It's possible to set EKOS and the driver to get verbose logging of the startup commands in the driver this is what I did:
Edit the profile so the drivers do not start automatically.
Set the logging in the EKOS setup to verbose and to file for the mount.
Start the INDI Control panel and in the Celestron GPS and Options tab enable logging and check all the debug levels, logging levels and log levels.
Save the configuration.
Only now connect the driver.
The log file will now show the full details from the start mine shows this:
[2019-10-01T07:37:33.432 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Toggle Logging Level -- Scope Verbose "
[2019-10-01T07:37:36.062 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Session log file /home/chris/.indi/logs/2019-10-01/indi_celestron_gps/indi_celestron_gps_06:36:56.log "
[2019-10-01T07:37:51.800 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Connecting to /dev/ttyUSB0 @ 9600 "
[2019-10-01T07:37:51.802 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Port FD 4 "
[2019-10-01T07:37:51.802 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Connection successful, attempting handshake... "
[2019-10-01T07:37:51.802 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Initializing Celestron using Kx CMD... "
[2019-10-01T07:37:51.802 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <Kx> "
[2019-10-01T07:37:56.817 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[ERROR] Serial read error: Timeout error "
[2019-10-01T07:37:56.858 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <Kx> "
[2019-10-01T07:37:56.870 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <x#> "
[2019-10-01T07:37:56.881 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Celestron AVX is online. "
[2019-10-01T07:37:56.882 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully saved for DEVICE_PORT. "
[2019-10-01T07:37:56.895 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully saved for DEVICE_BAUD_RATE. "
[2019-10-01T07:37:56.895 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully saved for CONNECTION_MODE. "
[2019-10-01T07:37:56.896 BST INFO ][ org.kde.kstars.ekos] - Celestron AVX Version: "3.2" Interface: 5 is connected.
[2019-10-01T07:37:56.896 BST DEBG ][ org.kde.kstars.ekos] - 1 devices connected out of 3
[2019-10-01T07:37:57.087 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Getting controller version... "
[2019-10-01T07:37:57.088 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <V> "
[2019-10-01T07:37:57.091 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <05 1F 23> "
[2019-10-01T07:37:57.101 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Controller version: 5.31 "
[2019-10-01T07:37:57.102 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Getting controller variant... "
[2019-10-01T07:37:57.102 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <v> "
[2019-10-01T07:37:57.102 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <11 23> "
[2019-10-01T07:37:57.102 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Getting controller model... "
[2019-10-01T07:37:57.103 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <m> "
[2019-10-01T07:37:57.103 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <14 23> "
[2019-10-01T07:37:57.106 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Mount model: AVX "
[2019-10-01T07:37:57.107 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Getting RA firmware version... "
[2019-10-01T07:37:57.107 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <50 01 10 FE 00 00 00 02> "
[2019-10-01T07:37:57.107 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <07 0F 23> "
[2019-10-01T07:37:57.107 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Getting DEC firmware version... "
[2019-10-01T07:37:57.108 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <50 01 11 FE 00 00 00 02> "
[2019-10-01T07:37:57.108 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <07 0F 23> "
[2019-10-01T07:37:57.108 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Getting focuser version... "
[2019-10-01T07:37:57.108 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Does focuser exist... "
[2019-10-01T07:37:57.108 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <50 01 12 FE 00 00 00 04> "
[2019-10-01T07:37:59.366 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Received 6 bytes, expected 5 <00 00 00 00 00 23> "
[2019-10-01T07:37:59.367 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <Kx> "
[2019-10-01T07:37:59.381 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <x#> "
[2019-10-01T07:37:59.382 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] No focuser found, 1 "
[2019-10-01T07:37:59.382 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Firmware Info HC Ver 5.31 model AVX NexStar GEM mount, HW Ver 7.15 "
[2019-10-01T07:37:59.382 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <t> "
[2019-10-01T07:37:59.403 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <02 23> "
[2019-10-01T07:37:59.405 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully saved. "
[2019-10-01T07:37:59.405 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Celestron mount tracking, mode EQ N "
[2019-10-01T07:37:59.406 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < ON_COORD_SET >
[2019-10-01T07:37:59.407 BST INFO ][ org.kde.kstars.ekos] - "Celestron AVX is online."
