problems upgrading to kubuntu 20.04 (jammy)

[David Lang]

As I frequently do about this time before a release, I attempted to upgrade my 
system to the latest release (do-release-upgrad -d) but this time I ran into 
some grief, some of which I've worked though, but kde/X is still not happy.

I kicked off the upgrade, confirmed that I wanted it to download all the 
packages, and it started the download. Some (significant) time later I came back 
to the machine and the screen was blan (in power saving mode, normally disabled 
on this desktop). I rebooted the machine and got an error that something went 
wrong, press the button to logout and contact the administrator (me). I rebooted 
again (as the system was unresponsive, including alt fn and contrl-alt fn, 
control-al-del and control-alt-backspace. I then did alt f2 and logged in at the 
command line and went though manual apt commands to get the packages installed 
(including --fix-broken). I got htings to where it is no longer complaining 
about any broken packages.

But when I boot, I only get the command line login, if I login and run startx I 
get the error that something has gone wrong and the system is unresponsive.

I have attempted to do apt install kubuntu-desktop, but get the following:


Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  plasma-workspace : Depends: libkworkspace5-5 (= 4:5.24.3-0ubuntu1) but 4:5.24.3-0ubuntu2~ubuntu21.10~ppa1 is to be installed
                     Depends: libtaskmanager6 (= 4:5.24.3-0ubuntu1) but 4:5.24.3-0ubuntu2~ubuntu21.10~ppa1 is to be installed
                     Recommends: appmenu-gtk3-module but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

I don't really want to tell apt to ignore dependencies, but that would be my 
next step. But I figured I'd ask for help first.

David Lang