognize
>>it--he always gets the same "not a valid block device" message, even
>>from systems that recognize other flash drives.
>>
>>Someone suggested re-formatting--whether from some knowledge or from
>>"what the h___, let's try SOMETHING", I don't know.
>>
>>Does anybody have any ideas a) why Linux doesn't see some USB devices
>>properly and b) what the heck to do about it? Is there some reason to
>>expect re-formatting to help?
> 
> 
> Mark,
> 
> You need to tell more about your camera.  Some digital cameras cannot be 
> mounted as a USB drive.  The windows drivers hide this fact but in Linux, it 
> "knows."  For example, we have a Canon A80.  Most Canon cameras use a 
> connection method called Picture Transport Protocol (PTP).  The camera does 
> not present itself as a storage device but it works fine under Linux with 
> gphoto.
> 
> gphoto is a camera connection program that other GUI applications use to 
> manage digital cameras.  gtkam is the first application I used to organize 
> photos.  It uses gphoto under the GUI to talk to the camera.
> 
> In gtkam, out Canon camera works fine configured as "USB PTP Class Camera"  
> I'd suggest you try to use an application that uses gphoto.  gtkam may be the 
> first, best choice.  On the Fedora Core menus it is under the "Graphics" menu 
> as "Digital Camera Tool"
> 
> If that doesn't work, tell us more about your setup so we can help you 
> research and solve.
> 
> Alan
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