GIMP: Could not mount Canon Digital Camera

Status changed to 'Confirmed' because the bug affects multiple users.

I have this problem too, but the problem isn't really in gimp, it's in gphoto2 (or possibly deeper, in the USB stack). This will get you some diagnostics:

gphoto2 --debug --debug-logfile=gphoto.log -L

You may need to install gphoto2 first:

sudo apt-get install gphoto2

gphoto doesn't have a bug tracker, because the 1980s called and wants its [bugs] mailing list back:
http://gphoto.10949.n7.nabble.com/gphoto-bugs-gphoto-Bugs-3523295-PTP-I-O-error-with-Canon-on-2nd-command-tt11114.html

Here are two relevant upstream libgphoto bugs:

http://sourceforge.net/p/gphoto/bugs/856/
http://sourceforge.net/p/gphoto/bugs/913/

For the record, I get the same symptoms as reported upstream - gphoto2 fails with:

1.801756 ptp2/usbread(2): Clearing halt on IN EP and retrying once.
1.802082 gphoto2-port(2): Clear halt...
1.802348 ptp2/usb_getresp(0): request code 0x1002 getting resp error 0x02ff
1.802558 ptp2/camera_init(0): ptp_opensession returns 2ff
1.802809 ptp2/device_reset_request(2): sending reset
1.803009 gphoto2-port(2): Writing message (request=0x66 value=0x0 index=0x0 size=0=0x0)...
1.803218 gphoto2-port(3): No hexdump (NULL buffer)
1.807272 ptp(2): PTP: Opening session
1.807557 gphoto2-port(2): Writing 16=0x10 bytes to port...
1.807761 gphoto2-port(3): Hexdump of 16 = 0x10 bytes follows:
0000 10 00 00 00 01 00 02 10-00 00 00 00 01 00 00 00 ................

1.808007 ptp2/ptp_usb_getresp(2): reading response
1.808210 ptp2/ptp_usb_getpacket(2): getting next ptp packet
1.808411 gphoto2-port(2): Reading 512=0x200 bytes from port...

I have a Canon 60D, Ubuntu 12.04 on a ZAReason, USB 2, and dpkg:

ii libusb-0.1-4 2:0.1.12-20 userspace USB programming library
ii libusb-0.1-4:i386 2:0.1.12-20 userspace USB programming library
ii libusb-1.0-0 2:1.0.9~rc3-2ubuntu1 userspace USB programming library
ii gphoto2 2.4.11-2 The gphoto2 digital camera command-line client
ii libgphoto2-2 2.4.13-1ubuntu1.2 gphoto2 digital camera library
ii libgphoto2-2:i386 2.4.13-1ubuntu1.2 gphoto2 digital camera library
ii libgphoto2-l10n 2.4.13-1ubuntu1.2 gphoto2 digital camera library - localized messages
ii libgphoto2-port0 2.4.13-1ubuntu1.2 gphoto2 digital camera port library
ii libgphoto2-port0:i386 2.4.13-1ubuntu1.2 gphoto2 digital camera port library

Same problem with a Canon 40D on Ubuntu 12.04, 12.10, and the latest 13.04 build. Worked fine under 32-bit Ubuntu. Seems to be an amd64 problem. gphoto logfile is attached.

(Need to clarify my previous comment - seems to be a problem in gphoto that only shows itself in 64-bit builds.)

Check if camera is attached to USB 3 port. ... if yes, switch it to a USB 2 port for now and try again.

The logfile shows that the camera does not respond to any commands.

Same problem with a USB 2 port (this is on a Sony VAIO laptop that has two USB3 and one USB2 ports).

Here is the log, taken from Ubuntu 13.04 using USB2.

Btw, I've opened a ticket for this on SF as well: https://sourceforge.net/p/gphoto/bugs/944/

I am getting the same problem with my Canon EOS 1100D and Toshiba Z930 that also has mixed USB 2.0 and 3.0 ports (and AMD64).

also check for the gvfs gphoto2 slave, it occasionaly conflicts with other libgphoto2 based accesses

I was finally able to access my camera (Canon EOS 40D) with my Ubuntu 12.10 x86_64 by killing the process /usr/lib/gvfs/gvfs-gphoto2-volume-monitor before starting Shotwell. The import works fine then. Previously I was getting the same error message as in the bug description.

Update: after killing gvfs-photo2-volume-monitor and setting IsNative=true in /usr/share/gvfs/remote-volume-monitors/gphoto2.monitor I can download the preview images but importing still fails with the error. My previous comment was a bit too overhasty.

Does not work with Nikon Coolpix P5000 either.

Same error with Canon 7D on Ubuntu 13.04 x64. Using a different USB port worked.

Same issue with Canon 40D on Ubuntu 13.04 x64, on both USB 2 and 3 of Acer Aspire V5-571.

Killing the process /usr/lib/gvfs/gvfs-gphoto2-volume-monitor removes the camera from the Nautilus sidebar, but makes no difference in Shotwell or any other programs.

Attached is the debug log from gphoto2.

A new clue:

I noticed that if I run "gphoto2 --summary" immediately after inserting the USB, it works as expected! But if I then run it a second time right after that, I get the same old error message.

In fact, I was also able to run "gphoto2 --get-all-photos" to download all the photos from the camera using the same method.

So it definitely seems that some other software is hijacking the camera when it is plugged in, and the only way to get access to the camera is to beat it to the punch. It only works once, though, and then you have to unplug+replug, or turn it off an on again to do it again.

Instead of killing gvfs-gphoto2-volume-monitor (which keeps coming back), I removed its executable flag - that fixed the problem for good. Now I can reliably download images via Shotwell.

Has this been fixed in gphoto >=2.5.2 as of the last post here?

  http://sourceforge.net/p/gphoto/bugs/913/?page=1

I also see the problem with a Canon D650 on a Lenovo G480 with Ubuntu 12.04.

James, I believe that's a different issue. I'm using Ubuntu 14.04 with gphoto2 2.5.3, and I still have this problem.

Ubuntu 12.10 reached end-of-life on April 2014.
Ubuntu 14.04 reached end of standard support on April 2019 and ESM does not cover this package.

Please reproduce this bug on a Ubuntu release under standard support.