English Community

ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
All Forum Topics
Options

2 Posts

02-08-2018

US

5 Signins

38 Page Views

  • Posts: 2
  • Registered: ‎02-08-2018
  • Location: US
  • Views: 38
  • Message 1 of 3

How to rollback withdrawn BIOS (CPU Microcode) Update?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.

Reply
Options

632 Posts

12-30-2017

PL

1418 Signins

16129 Page Views

  • Posts: 632
  • Registered: ‎12-30-2017
  • Location: PL
  • Views: 16129
  • Message 2 of 3

Re: How to rollback withdrawn BIOS (CPU Microcode) Update?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.

------
...
Reply
Options

405 Posts

03-03-2017

JP

1375 Signins

12403 Page Views

  • Posts: 405
  • Registered: ‎03-03-2017
  • Location: JP
  • Views: 12403
  • Message 3 of 3

Re: How to rollback withdrawn BIOS (CPU Microcode) Update?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

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete