MarcLaflamme
2 Bronze

WHEA-Logger Processor Core Internal Parity Error on 9020

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  • OptiPlex 9020
  • Core i7 4790
  • Windows 10 Pro

It seems that ever since the BIOS update and patches were installed for Meltdown/Spectre, I've been getting continuous WHEA-Logger events.

A corrected hardware error has occurred.

Reported by component: Processor Core

Error Source: Corrected Machine Check

Error Type: Internal parity error

Processor APIC ID: # (this number changes)

Is there any incompatibilities with the latest BIOS and the OS patches that might cause this or is my CPU slowly dying? I ran the Intel Processor Diagnostic Tool but everything passed.

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Marc-CED
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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Same Issue.  Dell Precision Workstations.  All 10 of them.  Blue Screen on one.

Cause:  Microsoft Meltdown and Spectre Mitigations 

Here is the Workaround - 

First make a Windows System Restore Point.
https://www.computerhope.com/issues/ch001334.htm

Run this script (as administrator) to disable the Meltdown and Spectre Mitigations by Microsoft - reboot required.  Save as a .bat  file:
https://www.manageengine.com/products/desktop-central/script-templates/others/disable-mitigations-fo...

First Determinate if you are at risk if you disable the mitigations.  Opinion:  The risk is very low for the vast majority of users.
https://www.networkworld.com/article/3245813/security/meltdown-and-spectre-exploits-cutting-through-...

Also determine if you only need to disable only one of the two mitigations:
https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/KB4056892-multiple-problems-on-T440s/m-p...

0 = Both CVE-2017-5715 and CVE-2017-5754 enabled (WHEA Errors)
1 = CVE-2017-5754 Enabled Only (No WHEA Errors)
2 = CVE-2017-5715 Enabled Only (WHEA Errors)
3 =  Both Disabled (No WHEA Errors)

Note:  I have not yet tested downgrading the bios and leaving the Microsoft mitigation enabled.

To Turn it Back On, see:  https://support.microsoft.com/en-us/help/4072698/windows-server-guidance-to-protect-against-the-spec...

Also Read Carefully: https://support.microsoft.com/en-us/help/4072699/january-3-2018-windows-security-updates-and-antivir...
-----------------------

Intel says new firmware patches trigger reboots in Haswell and Broadwell systems:
https://www.computerworld.com/article/3247788/computer-hardware/intel-says-new-firmware-patches-trig...

Issue:  Thousands of Event ID 19 -  random blue screens.

Event ID 19      WHEA-Logger
A corrected hardware error has occurred.
Reported by component: Processor Core
Error Source: Corrected Machine Check
Error Type: Internal parity error
Processor APIC ID: 0

-------------------

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18 Replies
fireberd
8 Krypton

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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A CPU hardware error is very possible.  I had a "WHEA" error that kept coming up on an Intel CPU (i7 3770) and it passed all hardware tests, including the Intel CPU test.  I do some PC support and repair and had spare parts.  I swapped everything except the CPU and still had the problem.  I didn't have another spare i7 3770 but I had an i5 3550 and installed that and no more problems.  I sent the i7 to Intel for warranty service and they sent a replacement i7 and I installed that.  

However, a BIOS error can also cause this. Clear the CMOS (BIOS) memory (with the PC powered off) by opening the case and removing the CR2032 CMOS Memory backup battery for AT LEAST 10 minutes.  Replace the battery and power on. If there were any customized BIOS settings they will have to be re-entered.  

Aside from the possibility of a CPU hardware problem, see this from Microsoft

https://social.technet.microsoft.com/wiki/contents/articles/3567.event-id-18-microsoft-windows-whea-...



I am not a Dell Employee

Dell forum member since 2002

Dell Inspiron 15 - 5577 Laptop

Home Built Desktop PC with Gigabyte Designare Z390,  i7 8700K CPU

Windows 10 64 bit Pro and Windows 10 Insider Program Beta Versions. SSD drives. Cakewalk by BandLab and Studio One 4.6 Pro Recordng Studio Software.

Dell S2719DGF Monitor

Member of Nashville based R.O.P.E.

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MarcLaflamme
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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Thanks I'll give your suggestions a try.

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Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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We have encountered the same issues with several OptiPlex 7020 systems. I have not yet tested the solutions on them.

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Marc-CED
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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Same Issue.  Dell Precision Workstations.  All 10 of them.  Blue Screen on one.

Cause:  Microsoft Meltdown and Spectre Mitigations 

Here is the Workaround - 

First make a Windows System Restore Point.
https://www.computerhope.com/issues/ch001334.htm

Run this script (as administrator) to disable the Meltdown and Spectre Mitigations by Microsoft - reboot required.  Save as a .bat  file:
https://www.manageengine.com/products/desktop-central/script-templates/others/disable-mitigations-fo...

First Determinate if you are at risk if you disable the mitigations.  Opinion:  The risk is very low for the vast majority of users.
https://www.networkworld.com/article/3245813/security/meltdown-and-spectre-exploits-cutting-through-...

Also determine if you only need to disable only one of the two mitigations:
https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/KB4056892-multiple-problems-on-T440s/m-p...

0 = Both CVE-2017-5715 and CVE-2017-5754 enabled (WHEA Errors)
1 = CVE-2017-5754 Enabled Only (No WHEA Errors)
2 = CVE-2017-5715 Enabled Only (WHEA Errors)
3 =  Both Disabled (No WHEA Errors)

Note:  I have not yet tested downgrading the bios and leaving the Microsoft mitigation enabled.

To Turn it Back On, see:  https://support.microsoft.com/en-us/help/4072698/windows-server-guidance-to-protect-against-the-spec...

Also Read Carefully: https://support.microsoft.com/en-us/help/4072699/january-3-2018-windows-security-updates-and-antivir...
-----------------------

Intel says new firmware patches trigger reboots in Haswell and Broadwell systems:
https://www.computerworld.com/article/3247788/computer-hardware/intel-says-new-firmware-patches-trig...

Issue:  Thousands of Event ID 19 -  random blue screens.

Event ID 19      WHEA-Logger
A corrected hardware error has occurred.
Reported by component: Processor Core
Error Source: Corrected Machine Check
Error Type: Internal parity error
Processor APIC ID: 0

-------------------

View solution in original post

MarcLaflamme
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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Thank you so much for this information! It was a little harder to find because I was restricting my searches to Dell yet these issues are happening on all other vendors systems.

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Brent C
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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Does this workaround also apply to the Optiplex 9020M?

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Marc-CED
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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The workaround applies to all computers and servers running Windows that are still being supported by Microsoft.

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Brent C
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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I can confirm that the solution has solved the problem on my 9020M.

Kudos to Marc-CED for this solution.  Many thanks.

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jamie4361
2 Bronze

Re: WHEA-Logger Processor Core Internal Parity Error on 9020

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Many thanks Marc-CED

This solution also worked for Precision M4800.

 

 

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