[Bug 1580509] [NEW] old kernels block distribution upgrade

[Michael]

Public bug reported:

When trying to upgrade from 15.10 to 16.04 the upgrade process stops complaining about too little diskspace. The hint to run 'aptitude clean' does not help, because the diskspace is blocked by several old kernels which are not affected by the cleanup.
At least the hint should be extended to give an unexperienced user a chance to run the update without help of a more experienced user.

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  old kernels block distribution upgrade

Status in apt package in Ubuntu:
  New

Bug description:
  When trying to upgrade from 15.10 to 16.04 the upgrade process stops complaining about too little diskspace. The hint to run 'aptitude clean' does not help, because the diskspace is blocked by several old kernels which are not affected by the cleanup.
  At least the hint should be extended to give an unexperienced user a chance to run the update without help of a more experienced user.

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