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SandyR
Fanfold Paper
Posts: 1
Registered: ‎11-23-2016
Location: CA
Views: 509
Message 1 of 3

BIOS Update Error with X1 Carbon type 20A7

I attempted to update the BIOS on my X1 Carbon type 20A7 using the bootable CD option.

The previous bios was 1.09 and I tried to update to 1.26 (file gruj23us.iso).

Booting from a USB gave me the error:

 

ASSERT c:\edk2\MdePkg\Library\BaseLib\String.c(166): String != ((void *) 0)

 

and then the update froze. The machine will no longer boot from the hard drive. However, it will still boot from USB.  Is there any way to get a working BIOS back on this machine? Has anyone else seen this error when doing a BIOS update?

 

ThorsHammer
Bit Torrent
Posts: 2,423
Registered: ‎04-08-2011
Location: US
Views: 446
Message 2 of 3

Re: BIOS Update Error with X1 Carbon type 20A7

Is it under warranty?

Lenovo Employee 1337h4x
Lenovo Employee
Posts: 61
Registered: ‎12-05-2016
Location: US
Views: 313
Message 3 of 3

Re: BIOS Update Error with X1 Carbon type 20A7

F1 (EFI setup) -> Boot Options -> Change boot mode to "Legacy" -> F11 to exit saving changes This should fix that error.

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