Michal Jaegermann (michal(a)harddata.com) said:
Well, Lennart says explicitely that with systemd and /usr mounted
on its own file system things like audio, or printing or plug'n'play
will not work and that he does not care as they were broken anyway.
Maybe in some of his warped universe as I can assure you that up and
including Fedora 14, and with /usr like the above, all these things
do work just fine.
Essentially, you have to ensure that everything called during the
boot cycle up until the point that /usr is mounted, including any
and all programs called from udev rules, have all the libraries,
configuration, and data they need to write to, available on the
root partition. (*)
It's something that certainly can be made to work where problems are
found, with enough effort - that would be auditing that would have
to be done on each release (potentially each update!). So, then
it's a cost-benefit ratio, and weigh that at against the usage case
of separate /usr (which is.... ?)
Bill