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Re: Disappearing shim-signed after failed dist-upgrade

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On Tue 29 Jun 2021, at 17:11, David Wright <deblis@lionunicorn.co.uk> wrote:
> On Tue 29 Jun 2021 at 08:29:22 (+0300), Andrei POPESCU wrote:
> > On Lu, 28 iun 21, 09:46:17, David Wright wrote:
> > > 
> > > But your evening run of   apt-get -y dist-upgrade   was unconstrained,
> > > and so shim-signed could be removed because it was no longer being
> > > held onto as a Depends or Recommends.
> > 
> > Except that `apt-get dist-upgrade` doesn't do that (`autoremove` does), 
> > it only removes packages when it determines that it's needed to complete 
> > the dist-upgrade, so a Conflicts or Breaks with an upgraded package.
> 
> So we can presume, perhaps, that it's a case of ranking:
> shim-signed being installed as a Recommends is ranked lower
> than upgrading shim-signed-common, and so it gets removed.
> 
> All my systems were upgraded successfully because I ignored
> any arm64 bug reports, so all my lists and caches have been
> refreshed since, and I don't have access to the control data
> for shim-signed/1.33+15+1533136590.3beb971-7.
> 
> Perhaps others can make better informed guesses.
> 
> Cheers,
> David.
> 
> 

I suspect "aptitude why shim-signed" may not remain relevant, but if so:

$ aptitude why shim-signed
i   grub-efi-amd64-signed Recommends shim-signed

apt history shows grub-efi-amd64-signed was last upgraded along with other grub* packages, apparently without issue, on 2021-03-03.

Even if I had made use of upgrade rather than dist-upgrade, presumably a dist-upgrade would have been indicated here (by the existence of packages kept back) and the same position would have resulted - ie. having to wait for a potentially essential package to be made available in upgraded form so it could be reinstalled so that it could be further upgraded in future... no?

$ aptitude why shim-signed-common
i   shim-signed Depends shim-signed-common (>= 1.36~1+deb10u2+15.4-5~deb10u1)

It seems the upgrade of shim-signed-common may have removed shim-signed.

Shouldn't essential packages involved in dependencies only ever be available for upgrade together, unless perhaps the dependency >=version remains satisfied?

Before succeeding in installing the newer version of shim-signed, I did try installing the version originally installed with Buster, but apt said it wasn't available.  In the end I didn't need to attempt installing from eg. DVD, but couldn't this be impossible too due to other conflicts?

In short, should a boot-related package ever be removed and not replaced in the same upgrade operation?

Is it to be expected to have to keep an eye on this sort of thing?

Thanks all.
Gareth

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Thread

Disappearning shim-signed after failed dist-upgrade "Gareth Evans" <donotspam@fastmail.fm> - 2021-06-22 10:10 +0200
  Re: Disappearing shim-signed after failed dist-upgrade David Wright <deblis@lionunicorn.co.uk> - 2021-06-22 20:20 +0200
    Re: Disappearing shim-signed after failed dist-upgrade "Gareth Evans" <donotspam@fastmail.fm> - 2021-06-27 06:50 +0200
      Re: Disappearing shim-signed after failed dist-upgrade David Wright <deblis@lionunicorn.co.uk> - 2021-06-28 16:50 +0200
        Re: Disappearing shim-signed after failed dist-upgrade Andrei POPESCU <andreimpopescu@gmail.com> - 2021-06-29 07:30 +0200
          Re: Disappearing shim-signed after failed dist-upgrade David Wright <deblis@lionunicorn.co.uk> - 2021-06-29 18:20 +0200
            Re: Disappearing shim-signed after failed dist-upgrade "Gareth Evans" <donotspam@fastmail.fm> - 2021-06-29 23:50 +0200
              Re: Disappearing shim-signed after failed dist-upgrade "Gareth Evans" <donotspam@fastmail.fm> - 2021-06-30 04:30 +0200
              Re: Disappearing shim-signed after failed dist-upgrade David Wright <deblis@lionunicorn.co.uk> - 2021-06-30 05:50 +0200
              Re: Disappearing shim-signed after failed dist-upgrade Andrei POPESCU <andreimpopescu@gmail.com> - 2021-06-30 10:20 +0200

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