[Bug 1882943] Re: Boot freezes silently after 'intel-microcode' upgrade

[Steve Beattie]

This is on Ubuntu 20.04 LTS/focal, correct?

If so, this is either exacerbated or triggered entirely because focal's
intel-microcode package enabled late loading of microcode (known to be
risky) that would get triggered while updating the intel-microcode
package itself; see LP: #1883002. Even worse, it would get triggered
even if you booted with an earliuer

A regression update for focal's intel-microcode package
(3.20200609.0ubuntu0.20.04.2) has been published,
https://usn.ubuntu.com/4385-2. Can you test with that version to see if
your processor still has problems with the updated
3.20200609.0ubuntu0.20.04.2 version?

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https://bugs.launchpad.net/bugs/1882943

Title:
  Boot freezes silently after 'intel-microcode' upgrade

Status in intel-microcode package in Ubuntu:
  New

Bug description:
  1) # apt dist-upgrade froze suddenly,
  2) and Ubuntu's boot sequence had frozen completely, silently (no warnings nor errors even in debug mode!!) and permanently,
  3) after many trials  to recover the system,
  4) I added 'dis_ucode_ldr' boot option to Grub2/Ubuntu configuration,
  5) and hurray, the system booted finally :)

  There must be something wrong with:
  a) CPU firmware
  b) intel-microcode package

  Dell Latitude 5591, Intel Core i7-8850H

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