Have a X1 Carbon 2nd 20A7 with BIOS v1.40. Tried rolling back to a previous bios version (1.39) and keep getting "Secure flash authentication error" message.
Searching the forums I came across a post stating to disable Secure Rollback Prevention in the BIOS.
I have already tried that and still got the same BIOS flash error. Also tried the BIOS update ISO, this is also throwing the same error.
The BIOS readme for v1.40 states that downgrading is possible. I suspect however that this may be an oversight by Lenovo since the ECP version on bios 1.40 is 1.20 and BIOS v1.39 contains ECP v1.19.
Is there another method to force flash to a lower BIOS version?
Already reset the BIOS to defaults, also tried the /sd switch running from elevated command prompt.
Reason I want to flash to a lower BIOS version is because I am experiencing major throttling issues which were not occuring with BIOS v1.39. Flashed v1.40 and immediately performance is noticably lower. Exhaust and fan is clean. Fresh thermal paste. At idle i get temps in the 32 to 38 range. Fresh install of Windows 10 x64 21H1 (tried 2004 and 1909 build as well). All drivers updated, etc. Throttling is an issue when running apps like Skype, Word, Outlook and just horrible when watching YouTube on Chrome or Firefox. This did not happen before with BIOS v1.39.
SSD is fine (even swapped out with another) RAM tested good.
It would be a waste not to be able to use this X1 Carbon 2nd with an i7-4600u, 8gb RAM. Still runs great, just not with BIOS v1.40.
- Admin Emeritus
- Posts: 22593
- Joined: Mon Sep 18, 2006 5:17 am
- Location: Wexford, Éire
https://pcsupport.lenovo.com/us/en/prod ... s/ds039782
Rather than trying this from inside that gawdawful W10, I recommend using a USB external CD/DVD burner and making a bootable CD, using the above ISO downloads and a burner program like ImgBurn.
If that still doesn't work, you may need an SPI flash programmer, such as the CH341A and a SOIC8 cable.
There is ample info on the web and Youtube on how to do this.
Covid-19: Stay safe, so still Mask it or Casket!
Was looking at the SPI programmer option as a last resort. Don't want to risk bricking the unit.
On that note, I'm curious if there is a crisis BIOS recovery method for this model. I could not find any info for this model in regards to a BIOS recovery procedure.
I'm experiencing the very same problems with my 2nd gen x1 carbon since the BIOS update v1.40 and did not find any way to downgrade to a previous version. It's a shame that Lenovo releases an update with such problems. As soon as I try to watch videos with higher resolutions (like 4k clips on youtube) the video starts stuttering. It's nearly impossible to share my screen on online meeting tools like zoom anymore because of performance issues.
Did you have any luck downgrading your BIOS version? If yes, how did you achieve that?
Please fix these issues with another update or provide a way to downgrade to a previous version.
- Similar Topics
- Last post
X1 Carbon Gen 9 vs X13 Gen 2 keyboard?
Last post by dr_st « Thu Dec 02, 2021 1:13 pmReplies: 11
Posted in ThinkPad X1 / X1-Carbon / X1-Extreme and later Seriesby Edward Mendelson » Sun Nov 28, 2021 6:03 pm » in ThinkPad X1 / X1-Carbon / X1-Extreme and later Series
- 11 Replies
- 978 Views
Last post by dr_st
Thu Dec 02, 2021 1:13 pm
X1 Carbon Gen 3 BIOS locked
Last post by RealBlackStuff « Sun Nov 21, 2021 4:26 amReplies: 2
Posted in ThinkPad X1 / X1-Carbon / X1-Extreme and later Seriesby randoomkiller » Thu Nov 18, 2021 3:45 pm » in ThinkPad X1 / X1-Carbon / X1-Extreme and later Series
- 2 Replies
- 587 Views
Last post by RealBlackStuff
Sun Nov 21, 2021 4:26 am
X1 Carbon Gen 8 can't change charge levels via TLP 1.3.1 in Ubuntu 20.04
Last post by eggrevolver « Mon Aug 30, 2021 5:40 amReplies: 1
Posted in ThinkPad X1 / X1-Carbon / X1-Extreme and later Seriesby eggrevolver » Sat Aug 28, 2021 5:32 am » in ThinkPad X1 / X1-Carbon / X1-Extreme and later Series
- 1 Replies
- 1771 Views
Last post by eggrevolver
Mon Aug 30, 2021 5:40 am
X1 Carbon 7h Gen dead monitor: LCD/Touch replacement
Last post by randoomkiller « Thu Nov 18, 2021 6:05 pmReplies: 3
Posted in ThinkPad X1 / X1-Carbon / X1-Extreme and later Seriesby robca » Sat Sep 04, 2021 1:15 pm » in ThinkPad X1 / X1-Carbon / X1-Extreme and later Series
- 3 Replies
- 1520 Views
Last post by randoomkiller
Thu Nov 18, 2021 6:05 pm
Who is online
Users browsing this forum: No registered users and 9 guests