Backporting the Microsoft Basic Display Adapter driver from Windows 8 Build 7963 to Windows 7

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try getting the original driver from driver store folder or winsxs folder
and just replace the display sys from win8 beta
remove the cat file and install it as unsign driver with disable driver enforcement

it might not copy the display sys to the folder
so do it manually

 

basicdisplay.sys somehow runable by renaming it to vgapnp.sys and replacing the original vgapnp.sys at system32/driver with it by using winpe, but vga.sys still a pain in the ass, cant find any replacement for it, still stuck at logo if disabled (even having basicdisplay.sys running)

edit: I checked and find out: screen can even turn on without vgapnp.sys, vga.sys is the thing that keep screen on, and doing the way mention above will cause the driver error: digital signature ( it wont use any resource-it wont work)

edit v2: the same as the v2 edit which is 4 comment below me

 

Which fileversion?

 

I just tried 7963 x86, no missing depencies, driver can be installed, but still hangs on error 39

 

my basisdisplay.sys is from 8.1 build 9600 (but is it the MAIN problem ? )

 

and btw, i think we can add a name.sys manually, in hklm/system/controlset1/serivces, for ex: basicdisplay.sys on win 8.1 has a key at hklm/system/controlset1/serivces, we can copy it and paste to win 7 version, and put basicdisplay.sys in whatever the key point to, mainly system32/driver

edit: try it and got error 577- digital signature, but the driver is added

edit v2: disable signature enforcement and the result is error 127- the specified procedure could not be found

edit v3: may be i will try the winsxs way

edit v4: everything in the winsxs file (may be not but most) cant be install via .inf because they are legacy driver, that also include basicdisplay.sys, but there are other way, according to this: h t t p s://stackoverflow.com/questions/53864109/windows-driver-install-legacy-hardware-with-command-line-tool
(remember to remove space between http)

 

To everyone: Search for WDK 8102 on BetaArchive. There is first found BasicDisplay sample. All driver files seems fine for compiling in WDK 7600, But headers looks like a problem.
This code is probably needed to make it alive (hopefully). Comparing it to 8.0 Samole, then there are huge differences. Starting from 8102 sample could be possilble to make.. I don’t have enough knowledge to do that, but will investigate it

 

Hate to bump, but do any of the provided driver samples work?

 

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I don't think it can work unless patching the winload (fill the uefi gop information to the proper context) and ntoskrnl (get the proper information and initialize the boot video).

Kenji Mouri

 

Oh nice. That would be a kernel extender.

 

Will it work alongside FlashBoot bootmgfw.efi? Flashboot converts instances of VGA and I/O ports to updates to the GOP framebuffer in ntoskrnl.exe.

 

I don't know because I cannot get the FlashBoot modified Windows binaries freely.

Kenji Mouri

 

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