Need help AMIBIOS(Aptio4) Intel VT-X hidden, modding to eable

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

Hi everyone, I’ve got an OEM chinese mb with i5-3337u (VTx supported) but option is hidden in BIOS,
I’ve dumped bios with AfuWin64 and tried to enable option with AMIBCP4.53, after flashing "afudos xxx.bin /GAN "
there were no effect at all (I also tried to unlock other options)

then I tried update NVRAM, ()
UEFITool (Search ‘Virtualization’)
(only 1 ocurance) MiniSetupResourceSection → extract s it → ifrExtractor:
0x1F46D: OneOf Prompt: “Intel Virtualization Technology”, Help: “When enabled, a VMM can utilize the additional hardware capabilities provided by Vanderpool Technology”, QuestionFlags: 0x10, QuestionId: 0x20, VarStoreId: 0x1, VarOffset: 0x3A, Flags: 0x10, Size: 8, Min: 0x0, Max: 0x0, Step: 0x0 { 05 A6 14 01 15 01 20 00 01 00 3A 00 10 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 }
0x1F493: OneOfOption Option: “Disabled” Value: 0, Default, MfgDefault { 09 0E 17 01 30 00 00 00 00 00 00 00 00 00 }
0x1F4A1: OneOfOption Option: “Enabled” Value: 1 { 09 0E 16 01 00 00 01 00 00 00 00 00 00 00 }
0x1F4AF: End { 29 02 }

Using grub-mod-setup_var
setup_var 0x3A 0x01 - this works, but not permanent, until reset bios to defaults

But I still want to make the option visible or Enabled by default.
I am a bit stuck with it, may someone help?
As I understand, only need to update those 2 and make
0x1F493 be like 09 0E 17 01 00 00 00 00 00 00 00 00 00 00
0x1F4A1 be like 09 0E 16 01 30 00 01 00 00 00 00 00 00 00

Am I correct?

Bios backup:

sct file:

2

Hi,
you’ve done a lot of the work already. here’s my idea of what you need to do next :
changing:

0x1f493: change default = no → 09 0e 17 01 00 00 00 00 ...
0x1f4a1: change default = yes → 09 0e 16 01 30 00 01 00 ...

would set the “enabled” option as the default and remove the default flag from “disabled”

but that alone might not be enough

check if the option is hidden with this :

in the ifr output, look for a line like:

suppressif: { 19 82 ... }

this might be hiding the vt-x option

make sure default value is set in nvram too