01-20-2018 11:25 AM
Sadly I installed the [now withdrawn] GRET54WW (1.31 ) BIOS update which patched the Spectre vulnerability on my X1 Carbon 20A7 model a couple of weeks ago. I've since been experiencing spurious reboots when coming out of sleep and random BSODs --- which are obviously the reasons for the update being withdrawn.
Is there a way to downgrade the BIOS to a prior level? Not sure that I can live with this until 3/31/2018!
01-21-2018 05:37 AM
[Messaged moved to Security & Malware board for visiblity. AG]
01-21-2018 05:42 AM - edited 01-21-2018 05:44 AM
All previous UEFI BIOS Firmware versions are available for download towards the bottom of this page:
Name: BIOS Update Utility for Windows 10 (64-bit), 8.1 (64-bit), 8 (64-bit), 7 (32-bit, 64-bit) - ThinkPad X1 Carbon (Type 20A7, 20A8)
I'd suggest going back to v1.30, the immediately previous version, and see if that resolves your issues.
01-22-2018 01:59 PM
According to https://support.lenovo.com/us/en/solutions/len-18282, look at the revision history subsection. Revision #10 indicates that microcode updates are not reversable, so if you've updated your microcode and you're experiencing system stability issues and you're running Windows, you can try disabling one of the Microsoft patches for CVE-2017-5715 if you're seeing WHEA errors in Event Viewer.
Follow the steps listed here https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/KB4056892-multiple-problems-on-T440s/m-p...
06-22-2018 06:52 AM
Same problem here. I just bought the Carbon X1 6th gen maxxed out. After initial setup of W10 everything was cool and quiet, even when watching 4K on Youtube. Then I installed the latest recommended Lenovo Updates including the Spectre side channel BIOS upgrade and the fan spins fast and goes rarely silent. I will now try out Linux and report back here.