[Bug 1883016] Re: revert tmpfiles.d loading of microcode

[Steve Beattie]

This was fixed in 3.20200609.0ubuntu0.20.04.2 in focal and groovy
(thanks for the forward copy!). The eoan patch to add tmpfiles.d late
loading never made it out of eoan-proposed.

Closing all tasks. Thanks!

** Changed in: intel-microcode (Ubuntu Focal)
       Status: In Progress => Fix Released

** Changed in: intel-microcode (Ubuntu Groovy)
       Status: In Progress => Fix Released

** Changed in: intel-microcode (Ubuntu Eoan)
       Status: In Progress => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to intel-microcode in Ubuntu.
https://bugs.launchpad.net/bugs/1883016

Title:
  revert tmpfiles.d loading of microcode

Status in intel-microcode package in Ubuntu:
  Fix Released
Status in intel-microcode source package in Eoan:
  Invalid
Status in intel-microcode source package in Focal:
  Fix Released
Status in intel-microcode source package in Groovy:
  Fix Released

Bug description:
  [Impact]

  revert tmpfiles.d loading of microcode

  Sometimes, despite intensive testing bad microcode can be shipped.

  When bad microcode is shipped and it is attempted to be loaded at
  package configuration time, system will end up in inconsistent state.
  Specifically apt transaction is aborted, new microcode is unpacked on
  disk but dpkg database is in inconsistent state.

  Thus whilst it was meant to be a canary, it wasn't a good one. Also it
  applies on initrd-less boot, initrd-full boot, early initrd and
  package upgrades. Which is not the right design here.

  Ideally, installing microcode update would generate a one time boot
  option to try new microcode, if successful commit booting with it.
  Otherwise fallback to previous version of the microcode. None of that
  is solvable with tmpfiles however.

  Most recent examples is the Skylake regression on 0x000406e3 systems

  https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1882890
  https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1883002

  [Test Case]

   * downgrade to old intel-microcode package
   * reboot
   * upgrade to new intel-microcode package
   * observe that uncoordinate microcode update is not attempted at package configuration time

  [Regression Potential]

   * This is a revert

  [Other Info]
   
   * microcode try, commit or revert would be nice to implement.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1883016/+subscriptions