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

[Rex Tsai]

** Tags added: breckenridge-mlk-cfl oem-priority somerville

** Also affects: oem-priority
   Importance: Undecided
       Status: New

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

Status in OEM Priority Project:
  New
Status in intel-microcode package in Ubuntu:
  Confirmed

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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