[Bug 1883002] Re: intel-ucode 20200609: hangs on Whiskey Lake

[Launchpad Bug Tracker]

This bug was fixed in the package intel-microcode -
3.20200609.0ubuntu0.20.04.2

---------------
intel-microcode (3.20200609.0ubuntu0.20.04.2) focal-security; urgency=medium

  * REGRESSION UPDATE: revert the tmpfiles snippet to do late
    loading of microcode, this would also happen during package
    upgrades. Also, in the case of a problematic microcode update,
    this would prevent booting using an earlier kernel as the late
    loading would still load the problematic micrcode, forcing the use
    of the 'dis_ucode_ldr' kernel command line option to recover.
    (LP: #1883002)

 -- Steve Beattie <sbeattie at ubuntu.com>  Wed, 10 Jun 2020 13:36:29 -0700

** Changed in: intel-microcode (Ubuntu)
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1883002

Title:
  intel-ucode 20200609: hangs on Whiskey Lake

Status in intel-microcode package in Ubuntu:
  Fix Released

Bug description:
  Basically the same symptoms as #1882809, but with 20.04 and on an
  i7-8665U (Dell Latitude 7300).

  Affected version is 3.20200609.0ubuntu0.20.04.0 (tested with kernels
  5.4.0-33 and 5.4.0-37)

  CPU:
  Vendor ID:                       GenuineIntel
  CPU family:                      6
  Model:                           142
  Model name:                      Intel(R) Core(TM) i7-8665U CPU @ 1.90GHz
  Stepping:                        12

  microcode: sig=0x806ec, pf=0x80, revision=0xca

  The first sign of a problem was a hard lockup while processing the new
  microcode package as part of a larger update; after fixing the
  resulting mess and completing the update (which regenerated the
  initramfs) I started having random lockups early in the boot process,
  with just "Loading initramfs" printed on the console.

  Downgrading intel-microcode to 3.20191115.1ubuntu3 and regenerating
  the initramfs fixes the problem.

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