01-16-2018 04:16 PM - edited 01-17-2018 06:11 AM
Here is a summary of where we stand, since this thread is diverging from the unresolved critical issue originally posted.
Issue: On a T440s, KB4056892 with the latest BIOS (2.46) causes a stream of WHEA-Logger errors that report CPU-level parity errors and in some cases system lockups.
Workaround: In message 15 CrypticLottery reports how to disable a subset of the CPU flaw mitigations to prevent errors and crashes.
Status: Lenovo has
not included the problematic BIOS 2.46 in the microcode updates that have been withdrawn (see message 18) so it is not known if they are working on it.
01/17: Edited to reflect update to Lenovo bulletin where it now says "Earlier update GJET96WW withdrawn by Intel Target availability 3/31/2018"
01-23-2018 05:05 AM
Good summary by @ianw01
Just to note the issue also applies to 2.44 which hasn't been pulled and I downgraded to. The WHEA events continue until @CrypticLottery workaround to registry values is applied
01-23-2018 05:51 AM
I believe that 2.44 is fine - the issue is that you downgraded from 2.46. Although there is microcode bundled in the BIOS update, whether it is actually used is more complicated than that - according to this post in another board.
01-28-2018 05:10 AM
Same here. Two STOP ERRORS on my T440 and Windows 10. First IRQ_NOT_LESS_OR_EQUAL and second was System Service Exception (ntoskrnl.exe). Before KB4056892/BIOS update this computer has been working for years without any problem
02-01-2018 09:17 AM - edited 02-01-2018 09:21 AM
Interestingly I have two T440s with BIOS 2.46 and KB4056892 installed.
One system experienced a lot of momentary freezing and locking up, but no BSOD.
The other system seems fine.
They both have full Event Viewer logs with WHEA-Logger entries.
Strange that it seems to be a problem on one and not the other.
I've editing the registry on the one that was freezing but let things alone on the other T440s. Very strange.
Both have Windows 10 Pro and Office 16 32bit with 8GB RAM and 256 SSD.
Someone please let us know when this issue is permanently resolved with new BIOS or whatever.
02-01-2018 09:43 AM - edited 02-01-2018 09:46 AM
> One system experienced a lot of momentary freezing and locking up, but no BSOD.
BSOD occurs only under heavy load, when there are many running programs that use the system in different ways (ex. HDD+CPU+GPU intensive). Otherwise only momentary freezing happens.
02-01-2018 03:30 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