upgrade failure from 21.10 to 22.04 due to PPA

[David Lang]

I had the kubuntu-backports PPA enabled and when I did do-release-upgrade -d from 21.10 to 22.04 the system crashed partway through the process. After rebooting, X would not start (white screen with a frowning computer telling me the system had a problem and I should contact my administrator)

after logging in from the command line and fixing broken/pending packages via apt, the system would boot, but only to the command line and startx would trigger the white error again.

when I attempted to do apt install kubuntu-desktop to try and fix things, I got the following error

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

I reported it to the kubuntu mailing list and they asked me to file a bug against this package.