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02-01-2018

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Re: KB4056892 multiple problems on T440s

2018-02-01, 23:30 PM

Just to chip in, I've got a T460S and happened to update to BIOS 1.30 and also installed patch KB4056892. I was plagued with several BSOD's, all related to ntoskrnl.exe. Sometimes after an hour, sometimes every few minutes. Did all the usual hardware checks, RAM + Disk came back fine.

 

Thank God I came across this post. I've uninstalled KB4056892 and been purring like a kitten for ages now.

 

I've suspended Windows from updating for 35 days, hopefully that will give them enough time to get their act together. Wasted hours of my life trying to fix it :(

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02-15-2018

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Re: KB4056892 multiple problems on T440s

2018-02-15, 17:09 PM

Pardon our ignorance... but how do you uninstall a BIOS update?  I'm having the same BSOD problem, ever since installing that update a couple of months ago.

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02-01-2018

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Re: KB4056892 multiple problems on T440s

2018-02-15, 17:47 PM

I just downloaded the 1.28 version and applied it.

 

https://download.lenovo.com/pccbbs/mobiles/n1cuj17w.exe

 

Still seems to be ok so far!

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12-06-2015

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Re: KB4056892 multiple problems on T440s

2018-02-15, 17:59 PM

Urbie,

You can't uninstall the BIOS update as that is a firmware update that is written to a chip on the system board and it is not an update that ends up on the hard drive. So you are stuck with it. Other people may have suggested to download and instlall a prior version of the BIOS. Well be careful with that advice because some older BIOS versions being recommended are actually not for the T440s but for other Lenovo models that are also affected. And although other Lenovo models may allows for rolling back to a prior BIOS firmware I believe that on the T440s in this particular instance you can not go back to a prior BIOS version.

 

Here are your 2 options:

 

A) Uninstall KB4056892 by going to Control Panel and under Programs and Features look for Installed Updates link, or you can look for Programs and Features in the Settings menu under Apps. But once you end up at Installed Updates list you might notice that KB4056892 may not be listed. That is because if you have waited too long there are other updates that superseed and then make it so that you can't uninstall KB4056892. Even if you can uninstall KB4056892 you will have to then block Windows from pulling it down automatically and installing it again by disabling updates temprarily. I say temporarily because in Windows 10's Settings you can only disable automatic updates for a short while. This pausing is done under Settings, Windows Updates, and then selecting Advanced Options. So this uninstalling KB4056892 is a bad option.

 

B) This is the best option but it will require to you to revisit these changes in the future to turn things back to normal once a future Lenovo BIOS update becomes available. What you do is open Regedit and edit the Windows Registry. You'll need to edit the following keys:

 

"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management"
add:
DWORD named FeatureSettingsOverride and set its value to 3

DWORD named FeatureSettingsOverrideMask and set its value to 3

 

When a future BIOS update comes out from Lenovo that fixes this problem then you'll want to edit these registry keys and set both values to 0 or else your computer will not have the Windows 10 fixes to help mitigate for Meltdown and Spectre. So essentially for now yes by editing the registry you are disabling the Meltdown and Spectre mititagion fixes. But there is nothing else you can do. I suppose another thing you could do is live with the slowdown, and live with the filled Event Veiwer, and live with the BSOD.  Or put this particular computer asside and use a different computer till this gets a proper fix.

 

 

 

 

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02-15-2018

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Re: KB4056892 multiple problems on T440s

2018-02-16, 14:48 PM
Thanks for the help! I'm not messing with regedit, though -- this is my work machine, so I'm just going to save my work maniacally, live with the BSOD problem until Lenovo fixes it (if they ever do), and otherwise be glad I use a Mac on my own time!
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01-28-2018

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Re: KB4056892 multiple problems on T440s

2018-02-16, 18:26 PM

You can install kb4078130 to deactivate Spectre Patch

https://www.ghacks.net/2018/01/29/windows-update-kb4078130-deactivates-spectre-patch/

https://www.catalog.update.microsoft.com/Search.aspx?q=KB4078130

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01-11-2018

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  • Message 37 of 56

Re: KB4056892 multiple problems on T440s

2018-02-17, 11:01 AM

wrote:

You can install kb4078130 to deactivate Spectre Patch

https://www.ghacks.net/2018/01/29/windows-update-kb4078130-deactivates-spectre-patch/

https://www.catalog.update.microsoft.com/Search.aspx?q=KB4078130


This patch doesn't seem to work on all systems, certainly not on my T440s (and in light of hundreds of complaints re this patch, I assume I'm not alone) - no reaction whatsoever. Therefore, the only solution so far which worked for me was to manually add the registry keys as suggested which hushed the WHEA-Logger successfully. This is allegedly the only thing what that KB4078130 patch seems to do anyhow.

 

BTW, I had blocked Windows updates until last night. The update service installed a series of recent updates, but - surprise - gave me a 0x800f081f error on the crappy KB40568982. However, my joy of seeing that didn't last when I saw that despite the failure to install said update the WHEA-Logger ran wild again, only to be blocked by the registry changes mentioned.
 

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02-08-2011

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Re: KB4056892 multiple problems on T440s

2018-02-18, 0:29 AM

A few points to add:

  • Disabling the Spectre CVE 5715 is most easily done with GRC's InSpectre utility. One button click; no manual registry editing.
  • Part of what is in a BIOS update is CPU microcode. (The microcode update is what Intel messed up recently.) You can downgrade your BIOS *, BUT the older microcode might not get applied the way you might expect. See this post.

* Some BIOS versions prevent going back to an older ones for security reasons. See the readme file for your BIOS update

 

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11-27-2015

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Re: KB4056892 multiple problems on T440s

2018-03-05, 17:26 PM

Thanks galfert. Same issue - just adding the 2 registry entries and I hope this will stop the crashs. Has anyone heard if Lenovo is working on a fix?

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12-06-2015

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Re: KB4056892 multiple problems on T440s

2018-03-09, 14:41 PM

*** !!!!  Finally !!!! ****

Lenovo has released a new firmware version 2.47 for the T440s.

 

Readme notes for new BIOS firmware version 2.47 says that it fixes Spectre (CVE-2017-5715)

 

CHANGES IN THIS RELEASE
  Version 2.47

[Important updates]
- Enhancement to address CVE-2017-5715

 I have not yet attempted to install this new version just released.

 

- This new version does not yet show up in Lenovo Vantage update utility nor Thinkvantage System Update..etc. You must download and install it manually. I'm sure it will show up soon.

 

- Here is the link to manually download the new BIOS 2.47

https://pcsupport.lenovo.com/uu/en/downloads/DS035965

 

**** IMPORTANT ****

If you have previously modified your Registry to stop problems with version 2.46 then you need to revert those changes. Just deleting the registry keys that you added will not fix the problem. You need to keep the new keys you added to the registry and then just change the values from 3 to 0 . If you did not modify the registry previously you don't need to worry, just update to version 2.47 and you are all set.

 

Edit Registry to this after installing BIOS 2.47 (this enables back the Spectre and Meltdown protection in Windows):

 

"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management"
add:
DWORD named FeatureSettingsOverride and set its value to 0

DWORD named FeatureSettingsOverrideMask and set its value to 0

 

I'll report back soon after I do this update and let you all know if the slowdowns and Windows log WHEA errors persist or not.

 

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