On Fri, 16 Sep 2005, Leslie Katz wrote:
> 2. additional dmesg output found after DSC plugged in:
>
> usb 3-2: new full speed USB device using uhci_hcd and address 2
>
> 3. after running gphoto2 --auto-detect and then gphoto2 --abilities and
> getting appropriate output each time, found no additional dmesg output
>
> 4. after running gphoto2 -P and getting following usual error message,
>
> *** Error ***
> An error occurred in the io-library ('Error updating the port
> settings'): Could not release interface 0 (Invalid argument).
> *** Error (-37: 'Error updating the port settings') ***
>
>
> found additional dmesg output as follows:
>
> usb 3-2: usbdev_ioctl: GETDRIVER
> usb 3-2: usbdev_ioctl: CLAIMINTERFACE
> usb 3-2: usbdev_ioctl: RELEASEINTERFACE
> usb 3-2: usbdev_ioctl: SETCONFIGURATION
> usb 3-2: usbdev_ioctl: RELEASEINTERFACE
> usb 3-2: usbdev_ioctl: RELEASEINTERFACE
>
> I can only apologise for not following your instructions properly
> before.
>
> I hope the above information discloses what's been going wrong.
I looked at the source code. As far as I can see, that particular
combination of error messages can't be generated. The "Could not release
interface" message always goes along with "I/O problem", never with
"Error updating the port settings". Conversely, "Error updating the port
settings" always goes along with either "Could not set config" or "Could
not set altsetting".
You mentioned before that you upgraded to gphoto2 2.1.6. Did you upgrade
to libgphoto2 2.1.6 at the same time? If you didn't, that's your problem.
Alan Stern
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