[Bug 1760264] Re: New version of intel-microcode freezes computer

[Michael Mauch]

Here's a serial log made with picocom and script on a Raspberry Pi.

It contains the end of a shutdown, a boot with the microcode loader
active (search for " 0.0000" to find the start of the boot, or "Tainted"
to get to the error), and a successful boot with dis_ucode_ldr.

I know that tainted kernels make maintainers unhappy. I need these
modules for my DVB card. If that log is useful at all, I could make a
log with an original kernel.

** Attachment added: "Serial log of two boots - one with microcode, one with dis_ucode_ldr"
   https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1760264/+attachment/5098783/+files/viscacha.log

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https://bugs.launchpad.net/bugs/1760264

Title:
  New version of intel-microcode freezes computer

Status in intel-microcode package in Ubuntu:
  Confirmed

Bug description:
  The problem appears on 3.20180312.0~ubuntu17.10.1 version. System
  freeze completely on login screen. Can't move mouse and switch to
  virtual console. After downgrade to 3.20170707.1 made in recovery mode
  everything back to normal. I have Intel Core i7-4700HQ.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: intel-microcode 3.20170707.1
  ProcVersionSignature: Ubuntu 4.13.0-37.42-lowlatency 4.13.13
  Uname: Linux 4.13.0-37-lowlatency x86_64
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  Date: Sat Mar 31 06:26:06 2018
  InstallationDate: Installed on 2015-02-13 (1141 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: intel-microcode
  UpgradeStatus: Upgraded to artful on 2017-10-20 (161 days ago)

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