Simon,

Thanks for highlighting this. I am unfamiliar with the package, but have just
had a quick look at the source. In one sense this is not a Devuan-specific
bug. The same issue will be seen on a non-systemd Debian system. But, it is
certainly more exposed on Devuan. For that reason I would ideally prefer a
Debian fix that Devuan would inherit.

Adding an LSB initscript appears feasible. If
/lib/udev/rules.d/40-monitor-hotplug.rules then referenced service(8) rather
than systemctl, might that work for both systemd and non-systemd installations?

I note the creation of the udev rule is (curiously) embeded in ./Makefile.

And, then there would be the issue of getting our universal solution accepted in
Debian....

Let's try to get a working solution first.

Do you have either of a LSB initscript or udev rule that work without systemd?

Best wishes

Mark