Please move over to using mn_shell-{command|process}[-root]@.service.
These are templates, so you have to add a suffix of your choice behind the
@, which also allows you to run more than one instance of each service.
The bootfs partition is now mounted under /boot/firmware, which means that the kernel images, initrds and other stuff now reside on the main system partition. Only the bootloaders and device trees remain.
Upgrading between major releases has never been supported really. As usual, you are much better off taking your configuration file off your old system and dropping it into a fresh one.
If you are using mn_cpufreq.service, please replace it with
mn_cpupower.service. The old service will likely be removed with the next
major Debian update.
We no longer have to make our own custom build, and the .checkout and .build scripts have therefore been removed.
If you have been relying on the speaker crossover functionality of zita-lrx, please consider moving to the LSP crossover plugin - you can add it to mod-host via the LV2 URL http://lsp-plug.in/plugins/lv2/crossover_stereo.
Nobody ever used it, and the x42 matrix mixer is a suitable replacement (its LV2 URL is http://gareus.org/oss/lv2/matrixmixer#i12o10).
With a more up-to-date jackd in Bookworm, we can finally track the latest mod-host development again after having to freeze it for most of bullseye.
Where possible, we are now no longer replacing the distro config files, but
using drop-ins as much as possible. This allows us to apply the changes we
need, and still benefit from baseline configuration updates provided by
upstream. This affects lighttpd, systemd-logind, and systemd-journald.