I tried to test this issue over a clean install on the netbook of ubuntu mate 16.04 32 bits + indi + kstars, with the same result: gphoto is working, and ekos is not able to fully connect the camera, leaving it in a semiconnected, "yellow" state. This make me think that the problem may be related to the HW and not the SW (though the camera connected before to the same configuration)
I have generated a log file, as per Jasem's instructions, it is attached (activated only for "Capture" and "CCD"). The point is, I am not sure whether I am able to activate the debug log properly, since the Debug option in the "Options" tab is also in a "yellow" state, regardless of pushing "enable" or "disable". In any case, the log is the same I attached in my first post. After starting INDI and before connecting:
[2019-01-10T23:01:56.439 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < CONNECTION >
[2019-01-10T23:01:56.526 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < DRIVER_INFO >
[2019-01-10T23:01:56.681 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < POLLING_PERIOD >
[2019-01-10T23:01:56.721 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < DEBUG >
[2019-01-10T23:01:56.750 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < SIMULATION >
[2019-01-10T23:01:56.756 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < CONFIG_PROCESS >
[2019-01-10T23:01:56.761 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < ACTIVE_DEVICES >
[2019-01-10T23:01:56.784 CET DEBG ][ org.kde.kstars.indi] - < Canon DSLR EOS 1100D >: < DEVICE_PORT >
And only after pressing "Connect" in the Control panel, the following line is added:
[2019-01-10T23:02:45.971 CET DEBG ][ org.kde.kstars.ekos] - Connecting Canon DSLR EOS 1100D