When I try to take an automatic picture with my SLR camera (Canon Rebel XT) via the following command in gphoto2:

gphoto2 --trigger-capture

It returns an error as follow

*** Error ***              
Sorry, your camera does not support generic capture
ERROR: Could not trigger capture.
*** Error (-6: 'Unsupported operation') ***       

For debugging messages, please use the --debug option.
Debugging messages may help finding a solution to your problem.
If you intend to send any error or debug messages to the gphoto
developer mailing list <[email protected]>, please run
gphoto2 as follows:

    env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --trigger-capture

Please make sure there is sufficient quoting around the arguments.

To resolve that I tried to find (and kill) any other ongoing gphoto2 process, but I couldn't find any:

ps -A

I also checked if the camera is properly connected and recognized by Pi3 via:

pi@raspberrypi:~ $ gphoto2 --auto-detect 
Model                          Port                                            
Canon EOS 350D                 usb:001,016

Another fact that might be helpful to troubleshoot this is that when I connect my LSR to Pi3 it says "busy" on its screen.

Thanks you!

  • Can you try out your camera with a normal laptop running Linux? Can you collect a detailed log as the error message describes (with --debug etc.)? Commented Jan 29, 2018 at 15:00

1 Answer 1


The names and models of the cameras supported by gphoto is listed here: http://www.gphoto.org/proj/libgphoto2/support.php

Canon Rebel XT is not on the list and therefore I should probably use another camera to resolve this issue.

  • 1
    Please accept your own answer with a click on the tick on its left side. Only this will finish the question and it will not pop up again year for year.
    – Ingo
    Commented Jan 28, 2020 at 21:31

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.