[Request] Thinkpad X1 Extreme Gen 4 - Modify FN special keys and unlock undervolting

[lockridge]

Hi all! I'm curious if it'd be possible to mod the BIOS to allow me to change the FN "special" keys and perform a CPU undervolt.

Would it be possible to send a virtual key to windows, or something similar, so they could be remapped with powertoys or sharpkeys? I personally have absolutely zero use for the "project" through "hang up" buttons, and would much rather be able to use them as media keys.

The above is most important, but I'd also like to see a battery life & thermal improvement through a CPU undervolt (as I've been able to do in the past!).

Request: Enable undervolting, modify FN special keys function for custom remapping.

I'm happy to do a BIOS dump if necessary as well, I'll take a few days though.

BIOS Version/Date: LENOVO N40ET32W (1.14), 1/3/2022
BIOS direct download: https://download.lenovo.com/pccbbs/mobiles/n40ur11w.iso
Source: https://pcsupport.lenovo.com/us/en/produ...river-list