Does anyone use Tethering function on Olympus E-M1 II in darktable?

Software darktable
1

Hi All,
I use gphoto/libgphoto2 2.5.23 on ubuntu 19.10.

This version of gphoto2 is using the following software versions and options:
gphoto2 2.5.23 gcc, popt(m), exif, cdk, aa, jpeg, readline
libgphoto2 2.5.23 all camlibs, gcc, ltdl, EXIF
libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, USB, serial without locking

I can use $ gphot2 --config to setting camaera
%E8%9E%A2%E5%B9%95%E5%BF%AB%E7%85%A7_2020-01-24_15-19-35
%E8%9E%A2%E5%B9%95%E5%BF%AB%E7%85%A7_2020-01-24_16-18-55
%E8%9E%A2%E5%B9%95%E5%BF%AB%E7%85%A7_2020-01-24_16-19-07

When I use $ lsusb, it look like connect sucess.
![%E8%9E%A2%E5%B9%95%E5%BF%AB%E7%85%A7_2020-01-24_15-18-49s|690x238]
(upload://yGaTdAa5yvcldxo8pw9cTwq1RAC.png)

When I connect camaera in darktable it is not sucess. (No Image Caputre, NO …)
I can’t capture any image.

%E8%9E%A2%E5%B9%95%E5%BF%AB%E7%85%A7_2020-01-24_15-54-51
%E8%9E%A2%E5%B9%95%E5%BF%AB%E7%85%A7_2020-01-24_15-54-51763×829 68.4 KB

How do I fix this issue?