dnsmasq and resolvconf don't play nicely on 21.10

[Chris Green]

I am trying to use dnsmasq on my [x]ubuntu 21.10 laptop.

I have disabled systemd.resolved (as I believe is necessary), I have
installed dnsmasq.

When I reboot I find that /etc/resolv.conf (symbolic link to
/run/resolvconf/resolv.conf) is empty and /run/dnsmasq/resolv.conf is
non-existent.  For dnsmasq to run correctly both of these files should
exist.

A clean installation of dnsmasq on a Raspberry Pi works OK, it has
/etc/resolv.conf with:-

    # Generated by resolvconf
    domain zbmc.eu
    nameserver 127.0.0.1

... and /run/dnsmasq/resolv.conf has:-

    # Generated by resolvconf
    nameserver 192.168.1.2

So is this a bug in Ubuntu or have I got some other part of the
resolvconf system misconfigured somehow?

I do see a couple of related errors in syslog:-

    Dec  4 16:02:02 t470 dnsmasq[882]: run-parts: /etc/resolvconf/update.d/dnsmasq exited with return code 1
    Dec  4 16:02:02 t470 dnsmasq[882]: run-parts: /etc/resolvconf/update.d/libc exited with return code 1


I can manually edit /etc/resolv.conf etc. to make things work but I
would much rather have the installation/configuration work right by
itself.

-- 
Chris Green