[Bug 1742903] Re: Microcode updates require a reboot to apply, but package postinst doesn't touch /run/reboot-required

[Dimitri John Ledkov]

but it may need to be more smart; e.g. check the new microcode revisions
vs currently loaded; to see if there was an update to microcode for this
system, actually

** Changed in: intel-microcode (Ubuntu Bionic)
     Assignee: (unassigned) => Dimitri John Ledkov (xnox)

** Changed in: intel-microcode (Ubuntu Bionic)
    Milestone: None => ubuntu-18.03

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Title:
  Microcode updates require a reboot to apply, but package postinst
  doesn't touch /run/reboot-required

Status in intel-microcode package in Ubuntu:
  Triaged
Status in intel-microcode source package in Bionic:
  Triaged

Bug description:
  The intel-microcode postinst script prints this text to standard error

      intel-microcode: microcode will be updated at next boot

  but tools like unattended-upgrades don't parse stderr, they expect a
  /run/reboot-required to exist to tell them that a reboot is needed to
  complete the update.

  Can you fix the postinst script to touch /run/reboot-required?

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