[2019-10-01T07:38:00.103 BST INFO ][ org.kde.kstars.ekos.mount] - "Warning: Overriding Oynx configuration."
[2019-10-01T07:38:00.559 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < EQUATORIAL_EOD_COORD >
[2019-10-01T07:38:00.559 BST INFO ][ org.kde.kstars.ekos] - "Celestron AVX is online."
[2019-10-01T07:38:00.563 BST INFO ][ org.kde.kstars.ekos.mount] - "Warning: Overriding Oynx configuration."
[2019-10-01T07:38:00.599 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_ABORT_MOTION >
[2019-10-01T07:38:00.617 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_TRACK_MODE >
[2019-10-01T07:38:00.635 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_TRACK_STATE >
[2019-10-01T07:38:00.653 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_MOTION_NS >
[2019-10-01T07:38:00.678 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_MOTION_WE >
[2019-10-01T07:38:00.689 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_SLEW_RATE >
[2019-10-01T07:38:00.692 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TARGET_EOD_COORD >
[2019-10-01T07:38:00.697 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TIME_UTC >
[2019-10-01T07:38:00.717 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < GEOGRAPHIC_COORD >
[2019-10-01T07:38:00.736 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_PARK >
[2019-10-01T07:38:00.766 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_PARK_POSITION >
[2019-10-01T07:38:00.779 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_PARK_OPTION >
[2019-10-01T07:38:00.781 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_PIER_SIDE >
[2019-10-01T07:38:00.803 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < APPLY_SCOPE_CONFIG >
[2019-10-01T07:38:00.809 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < USEJOYSTICK >
[2019-10-01T07:38:00.812 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < Firmware Info >
[2019-10-01T07:38:00.826 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] InitPark: No Park data in file /home/chris/.indi/ParkData.xml: No such file or directory "
[2019-10-01T07:38:00.831 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Mount is unparked. "
[2019-10-01T07:38:00.832 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Setting Park Axis1 to 0.00 "
[2019-10-01T07:38:00.832 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Setting Park Axis2 to 0.00 "
[2019-10-01T07:38:00.832 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Setting Default Park Axis1 to 0.00 "
[2019-10-01T07:38:00.833 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Setting Default Park Axis2 to 0.00 "
[2019-10-01T07:38:00.833 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < Use Pulse Cmd >
[2019-10-01T07:38:00.872 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_TIMED_GUIDE_NS >
[2019-10-01T07:38:00.925 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < TELESCOPE_TIMED_GUIDE_WE >
[2019-10-01T07:38:00.926 BST INFO ][ org.kde.kstars.ekos] - "Guider port from Celestron AVX is ready."
