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2 Posts

08-20-2019

CA

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GUID typo in X1 Carbon/Yoga 4th/1st gen ECP linux firmware update (n1ful37w.zip)

2019-08-20, 19:04 PM

The linux version of the latest BIOS/ECP firmware (1.44/1.18) for the X1 Carbon 4th gen (type 20FB and 20FC) and X1 Yoga 1st gen (types 20FQ, 20FR) was released Aug 2 (n1ful37w.zip)

 

https://pcsupport.lenovo.com/de/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-type-20fb-20fc/downloads/ds111756

 

Direct link:

 

https://download.lenovo.com/pccbbs/mobiles/n1ful37w.zip

 

That .zip file contains two .cab files, N1FET70W.cab and N1FHT35W.cab, for the BIOS and ECP respectively. Updating the BIOS in linux for my X1 Carbon 20FB worked fine for me with fwupdmgr, but failed for the ECP. This was because the metadata for the ECP update has a typo. Inside the N1FHT35W.cab file is a firmware.metainfo.xml, with a GUID of:

 

4c2e5b5c-6467-43af-afeb7bc72d96b9c3

 

This is incorrect. It's missing a dash, and should read:

 

4c2e5b5c-6467-43af-afeb-7bc72d96b9c3

 

Modifying this file within the .cab (or extracting it and generating a new .cab) and then flashing that with fwupdmgr fixed the problem. I've attached the modified .cab file (nested in a .zip file for upload). You can check yourself that the only thing that's changed is the GUID line in the .xml file.

 

This typo should be fixed in the source by Lenovo and reuploaded as perhaps a rev 2 for n1ful37w.zip . Hopefully this hasn't happened for any other firmware update files.

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392 Posts

03-03-2017

JP

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Re: GUID typo in X1 Carbon/Yoga 4th/1st gen ECP linux firmware update (n1ful37w.zip)

2019-09-09, 7:50 AM

Dear customer,

we confirmed the issue in this ZIP file and fix.   Please get the updated ZIP file from the same location now.

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