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2 Posts

02-08-2018

United States of America

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How to rollback withdrawn BIOS (CPU Microcode) Update? - T550 BIOS 1.19

2018-02-08, 14:17 PM

I have installed the "pulled" BIOS update for Spectre/Meltdown, and now have significant stability issues. There are no instructions on this page of how to rollback this update: https://support.lenovo.com/us/en/solutions/len-18282

 

In this situation, does Lenovo advise re-installing an older BIOS? Or is there a solution coming very soon? It's been several week without any updates.

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635 Posts

12-30-2017

Poland

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Re: How to rollback withdrawn BIOS (CPU Microcode) Update? - T550 BIOS 1.19

2018-02-08, 15:04 PM

Downgrade to older BIOS version will not help, as installer won't be able to downgrade CPU microcode. Currently Lenovo and Intel are working to provide a solution which allow downgrade to previous microcode. They have adviced to wait till downgrade method will be developed. But... you can do something to restore stability of your system. It was found, that stability issues are present, when OS is using fixes against meltdown/spectre. Actually, you can disable them. Below you'll find a guide:

https://winaero.com/blog/disable-meltdown-fix-amd-cpus-installing-kb4056892/

 

Personally, I've tested it on few devices and stablility issues were no longer present.

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419 Posts

03-03-2017

Japan

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Re: How to rollback withdrawn BIOS (CPU Microcode) Update? - T550 BIOS 1.19

2018-02-09, 8:22 AM

(contents removed due to inadequate description)

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