[Bug 1742933] Re: Regression in 2018-01-08 updates

[Steve Langasek]

On Mon, Feb 05, 2018 at 11:03:00AM -0000, Thomas wrote:
> The microcode file found in 3.20180108.0+really20170707ubuntu16.04.1 for
> my Haswell CPU still causes problem that I haven't had before.

> When booting the kernel, it cannot find any partitions. Funiliy, the
> initrd file contains nothing but the microcode file. Reverting manually
> to a known-good initrd file (also containing nothing but the microcode
> file) fixes it.

The initrd file is a concatenation of two archives, one of which is the
microcode only, the other contains the normal initrd contents.

It is exceedingly unlikely that the problem you're experiencing is in any
way connected to a microcode update.

You can introspect the initrd on disk with the command:

  (cpio -t; zcat | cpio -t) < /boot/initrd.img

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https://bugs.launchpad.net/bugs/1742933

Title:
  Regression in 2018-01-08 updates

Status in intel-microcode package in Ubuntu:
  Confirmed
Status in intel-microcode source package in Trusty:
  Fix Released
Status in intel-microcode source package in Xenial:
  Fix Released
Status in intel-microcode source package in Zesty:
  Won't Fix
Status in intel-microcode source package in Artful:
  Fix Released
Status in intel-microcode source package in Bionic:
  Confirmed
Status in intel-microcode package in Debian:
  Fix Released

Bug description:
  There is a regression in the Intel 20180108 microcode updates that is
  causing issues for some devices:

  https://newsroom.intel.com/news/intel-security-issue-update-
  addressing-reboot-issues/

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