You can safely ignore any OS popup message which may appear. If you have nothing but comments in this file, just add dslr-webcam as the last line in this file. This file contains the names of kernel modules that should be loaded at boot time, one per line. Lines beginning with " " are ignored. Still within your terminal, validate that gPhoto can see and interact with your camera: gphoto2 --auto-detect List auto-detected cameras and the ports to which they are connected. This all does not query the camera, it uses data provided by the library.
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Doing this only requires one press of the shutter release button when using Mirror Lockup. It is equivalent to the Drive Mode button on the camera when using Quick Control mode. Otherwise will go into RAM ether. The PTP status stream at the terminal seemed to indicate the camera needed more time to process the request. I hope this helps. Is there a sequence of gphoto2 commands that releases the camera or resets the interface?
I tried using gphoto2 —shell with mixed success. I seemed to observe similar behavior with other commands. It seems that the most reliable way to send a sequence of commands is via the command line at one time. Can you explain this? Thank you, Charles. I cannot seem to get --capture-image to work as expected in any of the manual modes M, Av, or Tv. It does work as expected in Movie mode.
Is this to be expected? In the manual modes it seems to start taking a picture mirror motion sound and then appears to time out. If I press the shutter release it then takes a picture and does not time out and I do not get the error message.
I am running gphoto2 ver 2. Gphoto2 news mentions some Canon fixes in version 2. Is that the fix? Is there an apt install for this version yet? I cannot seem to find it. The EOS support has greatly improved from 2. No idea about this specific problem, but it very likely behaves better. Even 2. No idea about Ubuntu packages. CIao, Marcus.
How to Use Your DSLR Camera as a Webcam in Linux
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gphoto2 (1) - Linux Man Pages