Intel XTU and ThrottleStop no longer working to undervolt Xeon E-2186m after firmware update

Discussion in 'HP' started by ssupernovae, Jan 3, 2020.

  1. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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    It turns out my EliteBook 840 G6 won't undervolt. Maybe Windows Update nuked it as I did see a few Intel-branded updates installed over the last week.

    Not sure if it's related, but using the InSpectre tool, I can't disable the Spectre protection. Clicking the button does nothing. So maybe that's locked out too. I never tried it until today so I don't know if this was always the case.

    Charles
     
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  2. Spartan@HIDevolution

    Spartan@HIDevolution Company Representative

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    I can't remember the last time the InSpectre tool actually worked. It worked fine when it was first released but with the constant Windows updates it stopped doing anything and I reckon the developer has just given up on it.
     
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  3. hmscott

    hmscott Notebook Nobel Laureate

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    You are probably going to try this already, but if not it would help to know if any of the recent updates can be uninstalled to restore undervolt.

    Also if you can still undervolt in the BIOS before Windows loads - does that BIOS set undervolt persist through boot into Windows even with the new Intel firmware installed by Windows Update.

    Hopefully one or both of those 2 workarounds can restore undervolt.
     
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  4. Papusan

    Papusan TURDBOOKs Sucks! Dont waste your $$$ on FILTHY

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    Have you checked the Intel Microcode version with Hwinfo/Throttlestop? I can't see what Intel branded update that could do this. Not even sure Microsoft have created a new Microcode.

    Edit.
    https://support.microsoft.com/en-us/help/4093836/summary-of-intel-microcode-updates

    Not sure what you use to stop unwanted updates. If you're able to roll back to working state maybe give this tool a try. StopUpdates10 — New tool to stop Windows Updates +++. It will run in the background but maybe still worh a try.

    Or the usual tweaks http://forum.notebookreview.com/threads/the-throttlestop-guide.531329/page-1087#post-10980641
    Have always worked for me. Whatever OS version. Same for bro @Mr. Fox

    I know you have had problems but say it don't work is wrong.

    I'm on Win 10 Enterprise LTSC 2019 (1809) and with latest build. InSpectre works and I got my highest CBR-15 score with it http://forum.notebookreview.com/threads/clevo-overclockers-lounge.788975/page-1868#post-10982545
    upload_2020-1-11_8-33-11.png
     
    Last edited: Jan 11, 2020
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  5. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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  6. hmscott

    hmscott Notebook Nobel Laureate

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    For the Microsoft overlay of Rev. 0xBA that lock only holds true after Windows loads, right? So if your BIOS will allow a negative undervolt you could set it there before entering Windows and after entering Windows no changes could be made, but the BIOS undervolt would still be valid?

    What about replacing the microcode store installed by the MS patch? Or finding the specific patch from Windows Update and uninstalling then blocking that?

    Any other ideas on how to block or reverse this?

    We've already verified it's possible to reverse the voltage locking BIOS update, and revert to the previous BIOS (winflash /nodate if needed) and that reverses the lock on voltage tuning from the BIOS side.
     
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  7. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    I'm so glad that the cancer micro-code has no effect on my desktop's X299 CPU. It's nice having no SGX support whatsoever at the hardware level. It's patched for Plundervolt nonsense, but it hasn't affected it at all.
    5200.JPG
     
  8. martin778

    martin778 Notebook Consultant

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    Would you mind sharing a link? I only see the latest BIOS on the website now.
     
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  9. marckus

    marckus Notebook Enthusiast

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  10. martin778

    martin778 Notebook Consultant

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    Got it! Undervolting is back, now -130mV and 1700pts on the 9880H n Cinebench R15.
     
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