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I am trying to get my Canon Optura 20 to be recognized by gphoto2 on my
Slackware 10.2 box. When I plug it into a USB port, the kernel prints the
following in my messages file:

Feb 15 21:16:39 MyBox kernel: usb 3-2: new full speed USB device
using uhci_hcd and address 4

whereas in syslog I have

Feb 15 21:16:40 MyBox kernel: usb 3-2: khubd timed out on ep0in

After this, if I do cat /proc/bus/usb/devices, one of the entries printed
out is

T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs= 1
P: Vendor=04a9 ProdID=307f Rev= 0.01
S: Manufacturer=CANON Inc.
S: Product=Canon DVC
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=83(I) Atr=03(Int.) MxPS= 8 Ivl=96ms

I guess this means that the device has been recognized all right.
In addition, gphoto2 --list-ports returns

Devices found: 1
Path Description
--------------------------------------------------------------
usb: Universal Serial Bus

However, gphoto2 --auto-detect can't recognize the camera. What I am
missing? The syslog entry does not look good, but I have no clue of its
meaning. I am running a 2.6.11 kernel.

Suggestions, anyone?

to be able to use (lib)gphoto2 the following steps must be
accomplished :

+ ensure that the hotplug is able to recognize the supported cameras.
This step must be achieved with the following command :

$ /usr/lib/libgphoto2/print-usb-usermap >
/etc/hotplug/usb/usbcam.usermap

+ if necessary, create the group 'camera' with the command below. This
is needed to
be able to restrict the access to the cameras which will be
connected to the workstation :

$ groupadd -g 222 camera

+ add to the group 'camera' all the users who will be authorized to
access to
the cameras who will be used.

+ Copy the script usbcam.group (which is in
/usr/share/doc/libgphoto2/linux-hotplug/
directory) in /etc/hotplug/usb/usbcam and make this one executable
:

$ cp /usr/share/doc/libgphoto2/linux-hotplug/usbcam.group
/etc/hotplug/usb/usbcam
$ chmod +x /etc/hotplug/usb/usbcam

http://www.gphoto.org/doc/manual/permissions-usb.html

give this a carefull read