Am 06.12.20 um 17:04 schrieb Josh Jones:
It is the root filesystem which is failing to be remounted read-only -
this is a simple setup with only one filesystem for the whole system.
It seems to be happening right at the very very end of the shutdown
sequence - I have attached a picture of the error; quality is poor
because I had to capture it from video footage. Is there any way to
even have anything saved to disk so late in the sequence?
With the shutdown hook described in README.Debian and
https://freedesktop.org/wiki/Software/systemd/Debugging/#index2h1
(install the hook as /lib/systemd/system-shutdown/debug.sh without the
/usr prefix) you can gather logs right until the end
Thanks for your help and attention with this; I'm willing to try
whatever you suggest to help work out what's going on - if that is even
possible..!
You might also have a look at
https://salsa.debian.org/systemd-team/systemd/-/blob/debian/master/debian/README.Debian
"Debugging boot/shutdown problems"
to gather logs after journald has been shut down.
