On Fri, May 10, 2002, Thierry Brichler <[EMAIL PROTECTED]> wrote:
> I have a concern involving an usb device (digital camera) and an
> application
> (gphoto2).
> The problem is that this application does not find the usb camera,
> although this seems (I say seems) regularly inserted in the
> /proc/bus/usb filesystem.
>
> At the moment, I do not know if this is due :
> - to the application itself
> - or to a bad configuration of the usb stuff
Well, it's likely to be a problem in gphoto2 or libusb.
> The file /proc/bus/usb/001/0xy file is created, with the correct
> authorizations :
>
> $ ls -l /proc/bus/usb/001
> total 1
> -rw-r--r-- 1 root root 18 mai 9 21:12 001
> -rw-r--r-- 1 root root 18 mai 9 21:12 003
> -rw------- 1 thierry root 18 mai 9 21:17 005
>
> At this time, 003 was devoted to the USB mouse, and 005 to the camera.
> A special script in the /etc/hotplug/usb/usbcam does a basic chown $USER
> and chmod 600 on the usb file, when camera is switched on.
>
> At this step, no camera driver is loaded. This belongs to the gphoto2
> application.
I assume you're running this application as user thierry?
> $ gphoto2 --camera "Canon PowerShot S200" -l
> *** Error ***
> An error occurred in the io-library ('Bad parameters'): Could not find
> USB device (vendor 0x4a9, product 0x3065). Make sure this device is
> connected to the computer.
> *** Error ('Bad parameters') ***
Could you set the environment variable USB_DEBUG to 9 at try running
that again?
> 3. Questions
> ---------
> - Is the usb camera correctly handled at kernel level ?
Looks like it.
> - Or : which additional tests should I perform to be convinced of this
> ?
Nope, it appears in lsusb, that means the kernel knows about it.
> - How to check the correct content of /proc/bus/usb/001/0xy ?
It's fine. As you can see from lsusb which uses it.
JE
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