I found this thread about UEFI editor (h_ttps:///t/tool-uefi-editor/91500/4) … how do I do that “simple task” of changing default values ? and that I have windows booting AND bios POST.disabled CSM in bios and enabled “above 4G decoding” and “above 4G decoding patch” => ok.… so how do I perform that task of changing default values in bios ? because I have clearly struggled to simply enable “above 4G decoding” in my actual bios, I did it maybe 10 times because either a) my windows did boot but I had no more bios post and display so no more bios settings or b) I had bios screen but windows would not boot and stay with a single “-” in top left corner … there are some “MMtool” available somewhere, I downloaded them, I can open my bios, but there is no place where I could change default settings values.amibcp SHOULD NOT be used on “aptio V” bioses (99% of messing things), and it IS the plaform of my bios.amibcp is not really available (is it ?).To mitigate this issue you can use AMIBCP to enable 4G decode and disable CSM by default.”
This can be a problem as CMOS clear will reset BIOS settings (4G/CSM) while keeping ReBarState enabled requiring you to boot with iGPU/non-rebar GPU to disable ReBarState. On the ReBarUEFI github from xCuri0, there is something that is quite disturbing : “Some firmware don’t clear NVRAM variables (ReBarState) when the CMOS is cleared. Saved the bios with the option to remove flash protection (the bios has the exact same size after that) Updated CPU microcodes as explained in the UBU thread Modding (adding dxe driver) at the end of the big dxe section with uefitool(non ne), like explained here h_ttp://
UEFITOOL 0.28.0 HOW TO
Read the guide UEFItool guide at How to extract/insert/replace EFI BIOS modules by using the UEFITool Uefitool NE from h_ttps:///LongSoft/UEFITool/releases UBU (uefi bios updater) from h_ttps:///t/tool-guide-news-uefi-bios-updater-ubu/30357 ReBarDxe.ffs from h_ttps:///xCuri0/ReBarUEFI Uefitool 0.28 from h_ttps:///LongSoft/UEFITool/releases/tag/0.28.0 The manufacturer original bios(es) : 1.80 (my actual bios) and 1.82beta (a beta bios from 2019, with “updated” microcodes but they are still not up to date according to UBU) from
So I read a lot of things, and here are the steps I followed and that I would be glad if some experts would validate. I want to add and enable Resizable Bar for my new nvidia GPU to perform “better” (as it does underperform according to benchmarks)
I have several reasons to achieve :ĬPU microcodes are not up to date, and maybe that’s the reason why I can’t backup my system in clonezilla (screen is all messed up with error messages and cpu microcode refs) (I can backup in rescuezilla though)
UEFITOOL 0.28.0 MOD
I’m trying to mod my bios on an asrock X99 taichi. May I ask for some guru assistance please ?
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