[Bug 1882943] Re: Dell Latitude 5591, i7-8850H, sig=0x906ea/20200609, Boot freezes silently after 'intel-microcode' upgrade

[You-Sheng Yang]

** Summary changed:

- Boot freezes silently after 'intel-microcode' upgrade
+ Dell Latitude 5591, i7-8850H, sig=0x906ea/20200609, Boot freezes silently after 'intel-microcode' upgrade

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

Title:
  Dell Latitude 5591, i7-8850H, sig=0x906ea/20200609, 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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