Hello, thank you for helping me : Here's my problem :
I run Ubuntu 8.04 on my computer and each time i want to offload the photos from my Camera to the computer (plugging it on a USB port) comes out a message saying something like "Error during the plugging of the Camera" & "Error <<Undefined error>> received during the camera plugging". (this message comes out of the software 'F-Spot')
When i try using GTkam to offload my photos the following message comes out : (approximate translation)
"Impossible to list the directories of '/' " & "An error occurred in the Input/Output library ('Impossible to find the required camera on the USB port') : Impossible to find the USB peripheric (maker 0x6, under-class 0x1, product 0x1). Make sure it is plugged to the computer.
When i try using DigiKam and after having chosen the model Kodak M753 (mine is a M853, only the number of pixels differs i think) then the following message comes out :
"Failed to connect to the camera. please make sure it is connected properly and turned on."
With Digikam, when i 'Select image to upload' and click on 'storage media' and then select 'USB imaging interface' the following message comes out : "couldnt start process Unable to create io-slave: klauncher said: Unknown protocol 'camera' "
I am surprised too to find out that the path spontaneously specified towards the camera (before having selected any model) is '/'. I would have thought it should be something beginning by '/usb (...)'.

After having chatted through an irc channel with a helper, he told me that the bottom of my problem was that the device isn't recognized by the kernel as a mass-storage device. (He examined 'dmseg' output and other things too). He told me he wasn't able to solve porperly my problem.
May someone help me please ? Thank you.
NB the lsusb output only gives$ lsusb
Bus 001 Device 001: ID 0000:0000
which is strange because i have two front usb ports and 4 on the rear side....