[Bug 1759920] Re: intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-image-4.13.0-37-generic)

[Gordon Lack]

For me, on my laptop (Intel(R) Core(TM) i5-4330M CPU @ 2.80GHz) with Kubuntu 17.10, the 4.13.0-38-generic kernel (signed image) has the same problem.
In fact it was slightly worse, a it seems to have wiped out my Ubuntu UEFI booting (boots straight to Windows - I can get to the Ubuntu menu from there and that works).
Now fixing that...

Reverting to the older intel-microcode with 4.13.0-38-generic is OK.

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https://bugs.launchpad.net/bugs/1759920

Title:
  intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
  image-4.13.0-37-generic)

Status in intel-microcode package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed
Status in intel-microcode source package in Artful:
  Confirmed
Status in linux source package in Artful:
  Confirmed

Bug description:
  I don't know if this is a problem with the kernel or the microcode,
  but we have a significant number of computers in our organization (on
  both 16.04 and 17.10) that fail if they have both updated.  Booting
  with either linux-image-4.13.0-36-generic or intel-microcode
  3.20180108.0+really20170707ubuntu17.10.1 allows all these computers to
  boot.

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