[Bug 2039284] Re: v4l2loopback-dkms from mantic is not compatible with kernel from lunar and fails when upgrading from lunar to mantic

[Steve Langasek]

Preferred outcome here is to fix the package that breaks across upgrades
(v4l2loopback), not adding a quirk in ubuntu-release-upgrader. I don't
think there is an existing "upgrade this before this" quirk type in
u-r-u and even if there is, that is better expressed by package
Breaks/Depends directly in the archive.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

** Changed in: v4l2loopback (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/2039284

Title:
  v4l2loopback-dkms from mantic is not compatible with kernel from lunar
  and fails when upgrading from lunar to mantic

Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid
Status in v4l2loopback package in Ubuntu:
  Triaged

Bug description:
  When upgrading from lunar to mantic I got this error:

  ```
  Loading new v4l2loopback-0.12.7 DKMS files...
  Building for 6.2.0-33-generic 6.5.0-9-generic
  Building initial module for 6.2.0-33-generic
  ERROR (dkms apport): kernel package linux-headers-6.2.0-33-generic is not supported
  Error! Bad return status for module build on kernel: 6.2.0-33-generic (x86_64)
  Consult /var/lib/dkms/v4l2loopback/0.12.7/build/make.log for more information.
  dpkg: error processing package v4l2loopback-dkms (--configure):
   installed v4l2loopback-dkms package post-installation script subprocess returned error exit status 10
  Processing triggers for man-db (2.11.2-3) ...
  Errors were encountered while processing:
   v4l2loopback-dkms
  ```

  It looks like v4l2loopback-dkms from mantic is not compatible with
  lunar kernel, but since I'm upgrading from lunar to mantic I'm still
  running the lunar kernel.

  I was able to finish the mantic installation by doing:

  ```
  apt-get remove v4l2loopback-dkms
  apt-get --fix-broken install
  ```

  I'll have to manually reinstall v4l2loopback-dkms after the reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: v4l2loopback-dkms (not installed)
  ProcVersionSignature: Ubuntu 6.2.0-33.33-generic 6.2.16
  Uname: Linux 6.2.0-33-generic x86_64
  NonfreeKernelModules: vboxnetadp vboxnetflt vboxdrv amddrm_ttm_helper amdttm amdxcp amddrm_buddy amd_sched amdkcl
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: GNOME
  Date: Fri Oct 13 16:04:02 2023
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: v4l2loopback
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.default.apport: [modified]
  mtime.conffile..etc.default.apport: 2018-06-16T17:39:00.798346

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