Next, we need to modify this variable back to 0x0. In order to activate it, we need to do three things: First we need to find the offset (the location) of the variable in the UEFI variable storage.
In recent BIOS, this variable was changed to 0x1 (enabled) and so undervolting was no longer possible. Until BIOS 1.5, this variable was set to 0x0 and so disabled. However, they were not really removed, they were only locked by an UEFI variable called “Overclocking Clock”. Some of you may remember that officially undervolting is only possible with BIOS versions up to 1.5 as, due to Plundervolt, Intel forced the device manufacturers to remove undervolting capabilities. Undervolting on Huawei Matebook X Pro 2020 i5 with BIOS 1.12, -75mV is stable for me. As proof, I present you here the results of this work on my Matebook X Pro, 2020, i5 version with BIOS 1.12 that I’ve undervolted to -75mV. Do I have to configureThanks to excellent posts of /u/Snoozhead and /u/Wouter_001, I have found a way of how we can enable undervolting on all Huawei Laptops, with all BIOS versions. I guess it has something to do with BIOS slimbootloader + UEFI payload. But when I use UP Squared BIOS, FPT run well without raising issue. The same issue applied to any commands relate to read flash like -F, -ERASE, -VERIFY. When I boot the platform and run the tool Intel's Flash Programming Tool (FPT), the tool raise error when I use commandĮrror 371: An error occurred reading the flash descriptor signature. I am building BIOS with slimbootloader + UEFI Payload for UP Squared platform (Apollo Lake). On Behalf Of Kiet Pham Sent: Thursday, Ap1:47 AM To: Subject: Flash programming tools (FPT) raise error when reading slimbootloader + UEFI payload BIOS Do I have to configureĪnything to make FPT tool can read flash successfully. The same issue applied to any commands relate to read flash like W25Q128FW ID:0圎F6018 Size: 16384KB (131072Kb)Įrror 371: An error occurred reading the flash descriptor Version: 3.Ĭopyright (c) 2007 - 2021, Intel Corporation. Programming Tool (FPT), the tool raise error when I use command FPTW64.exe
When I boot the platform and run the tool Intel's Flash I am building BIOS with slimbootloader + UEFI Payload for UP