[Bug 2046871] Re: migrate to upstream release/coreNN branch

[Lukas Märdian]

I can confirm that the Noble debdiff matches the v88 version that was
uploaded to Oracular and also matches the release/core88 upstream branch
(plus the Debian/Ubuntu additions in debian/)

So this is essentially a full-version backport from Oracular
(1:0~88.12113-gitd7d581b7-0ubuntu1) to Noble, which also happens to
change the versioning scheme. I think the new versioning scheme is
sensible. But the fact that this is a full-version backport wasn't very
clear to me, at first. (It would be nice to have this clearly stated in
debian/changelog)


I couldn't find any SRU exception for backport-iwlwifi-dkms, and I'm unclear of how it would match the SRU policy. But I see precedence of full-version backports to Jammy/Focal/Bionic. So I'll leave it to the SRU team to make a call about accepting/rejecting it from the queue.

Otherwise, lgtm and I've sponsored it to Noble and unsubscribed ~ubuntu-
sponsors.

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https://bugs.launchpad.net/bugs/2046871

Title:
  migrate to upstream release/coreNN branch

Status in backport-iwlwifi-dkms package in Ubuntu:
  Fix Released
Status in backport-iwlwifi-dkms source package in Noble:
  In Progress
Status in backport-iwlwifi-dkms source package in Oracular:
  Fix Released

Bug description:
  [SRU Justification]

  [Impact]

  To migrate the a version scheme that is well-known to all parties.

  [Fix]

  Update debian upstream version to 1:0~NN.ddddd-git<hash>. Also based
  on the upstream release/core88 HEAD at the time.

  [Test Case]

  1. install kernel headers packages. This should include kernel headers for generic-6.8, oem-6.8, linux-azure, linux-lowlatency according to kernel-versions dkms map
  2. install backport-iwlwifi-dkms from -proposed and trigger dkms builds

  [Where problems could occur]

  iwlwifi dkms provides backward compatibility, but new features may
  still depend on new firmware, which may not be available unless SRU-ed
  back to noble.

  [Other Info]

  For Jammy, we will have oem-6.8 and hwe-6.8 soon, but no further plan
  for 6.10 kernels. Currently it has nothing depending on a new iwlwifi
  dkms release, so it will be skipped from this SRU, leaving only Noble
  as the target.

  ========== original bug report ==========

  In the past we're tracking the upstream master branch and create new
  builds upon the lastest HEAD available at the moment. This, however,
  creates ambiguity for tracking backport-iwlwifi development &
  releases, because the upstream puts more emphasis on the coreNN
  releases instead of the development branch master when investigating
  support of new hardware models.

  Currently backport-iwlwifi-dkms/noble, versioned 11510-0ubuntu1, is
  built from upstream revision 11520, which maps to upstream git commit
  41e354fb5f32 that is a few commits behind the release/core84 HEAD
  commit 6d8764841123 (revision 11517). To migrate to release/core84
  branches, it follows we will have to rebase our work to release/core84
  HEAD and to fix debian version with an additional epoch. The proposed
  new version nubmer is 1:84.<rev>-git<hash>-0ubuntu1.

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