[Bug 1882914] Re: Thinkpad T460S won't boot with latest intel-microcode update

[Steve Beattie]

Thanks!

I have packages that revert the problematic microcode back to the
version included in the microcode updates from 20191115 available for
testing in https://launchpad.net/~sbeattie/+archive/ubuntu/lp1882890/ ;
can you confirm that after installing them from that ppa, that you can
successfully reboot your system?

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https://bugs.launchpad.net/bugs/1882914

Title:
  Thinkpad T460S won't boot with latest intel-microcode update

Status in intel-microcode package in Ubuntu:
  New

Bug description:
  This morning I installed the security update "3.20200609.0ubuntu0.20.04.0" of intel microcode and then, after rebooting, my T460S laptop is stuck with the "loading initial ramdisk" message.
  Selecting an older kernel did not help.

  What I had to do to recover is boot on a live session, chroot into my
  system, rollback to intel-microcode version "3.20191115.1ubuntu3" then
  regenerating initramfs.

  Then I was able to reboot normally.

  Note that my BIOS/firmware is up-to-date (according to "fwupdmgr
  update").

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: intel-microcode 3.20191115.1ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
  Uname: Linux 5.4.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jun 10 11:12:04 2020
  InstallationDate: Installed on 2017-03-23 (1174 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: intel-microcode
  UpgradeStatus: Upgraded to focal on 2020-04-30 (40 days ago)

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