Re: Bug#915880: lvm2: Dependency on liblz4-1 causes /sbin binaries to depend on /usr/lib libraries

[Per Lundberg <perlun@gmail.com>]

Hi Ian,

On Tue, Dec 11, 2018 at 10:35 AM Ian Campbell <ijc@debian.org> wrote:

> The note you quoted is simply saying that the kernel packages in
> Debian, together with the initramfs generators, meet this requirement
> so if you are using those you need not worry about the specifics.
>
> I don't know if any of the above applies to Ubuntu (where you've
> observed an actual failure), so if you have found a case where the
> initramfs generator is not doing the right thing for that distro you
> should open a bug with them.

Thanks. I am not sure what the underlying problem with the Ubuntu /usr
issue we noted is, haven't investigated it further on Ubuntu proper.
We just noticed that:

- we got a Busybox at startup (on a clean 18.04 Ubuntu install)
because /usr wasn't mounted properly (it couldn't find the volume)
- /sbin/lvm was linked towards libraries on /usr/lib, making debugging
it hard (since I couldn't run lvscan or anything)
- that problem had its root in the Debian package, which had the same
list of library dependences.

Let's leave this closed for now; I might come back later but I'd need
to investigate this more on a clean Ubuntu 18.04 install and
potentially open an issue with them. Given the usrmerge coming up, the
difference between depending on /lib and /usr/lib might be irrelevant
shortly, as far as Debian is concerned.

Thanks for your feedback and thanks to you also, Adrian.