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

[Balint Reczey]

I agree that -unsigned- kernel packages are unlikely to pile up in /boot, but they are still versioned kernel packages and handling those uniformly helps in maintainence.
I also added linux-buildinfo to the patterns and an autopkgtest to detect new kernel packages not covered by patterns, thus we can catch the next variant of LP: #1698159 earlier.

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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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