[2019-10-01T07:38:01.153 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <i> "
[2019-10-01T07:38:01.153 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <07 29 23 0A 01 13 00 01 23> "
[2019-10-01T07:38:01.158 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Mount UTC offset is 0.00. UTC time is 2019-10-01T07:41:35 "
[2019-10-01T07:38:01.159 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <w> "
[2019-10-01T07:38:01.159 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <33 24 29 00 00 2B 11 01 23> "
[2019-10-01T07:38:01.159 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Mount latitude 51.6114 longitude 359.2786 "
[2019-10-01T07:38:01.159 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:01.159 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0C00,40000000#> "
[2019-10-01T07:38:01.160 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[SCOPE] RA-DEC ( 1:10:57,90:00:00) "
[2019-10-01T07:38:01.160 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <p> "
[2019-10-01T07:38:01.160 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <E#> "
[2019-10-01T07:38:01.160 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] latitude 51.6114, sop E, PierSide W "
[2019-10-01T07:38:01.161 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <J> "
[2019-10-01T07:38:01.161 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <01 23> "
[2019-10-01T07:38:01.161 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:01.162 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0C00,40000000#> "
[2019-10-01T07:38:01.162 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[SCOPE] RA-DEC ( 1:10:57,90:00:00) "
[2019-10-01T07:38:01.162 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <p> "
[2019-10-01T07:38:01.162 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <E#> "
[2019-10-01T07:38:01.163 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] latitude 51.6114, sop E, PierSide W "
[2019-10-01T07:38:01.183 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Loading device configuration... "
[2019-10-01T07:38:01.195 BST DEBG ][ org.kde.kstars.indi] - < Celestron AVX >: < SYSTEM_PORTS >
[2019-10-01T07:38:01.198 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Toggle Debug Level -- Scope Verbose "
[2019-10-01T07:38:01.199 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Toggle Logging Level -- Scope Verbose "[2019-10-01T07:38:01.205 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Session log file /home/chris/.indi/logs/2019-10-01/indi_celestron_gps/indi_celestron_gps_06:36:56.log "
[2019-10-01T07:38:01.205 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Active Snoop, driver: Dome Simulator, property: DOME_PARK "
[2019-10-01T07:38:01.210 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Pulse guiding is enabled. "
[2019-10-01T07:38:01.215 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Device configuration applied. "
[2019-10-01T07:38:01.215 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully loaded. "
[2019-10-01T07:38:01.216 BST INFO ][ org.kde.kstars.ekos.mount] - "Telescope info updated successfully."
[2019-10-01T07:38:01.223 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Saving device configuration... "
[2019-10-01T07:38:01.227 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Device configuration saved. "
[2019-10-01T07:38:01.227 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully saved. "
[2019-10-01T07:38:01.232 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Saving device configuration... "
[2019-10-01T07:38:01.237 BST INFO ][ org.kde.kstars.indi] - Celestron AVX : "[INFO] Device configuration saved. "
[2019-10-01T07:38:01.237 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] Configuration successfully saved. "
[2019-10-01T07:38:01.237 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:01.238 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0D00,40000000#> "
[2019-10-01T07:38:01.238 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[SCOPE] RA-DEC ( 1:10:57,90:00:00) "
[2019-10-01T07:38:01.238 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <p> "
[2019-10-01T07:38:01.238 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <E#> "
[2019-10-01T07:38:01.238 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] latitude 51.6114, sop E, PierSide W "
[2019-10-01T07:38:01.790 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:01.861 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0D00,40000000#> "
[2019-10-01T07:38:01.867 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[SCOPE] RA-DEC ( 1:10:57,90:00:00) "
[2019-10-01T07:38:01.867 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <p> "
[2019-10-01T07:38:01.899 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <E#> "
[2019-10-01T07:38:01.899 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] latitude 51.6114, sop E, PierSide W "
[2019-10-01T07:38:02.895 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:02.964 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0B00,40000000#> "
[2019-10-01T07:38:02.965 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[SCOPE] RA-DEC ( 1:10:57,90:00:00) "
[2019-10-01T07:38:02.966 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <p> "
[2019-10-01T07:38:02.995 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <E#> "
[2019-10-01T07:38:02.996 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] latitude 51.6114, sop E, PierSide W "
[2019-10-01T07:38:03.997 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:04.068 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0C00,40000000#> "
[2019-10-01T07:38:04.069 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[SCOPE] RA-DEC ( 1:10:57,90:00:00) "
[2019-10-01T07:38:04.070 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <p> "
[2019-10-01T07:38:04.100 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <E#> "
[2019-10-01T07:38:04.100 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] latitude 51.6114, sop E, PierSide W "
[2019-10-01T07:38:05.100 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] CMD <e> "
[2019-10-01T07:38:05.171 BST DEBG ][ org.kde.kstars.indi] - Celestron AVX : "[DEBUG] RES <0C9D0C00,40000000#> "
Can you try this please and send the log. Probably best to set up a test profile. There should be no need to make any other sort of connection or get an alignment, all I did was a quick align
Chris