I am facing exactly same issue, Canon DSLR sort of half connects. I am trying to set up a new machine with Ubuntu 16.04 32-bit and Indi/Ekos latest stable release. I have disabled the automount. I can control the camera using gphoto2 without any problem.

dee@Astro-Linux:~$ gphoto2 --auto-detect 
Model                          Port                                            
----------------------------------------------------------
Canon EOS 80D                  usb:001,002     
deepanshu@Astro-Linux:~$ gphoto2 --capture-image
New file is in location /capt0000.cr2 on the camera                            
dee@Astro-Linux:~$

But when using Ekos, I see exactly same thing as OP shared above. Yellow dot with nothing happening. Log also shows similar thing -
I'm clueless on how to fix this.
[2019-01-09T19:36:40.234 PST DEBG ][           org.kde.kstars.indi] - INDI: Starting local drivers...
[2019-01-09T19:36:40.235 PST DEBG ][           org.kde.kstars.indi] - Starting INDI Server:  ("-v", "-p", "7624", "-f", "/tmp/indififo58540e46") -f "/tmp/indififo58540e46"
[2019-01-09T19:36:40.238 PST DEBG ][           org.kde.kstars.indi] - INDI Server Started?  true
[2019-01-09T19:36:40.238 PST DEBG ][           org.kde.kstars.indi] - INDI: INDI Server started locally on port  7624
[2019-01-09T19:36:40.238 PST DEBG ][           org.kde.kstars.indi] - Starting INDI Driver  "indi_canon_ccd"
[2019-01-09T19:36:40.238 PST DEBG ][           org.kde.kstars.indi] - Adding managed driver "Canon DSLR"
[2019-01-09T19:36:40.238 PST DEBG ][           org.kde.kstars.indi] - INDIListener: Adding a new client manager to INDI listener..
[2019-01-09T19:36:40.238 PST DEBG ][           org.kde.kstars.indi] - INDI: Connecting to local INDI server on port  7624  ...
[2019-01-09T19:36:40.341 PST DEBG ][           org.kde.kstars.indi] - INDI: Connecting to local INDI server on port  7624  ...
[2019-01-09T19:36:40.341 PST DEBG ][           org.kde.kstars.indi] - INDI server connected.
[2019-01-09T19:36:40.341 PST DEBG ][           org.kde.kstars.indi] - Connection to INDI server is successful
[2019-01-09T19:36:40.342 PST DEBG ][           org.kde.kstars.indi] - Received new device Canon DSLR EOS 80D
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: startup: /usr/bin/indiserver -v -p 7624 -f /tmp/indififo58540e46 "
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: listening to port 7624 on fd 3"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "FIFO: start indi_canon_ccd"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "FIFO: Starting driver indi_canon_ccd"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: pid=2330 rfd=4 wfd=7 efd=8"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: Number of cameras detected: 1."
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: Detected camera model Canon EOS 80D on port usb:001,002"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on Telescope Simulator.TELESCOPE_INFO"
[2019-01-09T19:36:40.349 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on Telescope Simulator.GEOGRAPHIC_COORD"
[2019-01-09T19:36:40.350 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on Focuser Simulator.ABS_ROTATOR_ANGLE"
[2019-01-09T19:36:40.350 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on CCD Simulator.FILTER_SLOT"
[2019-01-09T19:36:40.350 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on CCD Simulator.FILTER_NAME"
[2019-01-09T19:36:40.350 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Driver indi_canon_ccd: snooping on SQM.SKY_QUALITY"
[2019-01-09T19:36:40.350 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:40: Client 5: new arrival from 127.0.0.1:47258 - welcome!"
[2019-01-09T19:36:40.350 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  ""
[2019-01-09T19:36:40.364 PST DEBG ][           org.kde.kstars.indi] - INDIListener: New device Canon DSLR EOS 80D
[2019-01-09T19:36:40.389 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < CONNECTION >
[2019-01-09T19:36:40.409 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < DRIVER_INFO >
[2019-01-09T19:36:40.412 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < POLLING_PERIOD >
[2019-01-09T19:36:40.415 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < DEBUG >
[2019-01-09T19:36:40.416 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < SIMULATION >
[2019-01-09T19:36:40.418 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < CONFIG_PROCESS >
[2019-01-09T19:36:40.418 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < ACTIVE_DEVICES >
[2019-01-09T19:36:40.419 PST DEBG ][           org.kde.kstars.indi] - < Canon DSLR EOS 80D >: < DEVICE_PORT >
[2019-01-09T19:36:47.941 PST DEBG ][           org.kde.kstars.indi] - INDI: Stopping local drivers...
[2019-01-09T19:36:47.941 PST DEBG ][           org.kde.kstars.indi] - Removing managed driver "Canon DSLR"
[2019-01-09T19:36:47.941 PST DEBG ][           org.kde.kstars.indi] - INDIListener: Removing device Canon DSLR EOS 80D with unique label  ""
[2019-01-09T19:36:47.943 PST DEBG ][           org.kde.kstars.indi] - INDIListener: Removing client manager for server localhost @ 7624
[2019-01-09T19:36:47.943 PST DEBG ][           org.kde.kstars.indi] - INDI server disconnected. Exit code: 0
[2019-01-09T19:36:47.943 PST DEBG ][           org.kde.kstars.indi] - INDI server disconnected. Exit code: 0
[2019-01-09T19:36:47.943 PST DEBG ][           org.kde.kstars.indi] - Stopping INDI Driver  "indi_canon_ccd"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - Stopping INDI Server  "localhost" @ "7624"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:47: Client 5: read EOF"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "2019-01-10T03:36:47: Client 5: shut down complete - bye!"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "FIFO: stop indi_canon_ccd"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "dp->name: indi_canon_ccd - tDriver: indi_canon_ccd"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "name:  - dp->dev[0]: Canon DSLR EOS 80D"
[2019-01-09T19:36:47.944 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "FIFO: Shutting down driver: indi_canon_ccd"
[2019-01-09T19:36:47.945 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "<delProperty device=\"Canon DSLR EOS 80D\"/>"
[2019-01-09T19:36:47.945 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  "Child process 2330 died"
[2019-01-09T19:36:47.945 PST DEBG ][           org.kde.kstars.indi] - INDI Server:  ""
[2019-01-09T19:36:47.945 PST WARN ][                       default] - QIODevice::write (QTemporaryFile, "/tmp/kstars.El2316"): device not open
[2019-01-09T19:36:47.945 PST DEBG ][           org.kde.kstars.ekos] - Resetting Ekos Manager...


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