It's now March, 2020.
And I'm getting the problems described above.
Several in times in the past few months, I have been able to upgrade my PIs' Raspian without problem.
But I noticed yesterday that my fileserver's clock was off by 10 min or so, even though the Raspberry had been rebooted several times in the past few months.
So I tried installing nptdate: ...
This is what it was for according to their website at https://www.collabora.com/about-us/our-work.html
They might have provided a browser or driver's according to my quick read 👍
They created the desktop environment after a tiny bit more reading of their webpage 😀
To have a complete update you need to connect to two internet addresses: to raspbian.raspberrypi.org for the default Debian cloned Raspbian repository defined in /etc/apt/sources.list and to archive.raspberrypi.org for the Raspberry Pi specific kernel and firmware in /etc/apt/sources.list.d/raspi.list. From the error messages I would suspect three conditions:...