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lexinger
What's DOS?
Posts: 1
Registered: ‎11-09-2018
Location: AT
Views: 659
Message 1 of 4

L480 - BIOS update 1.28 causes trouble

Thinkpad L480 20LSCTO1WW
Windows 10 x64 Pro

After i updated the BIOS to recent version 1.28 some problems occured:
1) Touchpad and Trackpad not working (although they were enabled in BIOS and listed in Windows Devices)
2) Keyboard Backlit not working

 

Tried many things: Updated the drivers manually, CMOS reset (10sek power-button), and many other things
nothing worked
After i flashed back to 1.26 everything was working again.

 

Might be useful to know if anyone runs into the some problems

Popocatepetleic
Paper Tape
Posts: 5
Registered: ‎11-11-2018
Location: NL
Views: 596
Message 2 of 4

Re: L480 - BIOS update 1.28 causes trouble

I have the same issues. Where can I find version 1.26? tnx!

Sorry I found it on the same page...;-)

 

bosox1255
What's DOS?
Posts: 1
Registered: ‎11-19-2018
Location: US
Views: 437
Message 3 of 4

Re: L480 - BIOS update 1.28 causes trouble

I had the same problem today.  I reverted back to 1.26 and my touchpad started working again.

 

Lenovo, you may want to pull this update for the time being.

Lenovo Employee joefoxK
Lenovo Employee
Posts: 21
Registered: ‎12-15-2017
Location: CN
Views: 401
Message 4 of 4

Re: L480 - BIOS update 1.28 causes trouble

Hi,we already reproduced this failure in engineering lab, it's caused by incorrect viarable in v1.26 BIOS, as updated from v1.26 to v1.28, there would be conflicting and system would got problem.

 we are working on new-fix bios force update by TVSU。

before that, can you roll-back to v1.26 BIOS temporarily?

you can find v1.26 BIOS here

https://pcsupport.lenovo.com/us/zh/products/laptops-and-netbooks/thinkpad-l-series-laptops/thinkpad-...

 

this problem happen only when machine built with v1.26 BIOS and then update to v1.28.

no problem if update BIOS from version before v1.26  to v1.28; or update BIOS from version before v1.26 to v1.26 then v1.28

 

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