BIOS DVMT, Speedshift, 0xE2, fans fixes.

Hello there! I'm glad to show some of the Cyb's works on XMNBP BIOS modding! What's done:

1. The most important - DVMT set to 64MB -> i booted without IntelDVMTFixup
2. Native Intel HWP - better CPU power management with MBP15,2 profile.
3. 0xE2 LOCK disable - now we can boot vanilla kernel without any patches on Clover side.
4. Nuvoton Embedded Controller firmware mod - now fans kicks in on 55 degrees Celsius, which means that laptop stays quiet 95% of the time (even when i use IDE, which is actually awesome).
   Also he managed to make BIOS and EC region R\W, which means we can make further modifications in every point.

The work itself is now more like Proof-of-Concept, mods are based on Insyde's H20UVE utility to patch UEFI variables, for that Cyb is using CMD + PowerShell scripts, which makes a bit of a trouble to use it (PowerShell execution policy is ugly and often makes problems). Now he's working on a Python executable to make things a lot easier for basic user. Windows environment is needed. Just to try i will upload some scripts, here it is exps5.5_en.zip. I will hold on EC mod as it's dangerous and untested (in "shit happens" case you should have programator and disassemble the laptop to restore it's functionality), but for now all is awesome for me.

So, as an addition - my suggestion is to revert basic GPU injection method as it should work far more better with normal DVMT, because WhateverGreen is now a bit fat, clumsy solution in terms of Intel graphics. It's awesome, but as it's in stage of initial development there may be problems.

[gplast]

Hello @Pavellj, i'm always looking and following this repository. Both @stevezhengshiqi and you are doing a great job and im really thankful about that, because i like so much that i mess around with my laptop :P Can you please share with me the script for EC mod, i really want to test it also and i can give you my feedback if you want to test it. Really this is something that is been bothering me since i got the laptop. I followed a lot of forums where they talk about it, by no one managed to do what you did. I will understand if you dont want to share it :)

[gplast]

Also when i run DVMT_set.cmd i get this error message:
Now parsing Variable Information.
Succeed to get bios data.
Complete parsing Variable Information!!!
Saving Variable Information to file: sasetup_my.txt
Successfully read variables
FAILED!

Can you please tell me what i might doing wrong?

@gplast That's actually what I told about - it's PowerShell error. Basically you can bypass it - Wait untill FAILED message, execute bin/patchscript_dvmt.ps1 and after that execute h2ouve -sv sasetup_patched.txt -n SaSetup under / folder, so you completing script work from point it's stopped. Blame PowerShell policy for that clumsy way of solving problems

[gplast]

Thank you very much, i managed to run the script by

• running power shell as an administrator
• run this command: Set-ExecutionPolicy -ExecutionPolicy Unrestricted
• write A and press enter, and Reboot System
• then run again the script and everything works

Also i would like to mention that all the other scripts can run without a problem just by double ckicking on them.

[stevezz3]

@Pavellj You and Cyb really did a great job. I just have a small suggestion. Because IntelGraphicsFixup is not maintained anymore, WhateverGreen is probably a better choice. Also, IntelGraphicsDVMTFixup doesn't work well on our device in Mojave. The way to remove DVMT patch is like this:

• Open /CLOVER/config.plist
• Delete following part
  <key>framebuffer-fbmem</key> <data>AACQAA==</data>
  and
  <key>framebuffer-stolenmem</key> <data>AAAwAQ==</data>

Update - EC mod is tested and working as expected.
Mi Notebook Pro EC.zip
That's still PowerShell scripting, but it's too long to wait for rewrite. Big thanks to Cyb

[biox86]

Darn, I was so excited that I downloaded everything but after unzipping the file I found out that the scripts have cmd extension.
Do you think there will be a way to do every operation on osx or windows will ever be needed and the future python script will be for windows too? I just have a single disk with osx and I'm wondering how could I bypass this limitation without installing win and restoring osx or buying a 2nd ssd.
Do you think the scripts could work through a VM with parallel or VMware? I don't know if the BIOS is reachable from there or if you are going to get lost in something simulated from the programs.

1. Yeah, scripts are only for Windows now :( Btw you can use Windows PE flash drive, there is a lot of "live-udb" bundles of Windows 10
2. Should be usable after Python rewrite on both macOS and Windows
3. Should work with VM i think, but better use Live-USB (Windows 10 Strelec for example)

[biox86]

Thanks for the info. I’ll try booting win from a flash drive then. I’ll let you know as soon as I try.

[johnnynunez]

What is your efi now with new EC? @Pavellj

@johnnync13 nothing special, i just deleted the kernel patch about CFG LOCK, because one of these bios mods unlocked them.

[johnnynunez]

@Pavellj are there any bios mod version for Xiaomi mi Air 8550u?

[alexmenn]

Im having troubles with windows in Parallels to do it. Here are my error when I try to execute (as admin) any script. How can I fix it?