On Sat, May 10, 2003 at 01:39:49AM -0700, Michael Rudmin wrote:
> Hi, I have a problem which seems like it should have
> come up before, but maybe it's new, because it's got a
> little twist.
>
> I installed hotplug usb, and have a Argus DC1500
> [essentially a pencam: it requires USB data transfer,
> and is not just a USB block device]. When I plug in
> my camera, I see in /proc/bus/usb/001 two files, one
> of which is the driver "001" and one of which is the
> camera, with a different number like "005".
Wild guess:
Check if hotplug loads camera q specific kernel module:
/sbin/lsmod |head
# plugin camera
/sbin/lsmod |head
I could not use the usb with DC2400 until I disabled
autoloading of dc2xx for a Kodak DC240.
>
> Now, I also installed /etc/hotplug/usb/usbcam and all
> that, so that it should adjust the permissions.
>
> I used the usbcam.group as my source for usbcam, and
> adjusted it to be executable. Then from the command
> line, I addgroup'd camera, and added my user name to
> the group camera with #adduser myuser camera.
>
> Note that usbcam.group refers to the group "camera".
> And now my executable usbcam does, as well.
>
> I also checked that the Argus' control variables, as
> referenced in /proc/bus/usb/devices, is covered by the
> graphics engine that runs all the permissions stuff.
>
> Finally, on KDE I set up (control
> panels)::(peripherals)::(camera) to include my Argus
> DC1500.
>
> When I type in camera:/ in the file manager URL, I get
> my DC1500. But when I click on it, I get one of two
> messages: "Cannot claim USB Bus", or sometimes "I/O
> problem. Cannot read file" or sometimes "Could not
> read file: bad parameters".
>
> Just to see if it was a permissions problem, I rather
> foolishly logged into KDE as root [I know, not a good
> idea, can wreck things], and tried to access the
> camera from there. No good -- it says "Cannot claim
> USB Bus". Maybe with time, it would give me the other
> errors instead.
Try the gphoto2 command line tool. This will test you
if it's a libgphoto/kernel problem or if it KDEs camera
io slave.
If gphoto2 works and camera:/ not you may try digikam.
Achim
>
> Does anyone know what is going on, and what I have to
> do differently? I've tried to follow the installation
> instructions everywhere, but I seem to be doing
> something wrong.
