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Hardware - USB camera problem

pampelmoose - 16.06.2006, 05:17 Uhr
Titel: USB camera problem

A problem with my digital camera [it's a Kodak EasyShare Z-730], and my computer [using Kanotix-64-2005-04-lite] : I can't mount the camera because it is not assigned a block device.

With other USB peripherals (memory stick, card reader), I get a message in dmesg such as

Code:

usb 5-8: new high speed USB device using ehci_hcd and address 5

Initializing USB Mass Storage driver...

scsi5 : SCSI emulation for USB Mass Storage devices

usbcore: registered new driver usb-storage

USB Mass Storage support registered.

usb-storage: device found at 5

usb-storage: waiting for device to settle before scanning

  Vendor: Kingston  Model: DataTraveler 2.0  Rev: 6.16

  Type:   Direct-Access                      ANSI SCSI revision: 00

SCSI device sdb: 498687 512-byte hdwr sectors (255 MB)

and the device is assigned a block device (such as sdb), and I can mount it.

With the camera, there is only one line of dmesg output

Code:

usb 4-2: new full speed USB device using uhci_hcd and address 4

and no block device gets assigned.

I am using the un-modified Kanotix-64-2005-04-lite kernel.

Is the problem that the kernel is using the uhci-hcd module instead of the ehci-hcd? Or that SCSI emulation is only compiled for the uhci-hcd?

The computer is recognizing the camera (as per the line in dmesg, and an entry in /proc/bus/usb/devices). As far as I can tell, I need SCSI emulation for this device, which came automatically with other USB devices.[/quote]

mzilikazi - 17.06.2006, 14:38 Uhr
Titel:

Keep in mind that not all cameras can simply be mounted. Perhaps try gphoto2 or digikam and see if either of those applications recognizes the camera.

kb0hae - 17.06.2006, 14:45 Uhr
Titel:

Hi. I cant help much, as I don't have a Kodak camera. (my old Fuji Finepix 2650 mounts fine, and acts just like a flash drive) I all else fails, you can always get a USB card reader for the camera's memory card.

Good luck!

pampelmoose - 17.06.2006, 14:59 Uhr
Titel:

Thanks to both of you.

I do have a card reader which works, so that mounting the camera is not crucial. (It's just a little quicker than removing the memory card.)

Digikam and gphoto2 do recognize the camera as a generic USB PTP class camera. But they have 2 problems, one a big one. The small one is that they can't access the camera unless I am root ; some sort of permissions problem. The big one is that when they access the camera, the directory of files is shown, but I can't do anything (view,open, delete, etc) to any of the files in the camera.

schnorrer - 17.06.2006, 19:03 Uhr
Titel:

Make sure that you User xxx is member of Group Camera/gphoto2.

make sure that the user can mount devices read write permissions are set at the normal place for drives.

mzilikazi - 17.06.2006, 19:49 Uhr
Titel:

pampelmoose hat folgendes geschrieben::

The small one is that they can't access the camera unless I am root ; some sort of permissions problem. The big one is that when they access the camera, the directory of files is shown, but I can't do anything (view,open, delete, etc) to any of the files in the camera.

Code:

$ su

# adduser <username> camera

# CTRL+D

$ newgrp - camera