[Pkg-systemd-maintainers] Bug#718190: Bug#718190: systemd: sometimes computer doesn't boot. It seems a problem with lvm.

[Michael Stapelberg]

Hi Antonio-M.,

"Antonio-M. Corbi Bellot" <antonio.corbi at ua.es> writes:
> I think I've all the logs you asked for.
Thanks for providing the logs. They reveal that you have /usr on a
separate volume and don’t mount it in the initramfs, which is not
supported:

[ 3.840308] systemd[1]: /usr appears to be on its own filesytem and is
not already mounted. This is not a supported setup. Some things will
probably break (sometimes even silently) in mysterious ways. Consult
http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for
more information.

I can see entries in your working log where the volume containing usr is
recognized as plugged, whereas in the non-working log these entries are
missing and instead a bunch of processes get killed.

This might well be a race condition that makes the boot work sometimes
and sometimes not. Even if it later turns out that this was not the
actual problem, it is definitely a good start to get this issue out of
the way first.

So, you have two options:

1) In case you definitely want to keep /usr separate, you need to mount
   it in the initramfs. See
   http://lists-archives.com/debian-devel/189709-mounting-usr-in-the-initramfs.html

2) You could boot a live cd and move /usr to the root volume, then
   delete the separate /usr volume.

Please do that and report back. If you still encounter the issue, please
re-gather the logs and attach the new logs. Thanks!

-- 
Best regards,
Michael