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Bug #11804

Tether: Darktable loses connection to Canon EOS 80D

Added by Markus Dörschmidt 18 days ago. Updated 4 days ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
Tethering
Target version:
-
Start date:
11/02/2017
Due date:
% Done:

0%

Affected Version:
2.2.5
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

My EOS 80D is connected via USB. I can switch to Tether mode in Darktable, so the camera is detected.

When I press the shutter button to take a picture, Darktable shows "connection with camera lost, exiting tethering mode" and switches back to lighttable mode.

Running Darktable 2.2.5 on Ubuntu 17.10 (x86, 64bit), Gnome 3 Shell

History

#1 Updated by Tobias Ellinghaus 13 days ago

Please try running darktable with -d camctl. Does that tell why it fails?

#2 Updated by Markus Dörschmidt 6 days ago

Here is the output from Darktable, when connection is lost:

[camera_control] Camera configuration change event, lets update internal configuration cache.
[camera_control] executing set camera config job iso=1600
[camera_control] executing set camera config job aperture=5.6
[camera_control] executing set camera config job shutterspeed=1/60
[camera_control] gphoto2 error: PTP General Error
[camera_control] disabling tether mode
[camera_control] camera control un-locked for camera 0x7f1070009860
[camera_control] unregistering listener 0x35f8e90
[camera_control] unregistering listener 0x3d6dbc0
[camera_control] disabling tether mode
[camera_control] camera control un-locked for camera (nil)
[camera_control] unregistering listener 0x35f8e90
[camera_control] exiting camera thread.
[camera_control] loaded 36 port drivers.
[camera_control] 1 cameras connected

#3 Updated by Tobias Ellinghaus 4 days ago

"PTP General Error" sounds vague. No idea what's happening. Just to make sure that it's not a bad USB connection, please try wiggling the cable and see if it will drop the connection. Yes, I am grasping at straws here.

#4 Updated by Tobias Ellinghaus 4 days ago

After talking to a gphoto2 dev here's the next thing to test: Run the standalone gphoto2 tool.

gphoto2 --capture-tethered --debug --debug-logfile=xx.log

Then press the shutter button. I'd also like to know what version of (lib)gphoto2 you have installed.

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