Indi currently does not seem to install properly from ppa on Ubuntu 16.04.6 LTS #49034
Just to clarify, you did install the Ubuntu 18.04.3 server image on the Pi4, then used that to install the Ubuntu Desktop environment? Because in some of your comments you are talking about Ubuntu 16.04. I don't know about an Ubuntu 16.04 image for the Pi4, that would not make much sense since the Pi4 came out when 16.04 was already obsolete.
VNC really does work painlessly on the Pi4 under Ubuntu 18.04, so that problem you are describing must be specific to the installation. (Although I did not try other desktop environments besides MATE)
There is one other thing you could try: Open the terminal on your desktop machine and SSH into your Pi4 ( $ ssh username@IPaddress of your Pi4 ). Then restart x11vnc from the Terminal ($ x11vnc -usepw -shared ).
Are you sure you set the correct HDMI_hotplug flag and the framebuffer values are correct?
Atlas Pro AZ-EQ, ASI1600MM-Pro, ASI120MM-S, ES102ED, WO-Z61, Nikon D3300, ASI-EFW, ZWO LRGB,Ha,O3,S2 filter set
Indi currently does not seem to install properly from ppa on Ubuntu 16.04.6 LTS #49293
Is there any solution to the indi-aagcloudwatcher-ng package dependency problem? I am unable to update the indi-full package because it says that the indi-aagcloudwatcher-ng package is uninstallable. I don't particularly like the idea of having to update the distro on the various systems I have indi on just in the hopes of getting around this problem.