[Bug 1821640] Re: Missing pattern for linux-image-unsigned keeps autoremovable kernels on the system

[Julian Andres Klode]

I mean, usually people should have linux-image-<version> installed, not
linux-image-unsigned - they are basically only artifacts used for
building the signed kernel images that are installed by the
metapackages.

Since there is no metapackage that pulls in unsigned kernels, there is
no reason to add unsigned kernels to that list, as they'll be manually
installed anyway.

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https://bugs.launchpad.net/bugs/1821640

Title:
  Missing pattern for linux-image-unsigned keeps autoremovable kernels
  on the system

Status in apt package in Ubuntu:
  Triaged

Bug description:
  Unattended-upgrades keeps versioned kernel packages because they don't
  match known kernel package patterns:

  ...
  Keeping auto-removable linux-modules-4.18.0-14-generic package(s) because it would also remove the following packages which should be kept in this step: linux-image-unsigned-4.18.0-14-generic
  ...

  For reproduction see LP: #1795696, but running u-u with --verbose.

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