I am still having this issue, even after upgrading all packages in the
current 8.04 dev distribution. Running x86_64.
When using sudo it does work, when just using it as user, it doesn't.
$ gphoto2 --auto-detect
Model Port
----------------------------------------------------------
Canon PowerShot A95 (PTP mode) usb:
$ gphoto2 --get-all-files
*** Error ***
An error occurred in the io-library ('Could not claim the USB device'): Could
not claim interface 0 (Operation not permitted). Make sure no other program or
kernel module (such as sdc2xx, stv680, spca50x) is using the device and you
have read/write access to the device.
*** Error (-53: 'Could not claim the USB device') ***
See attachment for output of it running while --debug is enabled.
Main errors are:
*** Error ***
PTP: Sequence number mismatch 0 vs expected 1.
0.524642 context(0): PTP Error: bad parameter
** Attachment added: "--debug output"
http://launchpadlibrarian.net/12808232/gphoto2--get-all-files--debug.txt
--
Normal user can't access USB camera Error (-53: 'Could not claim the USB
device')
https://bugs.launchpad.net/bugs/189506
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