[Bug 1748543] Re: intel-microcode when installed on an i7-6850k based system running Artful breaks overclock

[Robert Dinse]

Unfortunately, the new Microcode did not fix the overclocking issue on
an i7-6850k on an Asus X99A board.  Before and After of /proc/cpuinfo are
attacked as files.

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On Fri, 28 Sep 2018, Henrique de Moraes Holschuh wrote:

> Date: Fri, 28 Sep 2018 17:12:55 -0000
> From: Henrique de Moraes Holschuh <1748543 at bugs.launchpad.net>
> To: nanook at eskimo.com
> Subject: [Bug 1748543] Re: intel-microcode when installed on an i7-6850k based
>      system running Artful breaks overclock
> 
>> From reports elsewhere in the Internet, made by Microsoft Windows users
> with KB4100347 installed. Behavior in Linux might be slightly different.
>
> * Several motherboard vendors affected (at least ASUS, EVGA);
> * Motherboards based on X99 with overclocking features available through vendor UEFI/BIOS;
> * RAM and uncore overclocking not affected by this issue (overclocked values are preserved);
> * CPU voltage not affected (changed voltage set points are preserved).
>
> Processors reported as affected:
> Intel 6800k, 5930k, 6900k, 6950x, Xeon (no data about xeon models, assume socket-compatible with X99 chipset).
>
> Reports imply the microcode update itself is the problem, not the
> updated microcode:  Motherboards whose UEFI/BIOS already has the latest
> microcode revision are *not* affected by this issue, and overclock as
> expected.
>
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1748543
>
> Title:
>  intel-microcode when installed on an i7-6850k based system running
>  Artful breaks overclock
>
> Status in intel-microcode package in Ubuntu:
>  New
>
> Bug description:
>  I have an I7-6850k machine Asus X99-A motherboard, 128GB memory with
>  Artful 17.10 installed.  The official clock speed of this processor is
>  3.6 Ghz, I have it clocked at 4.3 Ghz, however, if I install the
>  intel-microcode package, the machine ignores the BIOS settings and
>  reverts to 3.6 Ghz.  Since this package is necessary from a security
>  perspective I'm stuck with either being insecure or losing an enormous
>  amount of performance.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 17.10
>  Package: intel-microcode (not installed)
>  ProcVersionSignature: Ubuntu 4.13.0-32.35-lowlatency 4.13.13
>  Uname: Linux 4.13.0-32-lowlatency x86_64
>  ApportVersion: 2.20.7-0ubuntu3.7
>  Architecture: amd64
>  CurrentDesktop: MATE
>  Date: Fri Feb  9 13:04:14 2018
>  InstallationDate: Installed on 2017-05-05 (280 days ago)
>  InstallationMedia: Ubuntu-MATE 17.04 "Zesty Zapus" - Release amd64 (20170412)
>  SourcePackage: intel-microcode
>  UpgradeStatus: Upgraded to artful on 2017-10-20 (112 days ago)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1748543/+subscriptions
>

** Attachment added: "cpuinfo.before"
   https://bugs.launchpad.net/bugs/1748543/+attachment/5194659/+files/cpuinfo.before

** Attachment added: "cpuinfo.after"
   https://bugs.launchpad.net/bugs/1748543/+attachment/5194660/+files/cpuinfo.after

-- 
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Foundations Bugs, which is subscribed to intel-microcode in Ubuntu.
https://bugs.launchpad.net/bugs/1748543

Title:
  intel-microcode when installed on an i7-6850k based system running
  Artful breaks overclock

Status in intel-microcode package in Ubuntu:
  New

Bug description:
  I have an I7-6850k machine Asus X99-A motherboard, 128GB memory with
  Artful 17.10 installed.  The official clock speed of this processor is
  3.6 Ghz, I have it clocked at 4.3 Ghz, however, if I install the
  intel-microcode package, the machine ignores the BIOS settings and
  reverts to 3.6 Ghz.  Since this package is necessary from a security
  perspective I'm stuck with either being insecure or losing an enormous
  amount of performance.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: intel-microcode (not installed)
  ProcVersionSignature: Ubuntu 4.13.0-32.35-lowlatency 4.13.13
  Uname: Linux 4.13.0-32-lowlatency x86_64
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Fri Feb  9 13:04:14 2018
  InstallationDate: Installed on 2017-05-05 (280 days ago)
  InstallationMedia: Ubuntu-MATE 17.04 "Zesty Zapus" - Release amd64 (20170412)
  SourcePackage: intel-microcode
  UpgradeStatus: Upgraded to artful on 2017-10-20 (112 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1748543/+subscriptions