[Bug 1853861] [NEW] [SRU] Unattended-upgrades does not apply updates when MinimalSteps is disabled and there are autoremovable kernels

[Balint Reczey]

Public bug reported:

[Impact]

 * When autoremovable kernel packages are present on the system, there are updates to apply and Unattended-Upgrade::MinimalSteps is set to "false", the autoremovable kernel packages are not removed and the updates are not applied.
 * The root cause is u-u not cleaning the dirty cache between operations and also relying on having a cache with packages marked to be installed when applying updates in one shot.
 * The fix is clearing the cache between operations and marking packages before installing them in one shot.

[Test Case]

[Regression Potential]

[Other Info]

** Affects: unattended-upgrades (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1853861

Title:
  [SRU] Unattended-upgrades does not apply updates when MinimalSteps is
  disabled and there are autoremovable kernels

Status in unattended-upgrades package in Ubuntu:
  New

Bug description:
  [Impact]

   * When autoremovable kernel packages are present on the system, there are updates to apply and Unattended-Upgrade::MinimalSteps is set to "false", the autoremovable kernel packages are not removed and the updates are not applied.
   * The root cause is u-u not cleaning the dirty cache between operations and also relying on having a cache with packages marked to be installed when applying updates in one shot.
   * The fix is clearing the cache between operations and marking packages before installing them in one shot.

  [Test Case]

  [Regression Potential]

  [Other Info]

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