Thanks for thorough reply. Much appreciated!
First - I was using the documentation that is publicly available at ka-lite.readthedocs.io/en/latest/
I then click on: Installation guide, Linux, RaspberryPI
When I said:
.. I meant that I completely omitted the last instructions in the RaspberryPI section of that page. They read:
You can also add the PPA, see Debian/Ubuntu: Subscribe to updates through a PPA, and then run sudo apt-get install ka-lite-raspberry-pi.
After installing, you can setup a Wifi hotspot using this guide: Raspberry Pi Wi-Fi
The last part of the second instruction, "Raspberry Pi Wifi" is a link. (I would paste it here but the forum platform tells me "Sorry but you can not post a link to that host"). When I follow the instructions on the linked page - that is when the Raspberry PI3 freezes up on all network interfaces.
By omitting that completely, I can run the Raspberry PI3 with network access via a router, and connect to it from other devices via its IP on the LAN. (192.168.0.37). But, that of course requires a router.
You are right - I should probably rather contribute to the docs than write lengthy posts here. However, at the moment I feel I am fully booked.
The new documentation looks much clearer! It does not seem to link to the problematic section about setting up a hotspot.