[Bug 1992513] Re: apt will not install nvidia-driver-470-server if nvidia-driver-450-server is installed and out of date

[Julian Andres Klode]

I think we debugged this recently but I'm not sure where the end result
of this is that we do not mark packages for removal that have an upgrade
available, hence we end up without a removal request after the first
stage solver, and the Conflicts solver that runs after can't solve that.

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Title:
  apt will not install nvidia-driver-470-server if nvidia-
  driver-450-server is installed and out of date

Status in apt package in Ubuntu:
  Triaged
Status in nvidia-graphics-drivers-450-server package in Ubuntu:
  New
Status in nvidia-graphics-drivers-470-server package in Ubuntu:
  New

Bug description:
  apt/jammy

  apt will refuse to install nvidia-driver-470-server if nvidia-driver-450-server is installed *and* out of date. I can reproduce this by disabling all but the jammy release pocket, installing the old n-d-450-s from there, and then enabling updates and trying to install n-v-470-s (where a new
  n-d-450-s is available):

  # libnvidia-gl-450-server has an update available
  root at dannf-apt-jammy:/var/cache# apt install --dry-run libnvidia-gl-470-server -o Debug::pkgProblemResolver=yes
  Reading package lists... Done
  Building dependency tree... Done
  Reading state information... Done

  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   libnvidia-common-450-server : Conflicts: libnvidia-common
   libnvidia-common-470-server : Conflicts: libnvidia-common
  E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

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